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TIVP Series IsoVu Measurement System User Manual

IsoVu Measurement System User Manual

This manual describes installing and setting up the TIVP Series IsoVu Measurement System, and provides specifications and basic probe operations.


此手册适用于:

TIVP02, TIVP05, TIVP1, TIVP02L, TIVP05L, TIVP1L

  • 手册类型: 主要用户
  • 部件号: 071369207
  • 发布日期:
  • Revision: Rev B

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TIVP Series IsoVu Measurement System User Manual

TEKTRONIX END USER LICENSE AGREEMENT

This End User Agreement (“Agreement”) is an agreement between Tektronix, Inc., an Oregon corporation, and its corporate affiliates, subsidiaries, and divisions as applicable (collectively, “Tektronix,” “we,” “us,” or “our”) and You (including any entity or organization you represent, collectively, “Customer” or “You”). Please read this Agreement carefully as this Agreement governs the terms and conditions under which You are permitted to use Tektronix’s software and services.

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All Rights Reserved.

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The following license agreement applies to linker command files, example projects unless another license is explicitly stated, the cstartup code, low_level_init.c, and some other low-level runtime library files.

Copyright 2012, IAR Systems AB.

This source code is the property of IAR Systems. The source code may only be used together with the IAR Embedded Workbench. Redistribution and use in source and binary forms, with or without modification, is permitted provided that the following conditions are met:
  • Redistributions of source code, in whole or in part, must retain the above copyright notice, this list of conditions and the disclaimer below.
  • IAR Systems name may not be used to endorse or promote products derived from this software without specific prior written permission.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Iowegian ScopeIIR

Name: Biquad.c

Name: Biquad.h

Description: Provides a template for implementing IIR filters as a cascade of second-order sections, aka, "biquads".

by Grant R. Griffin

Copyright 2007-2015, Iowegian International Corporation

(http://www.iowegian.com)

The Wide Open License (WOL)

Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice and this license appear in all source copies.

THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY OF ANY KIND. See http://www.dspguru.com/wide-open-license for more information.

Important safety information

This manual contains information and warnings that must be followed by the user for safe operation and to keep the product in a safe condition.

To safely perform service on this product, see the Service safety summary that follows the General safety summary.

General safety summary

Use the product only as specified. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Carefully read all instructions. Retain these instructions for future reference.

The product is designed to be used by trained personnel only.

Before use, always check the product with a known source to be sure it is operating correctly.

To avoid fire or personal injury

Connect and disconnect properly

Do not connect or disconnect sensor tip cables, test leads, or accessories while they are connected to a voltage source. Use only test leads and accessories supplied with the product, or indicated by Tektronix to be suitable for the product.

Use only insulated voltage probes, test leads, and adapters supplied with the product, or indicated by Tektronix to be suitable for the product.

Observe all terminal ratings

To avoid fire or shock hazard, observe all rating and markings on the product. Consult the product manual for further ratings information before making connections to the product.

Do not exceed the Measurement Category (CAT) rating and voltage or current rating of the rated individual component of a product or accessory. Do not apply a potential lowest that exceeds the maximum rating.

The measuring terminals on this product are not rated for connection to mains or Category II, III, or IV circuits.

Do not operate without covers.

Do not operate this product with covers or panels removed, or with the case open. Hazardous voltage exposure is possible.

Avoid exposed circuitry

Do not touch exposed connections and components when power is present.

Do not operate with suspected failures

If you suspect that there is damage to this product, have it inspected by qualified service personnel.

Disable the product if it is damaged.

Do not operate in wet/damp conditions

Do not operate in an explosive atmosphere

Keep product surfaces clean and dry

Clean with dry cloth only

Sensor tip cables

Maintain safe clearance from the sensor head and sensor tip cable while connected to the energized circuit as recommended in this manual.

Remove the sensor tip cable and adapters from the test circuit when not in use.

Leave the sensor tip cable connected to the sensor head when not in use.

Use only correct Measurement Category (CAT), voltage, temperature, altitude, and amperage rated sensor tip cables and accessories for any measurement.

Beware of high voltages

Understand the voltage ratings for the product you are using and do not exceed those ratings. It is important to know and understand the maximum measurement voltage rating of the product. The voltage rating depends on the measurement category, the instrument, and your application. Refer to the Specifications section of the manual for more information.

WARNING:To prevent electrical shock, do not exceed the maximum measurement or maximum voltage category.

Connect and disconnect properly

CAUTION:To avoid damage to the equipment, de-energize the test circuit before connecting or disconnecting the sensor tip cable.

Terms in this manual

These terms may appear in this manual:

WARNING:Warning statements identify conditions or practices that could result in injury or loss of life.
CAUTION:Caution statements identify conditions or practices that could result in damage to this product or other property.

Isolated, electrically floating

The terms isolated, electrically floating, and galvanically isolated are used in this document to indicate a measurement where there is no direct conduction path to earth ground.

Symbols and terms on the product

These terms may appear on the product:

  • DANGER indicates an injury hazard immediately accessible as you read the marking.
  • WARNING indicates an injury hazard not immediately accessible as you read the marking.
  • CAUTION indicates a hazard to property including the product.
When this symbol is marked on the product, be sure to consult the manual to find out the nature of the potential hazards and any actions which have to be taken to avoid them. (This symbol may also be used to refer the user to ratings in the manual.)


CAUTION: Refer to Manual


WARNING: High Voltage

Compliance information

This section lists the Safety and Environmental standards with which the instrument complies. This product is intended for use by professionals and trained personnel only; it is not designed for use in households or by children.

Safety compliance

This section lists the safety standards with which the product complies and other safety compliance information.

EU declaration of conformity – low voltage

Compliance was demonstrated to the following specification as listed in the Official Journal of the European Union:

Low Voltage Directive 2014/35/EU.

  • EN 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements

U.S. nationally recognized testing laboratory listing

  • UL 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements

Canadian certification

  • CAN/CSA-C22.2 No. 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements

Additional compliances

  • IEC 61010-1. Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use – Part 1: General Requirements
  • EN 60825–1. Safety of Laser Products-Part 1: Equipment Classification and Requirements - Edition 3 (2014)
  • US 21CFR PT1010 Performance Standard for Electronic Parts 2015
  • US 21CFR PT1040 Performance Standards for Light Emitting Products 2015

Equipment type

Test and measuring equipment.

CLASS 1 LASER PRODUCT.

Pollution degree description

A measure of the contaminants that could occur in the environment around and within a product. Typically the internal environment inside a product is considered to be the same as the external. Products should be used only in the environment for which they are rated.

  • Pollution Degree 1. No pollution or only dry, nonconductive pollution occurs. Products in this category are generally encapsulated, hermetically sealed, or located in clean rooms.
  • Pollution Degree 2. Normally only dry, nonconductive pollution occurs. Occasionally a temporary conductivity that is caused by condensation must be expected. This location is a typical office/home environment. Temporary condensation occurs only when the product is out of service.
  • Pollution Degree 3. Conductive pollution, or dry, nonconductive pollution that becomes conductive due to condensation. These are sheltered locations where neither temperature nor humidity is controlled. The area is protected from direct sunshine, rain, or direct wind.
  • Pollution Degree 4. Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations.

Pollution degree rating

Pollution degree 2 (as defined in IEC 61010-1). Rated for indoor, dry location use only.

IP rating

IP20 (as defined in IEC 60529).

Measurement and overvoltage category descriptions

Measurement terminals on this product may be rated for measuring mains voltages from one or more of the following categories (see specific ratings marked on the product and in the manual).

  • Category I. Circuits not directly connected to a mains supply.
  • Category II. Circuits directly connected to the building wiring at utilization points (socket outlets and similar points).
  • Category III. In the building wiring and distribution system.
  • Category IV. At the source of the electrical supply to the building.
Note:Only measurement circuits have a measurement category rating. Other circuits within the product do not have either rating.

Environmental considerations

This section provides information about the environmental impact of the product.

Product end-of-life handling

Observe the following guidelines when recycling an instrument or component:

Equipment recycling. Production of this equipment required the extraction and use of natural resources. The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life. To avoid release of such substances into the environment and to reduce the use of natural resources, we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately.

This symbol indicates that this product complies with the applicable European Union requirements according to Directives 2012/19/EU and 2006/66/EC on waste electrical and electronic equipment (WEEE) and batteries. For information about recycling options, check the Tektronix Web site (www.tek.com/productrecycling).

Preface

This document provides information for installing and using the Tektronix TIVP IsoVu® Generation 2 Isolated Probe. The probe offers a galvanically isolated measurement solution for accurately resolving high bandwidth, high voltage differential signals in the presence of large common mode voltages with the best in class common mode rejection performance across its bandwidth.

Key features

  • New IsoVu technology - galvanically isolated, floating measurement system

    • Bandwidth from DC to 1 GHz

    • Up to 160 dB (100 million to 1 common mode rejection ratio) at DC, 140 dB (10 million to 1) at 1 MHz, 120 dB (1 million to 1) at 100 MHz, and 80 dB (10,000 to 1) at 1 GHz

  • Differential voltages up to ±2500 Vpk (sensor tip cable dependent)

  • Large common mode voltage range up to 60 kV peak

  • High impedance input up to 40 MΩ (sensor tip cable dependent)

  • Large input offset range up to ±2500 Vpk (sensor tip cable dependent)

  • DC and AC input coupling

Laser certification



This product complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007.

CAUTION:Use of controls or adjustments for performance of procedures other than those specified herein may result in hazardous radiation exposure.

Product description

The Tektronix IsoVu® (TIVP) Generation 2 is a completely galvanically isolated probe tip cable, sensor head, and TekVPI interface as shown in the following figure. Hazardous voltages in the sensor head are completely isolated from the oscilloscope by optical fiber cables.

Figure 1. TIVP Series IsoVu Measurement System

Compensation box

The TekVPI compensation box (comp box) connects the measurement system to one of the input channels on the oscilloscope. Power is supplied to the measurement system through the TekVPI interface of the oscilloscope. The buttons and indicators on the comp box provide a means for controlling the probe and indicating the overall status.

Sensor head

The sensor head provides an interface between the device-under-test (DUT) and the compensation box. It contains an electro-optic converter that converts the electrical signal from the sensor tip cables to an optical signal sent to the comp box.

Sensor tip cables

Several sensor tip cables options are available to connect the sensor head to the DUT:

  • TIVPMX10X, 10X MMCX tip cable connector

  • TIVPMX50X, 50X MMCX tip cable connector

  • TIVPSQ100X, 100X 0.1-inch (2.54 mm) square pin connector

  • TIVPWS500X, 500X 0.2-inch (5.08 mm) square pin connector

  • TIVPMX1X, 1X MMCX tip cable connector

Models

The TIVP Series IsoVu Measurement System includes the following models:

  • TIVP1. Tektronix IsoVu® Generation 2; 1 GHz Isolated Probe
  • TIVP05. Tektronix IsoVu® Generation 2; 500 MHz Isolated Probe
  • TIVP02. Tektronix IsoVu® Generation 2; 200 MHz Isolated Probe
  • TIVP1L. Tektronix IsoVu® Generation 2; 1 GHz Isolated probe (10 m cable)
  • TIVP05L. Tektronix IsoVu® Generation 2; 500 MHz Isolated probe (10 m cable)
  • TIVP02L. Tektronix IsoVu® Generation 2; 200 MHz Isolated probe (10 m cable)

Supported oscilloscopes

The measurement system can only be used with the 4, 5, and 6 Series Mixed Signal Oscilloscopes with oscilloscope software version 1.28 or greater.

Accessories

This section lists the standard and optional accessories available for the measurement system.

Standard accessories

The following table list the accessories that are shipped with the probe.

Accessory Description Part number

The 10X MMCX Tip is included in every TIVP. The MMCX tip is recommended for the best bandwidth and CMRR performance. 0.100" Square Pin and 0.200" Wide Square Pin tips are available as optional accessories.

TIVPMX10X

The Bipod is used to hold the probe. TIVP can rotate in the holder to accommodate square pin headers.

352-1179-xx

The Probe Tip Adapter is used to adapt an MMCX IsoVu tip to standard 0.100" spaced, 0.025" square pins.

131-9717-xx

The SMA Wrench/Driver Tool is a 5/16" wrench for use on a SMA connector.

003-1947-xx

The Carrying Case is a soft case (with foam insert) that protects the TIVP and enforces the optical fiber minimum bend radius.

016-2147-xx
10 m version016-2149-xx

Optional accessories

The following table lists optional accessories, such as other sensor tip cables are available.

Accessory Description Part number
50X MMCX sensor tip cable TIVPMX50X
100X sensor tip cable with 0.100" spaced square pin connectorTIVPSQ100X
500X sensor tip cable with 0.200" spaced wide square pin connectorTIVPWS500X
1X MMCX sensor tip cableTIVPMX1X
Square Pin to MMCX Adapter, 0.062" Spacing131-9677-xx
Probe Tip Tripod Support352-1170-xx
Lead, MMCX to IC Grabber 196-3546-xx
Lead, Square Pin to IC Grabber 196-3547-xx
Kit, Wide Square Pin to Banana Jack with Alligator Clamps and Support Brace 020-3189-xx
Square Pin Y-lead196-3434-xx
MicroCKT grabbers206-0569-xx

Spare Pins for 0.062" Spaced Test Points

Solder Aid for 0.062" Spaced Square Pins

020-3169-xx

003-1946-xx

Operating information

This section to help you use the IsoVu™ probe safely and effectively. Read this section before installing your measurement system to be aware of the operating requirements and clearance requirements including possible hazardous areas when the measurement system is connected to the DUT.

Measurement system handling best practices

The measurement system consists of quality parts and should be treated with care to avoid damage or degrading the performance due to mishandling. Consider the following precautions when handling the fiber-optic cables and sensor tip cables.

  • Do not crush, crimp, or sharply bend the fiber-optic cable. Avoid making loops in the fiber-optic cable smaller than 5 inches (12.7 cm).
  • Do not twist the fiber-optic cable; twisting the cable will stress the optical fibers.
  • Do not allow kinks or knots to develop in the fiber-optic cable.
  • Avoid putting tension on the fiber-optic cable.
  • Do not pull or jerk the fiber-optic cable, especially when kinks or knots are present.
  • Do not drop the sensor head or comp box assembly since damage and misalignment of the internal optical components can result.
  • Avoid over-bending the sensor tip cables; do not exceed the minimum bend radius of 2.0 inches (5.1 cm).
  • Avoid crushing the cables by accidentally running over the cable with a chair wheel or by dropping a heavy object onto the cable.
  • Never support the weight of the sensor head or comp box by the fiber-optic cable.
  • Store the measurement system in the supplied carrying case when not in use.

Environmental requirements

The maximum operating environmental ratings for the measurement system when connected to a DUT and a Tektronix oscilloscope.

Table 1. Environmental specifications

Feature

Description

TemperatureOperating

Comp box: 0° C to 30° C

Probe head: 0° C to 50° C

Tip Cable/Adapters: -40° C to 85° C

Non-Operating

Comp box: -20° C to +70° C

Probe head: -20° C to +70° C

Tip Cable/Adapters: -40° C to 85° C

HumidityOperating

Comp box: 5% to 85% RH (Relative Humidity) at up to +30° C, non-condensing

Probe head: 5% to 85% RH (Relative Humidity) at up to +40° C, 5% to 45% RH above +40° C up to +50° C, non-condensing.

Tip Cable/Adapters: 5% to 85% RH (Relative Humidity) at up to +85° C, non-condensing

Non-Operating

Comp Box/Probe Head: 5% to 85% RH (Relative Humidity) at up to +40° C, 5% to 45% RH above +40° C up to +85° C, non-condensing.

Tip Cable/Adapters: 5% to 85% RH (Relative Humidity) at up to +85° C, non-condensing.

AltitudeOperating

3000 m (9843 ft.)

Non-Operating12,000 m (39370 ft.)

Clearance requirements

The unique common mode voltage range of the measurement system allows it to be used in the presence of high frequency/high voltage common mode signals. It is important to observe all precautions while using this product.

WARNING:Electrical shock can occur while using this measurement system. The system is intended to isolate the operator from hazardous input voltages (common voltages); the plastic case of the sensor head and the shield on the sensor tip cable do not supply safe isolation. Maintain the safe clearance from the sensor head and sensor tip cable while the measurement system is connected to the energized circuit as recommended in this document. Do not access the RF Burn Hazard Zone while taking measurements on a live circuit.

While measuring high frequency common mode signals, there is a risk of RF burns. Refer to the following derating curve to identify the danger areas. Measuring common mode signals within the gray shaded area can result in RF burns within 1 m (40 in.) of the sensor head and earth ground.

Figure 1. Maximum safe handling limits for common mode voltages between the sensor head and earth ground.

The following figure shows the components of the measurement system and the potential RF burn area when working with hazardous voltages. The RF burn area of 1 m (40 in.) is indicated by the dashed lines surrounding the sensor head.

Figure 2. RF burn hazard zone around the sensor head

Controls and indicators

A description of the controls and indicators on the compensation box.

  1. STATUS indicator. For more information on the state of the LED, see Table 1
  2. SELF CAL button and LED indicator: Press to start self-calibration routine. For more information on the state of the LED, see Table 2
  3. INPUT Termination button and LED indicator: With no tip attached, press to toggle the sensor head between 50 Ω and 1 MΩ termination. For more information on the state of the LED, see Table 3
  4. MENU button: Press to open the Probe Vertical menu on the oscilloscope.
  5. ALT mode indicator: Displays special information about the probe. For more information, see Table 4

Cable flags

Flags on the cable provide high-level specifications for connecting to the DUT. They also provide a potential RF burn hazards warning and a self-calibration notification.

Sensor tip cable

Each sensor tip cable has a label that provides the maximum dynamic range and displays the attenuation factor.

Connecting to a circuit

WARNING:This measurement system contains laser sources; exposing these laser sources may cause laser exposure. Except for the sensor tip cables on the sensor head, do not remove any plastic or metallic covers from the sensor head or comp box or attempt to disassemble the product.
WARNING:Do not connect the measurement system to an energized circuit to avoid the risk of shock. Always de-energize the circuit-under-test before installing or removing the tip cable from the circuit-under-test. The plastic case of the sensor head and the shield tip of the sensor cable do not supply the isolation.
WARNING:To avoid the risk of electrical shock or RF burns while the DUT is energized, do not touch the sensor head or sensor tip cable while taking measurements. Always keep a 1 m (40 in.) clearance from the sensor head during the measurement. Figure 2

Be sure to check the maximum ratings and derating curve for more information on the RF burn hazard zone. Figure 1

CAUTION:To avoid possible damage to the equipment, do not connect the coaxial (common) shield of the sensor tip cable or SMA input to the high impedance portion of a circuit. The additional capacitance can cause circuit damage. Connect the coaxial (common) shield to the low impedance section of the circuit.
Note:Touching the sensor head or sensor tip cable when measuring a high frequency common mode signal increases the capacitive coupling and can degrade the common mode loading on the circuit-under-test.
WARNING:To prevent the arc flash caused by a different potential, do not place the sensor head or sensor tip cable on the circuit that has the different voltage.

The following steps describe the process for connecting the measurement system between an oscilloscope and the DUT.

  1. Verify the DUT is not connected to an energized circuit.

  2. Connect the compensation box to one of the channels on the oscilloscope.



  3. Install the sensor tip cable to the sensor head.

    1. Line up the sensor tip cable with the sensor head.

      Take care to avoid bending or twisting the sensor tip cable assembly during this process.

    2. Connect the SMA connector of the sensor tip cable to the sensor head. Use the SMA wrench to tighten the SMA cable to 4 to 5-in lbs.

      Use the adjustment tool that was shipped with your probe.

    Figure 1. Connecting the sensor tip cable to the sensor head


  4. Connect the sensor head to the included bipod or a similar support.

    This support keeps the sensor head steady reducing the potential mechanical stresses at the electrical connection point of the DUT. The support also keeps the sensor head away from surrounding circuits and conductive objects to minimize the parasitic capacitive coupling to these surroundings.

    Figure 2. Connect the sensor head to the bipod


    Note:To obtain the most accurate measurement, allow the measurement system to warm up for 20 minutes. Then perform the self-calibration before connecting the tip cable to the DUT and taking the measurement.
  5. Connect the sensor tip cable end to the DUT. If you are using MMCX sensor tip cable, connect it to an MMCX connector on the DUT or to a square pin adapter on the DUT. The adapters connect to square pins with either 0.100-inch (2.54 mm) spacing or 0.062-inch (1.57 mm) spacing. Figure 1

    If you are using one of the square pin sensor tip cables, connect it directly to the square pins on the DUT. Connecting the sensor tip cables

  6. Set up the controls on the oscilloscope.

  7. Apply power to the DUT to take the measurement.

Self-calibration

The TIVP contains a self-calibration function that corrects gain accuracy, DC offset, and frequency response. These parameters change as the probe warms up to the operating temperature and remain constant once the temperature reaches steady-state. After the probe warms up, self-calibration is recommended when there is a 5°C change in ambient temperature. An indicator LED on the compensation box provides the status of the self-calibration. See the Controls and indicators for more information on the LEDs.

To check the status of the self-calibration programmatically, use the SELFCAL:STATE? PI command to determine whether a self-calibration is RECOMMENDED, RUNNING, or PASSED.

Before performing critical measurements, run a self-calibration to ensure the probe is compensated.

Note:The sensor tip cable does not need to be removed from the test point to successfully complete the self-calibration.
  1. Connect probe to an oscilloscope channel.
  2. Press the SELF CAL button on the probe compensation box. The Self Cal indicator LED will blink while self-calibration is in process.
  3. Self-calibration is complete when the indicator LED displays green.

To run the self-calibration programmatically, use the CH<x>:PROBE:SELFCAL EXECUTE PI command. The connected channel is specified by "x".

The TIVP probe takes about 20 minutes to warm up. During this time, acquired waveforms may show obvious aberrations. The following screen shot shows how a 1 KHz square wave appears at the beginning of the warm-up period. Notice how the probe appears to be uncompensated.

Note:When moving a probe that has fully warmed up to a new oscilloscope channel, you must give the probe another 5 minutes to warm up on the new channel.

After 20 minutes, most of the aberrations are gone. Self-calibration can be used before the probe reaches its operating temperature, however those self-calibration settings will become invalid a few minutes later as the internal temperature changes.

Self-calibration takes less than 2 minutes to complete. Your signal does not need to be disconnected from the probe head when running self-calibration. The LED next to the SELF CAL button on the compensation box will flash yellow during the operation. When complete, the LED will either turn green (passed) or red (failed).

The SelfCal Status indicator in the oscilloscope Probe Setup menu indicates whether self-calibration is required.

Note:In 4/5/6 Series Mixed Signal Oscilloscopes, commands are available to start and monitor self-calibration and a status query to determine if self-calibration is needed.

AutoZero

AutoZero and self-calibration work on different parts of the measurement system. Self-calibration optimizes measurements through adjusting parameters in the probe. AutoZero is an oscilloscope function and is used when a displayed waveform is not centered correctly (for example; due to a small DC offset error). AutoZero automatically runs after self-calibration. It is not necessary to disconnect your signal from the probe when running a self-calibration. However, when AutoZero is run by itself, the signal must not be present.

When the TIVP changes between its internal ranges it may be beneficial to run an AutoZero from the oscilloscope. The TIVP internal range will change in Auto Range mode when the Vertical scale of the oscilloscope is changed. The probe internal range will also change in Manual Range mode if a different range is selected from the Probe Setup menu in the channel vertical settings.

Menu button

Press the MENU button on the comp box to view the Probe Setup menu on the oscilloscope.

Figure 1. Probe Setup menu

Use the menu options on the oscilloscope to change the probe settings.

Ranges

The measurement system has a variety of ranges available for you to select, whether the probe is being used with or without a tip. This allows for tradeoffs to be made between noise and dynamic range depending on the needs of the measurement being made.

CAUTION:To avoid damaging the probe, do not exceed the Peak Voltage rating for a given tip or the probe head. The Maximum Non-Destruct Voltage limit (Peak Voltage) does not increase when the Probe Ranges are changed. For example, the TIVPMX50X limit of ±250 Vpk is the same for all range settings.

In 4, 5, and 6 Series oscilloscopes, 9 ranges are selectable when Range Mode is set to Manual. The recommended V/div settings are displayed in the table below. The ranges shown are for the probe SMA input and 1X tip. Multiply the range and V/div setting by the tip attenuation to get the values for a sensor tip cable.

Table 1. Ranges and 4/5/6 Series MSO Volts/div settings
4/5/6 Series MSO probe rangesRecommended V/div setting
20 mV2 mV/div
40 mV5 mV/div
80 mV10 mV/div
160 mV20 mV/div
320 mV50 mV/div
640 mV100 mV/div
1.28 V200 mV/div
2.56 V500 mV/div
5 V1 V/div

When using a tip, the label of each sensor tip cable shows the maximum dynamic range and the attenuation factor. For example, the TIVPMX10X has a 10X attenuation factor and displays a signal with a ±50 V differential voltage. When more sensitive ranges are selected, dynamic range is limited. Refer to the Linear differential input voltage range in the specifications table for more information.

Auto Range

In 4, 5, and 6 Series oscilloscopes, the Range Mode is selectable for either Auto Range, or Manual. With the Range Mode set to Auto Range, the probe range is automatically selected when the V/div knob on the oscilloscope is turned. The relationship between probe range and V/div setting matches that shown in Table 1.

Selecting a sensor tip cable

CAUTION:Avoid over-voltage conditions that can damage or degrade the sensor head input termination by selecting the correct sensor tip cable. Selecting the correct sensor tip attenuation factor is crucial to ensure that the sensor head input termination is not degraded or damaged by an over-voltage condition. Select the sensor tip cable that will provide the lowest attenuation possible for the signal being measured.

When selecting a sensor tip cable for a particular application, consider the following questions:

  • What is the maximum RMS/Peak Voltage at the test point being measured (for example, under a fault condition)?

  • What is the minimum single-ended input resistance that my circuit can tolerate?

  • How large of a signal do I want to display at one time on the oscilloscope?

  • What sensitivity do I need (for example, the minimum V/div setting)?

The following table will help you select the correct sensor tip cable. Start at the top of the table and work down. Choose the first tip that meets all of your criteria.

Table 1. Sensor tip cable selection
Sensor tip cableMost sensitive V/div setting Dynamic range Maximum non-destruct voltage (DC + pk AC)Single-ended input resistance
TIVPWS500X500 mV±2500 V3300 Vpk40 MΩ
TIVPSQ100X100 mV±500 V600 Vpk9.75 MΩ
TIVPMX50X50 mV±250 V300 Vpk9.75 MΩ
TIVPMX10X10 mV±50 V250 Vpk10 MΩ
TIVPMX1X1 mV±5 V100 Vpk / 5 VRMS1 MΩ / 50 Ω
SMA Input 1 MΩ1 mV±5 V100 Vpk1 MΩ
SMA Input 50 Ω1 mV±5 V5 VRMS50 Ω

For maximum non-destruct voltage refer to the Maximum differential input voltage vs frequency derating graphs.

Deskew

Each probe comes loaded with nominal propagation delay values that can be automatically applied through the Vertical menu on the oscilloscope. Deskew accuracy can be improved using a known signal and a deskew fixture. When the timing relationships between waveforms is critical, always deskew your test system with known equipment.

Input offset

The measurement system provides an adjustable input referred offset voltage. This enables viewing a portion of the signal that is off-screen or examining sensitive behavior riding on a larger differential voltage. For example, a 0 V to 600 V step would normally exceed a ±500 V input range. By applying 300 V of offset, the 600 V step is brought into the dynamic range of the probe and can be viewed accurately. Offset is applied by the probe and has a much greater range than the oscilloscope alone.

Input coupling AC or DC

The TIVP sensor head contains both DC and DC Reject input coupling modes. By default, DC coupling is enabled; the mode is switchable through the scope interface or PI command.

The DC input coupling setting provides a direct, DC coupled, electrical path in the sensor head; it accepts all types of signals, including unchanging DC voltages, time-varying DC voltages, AC, and combinations of AC and DC.

When DC input coupling is selected, any applied offset is injected at the sensor head and the offset range depends on the attached tip cable attenuation.

DC Reject input coupling setting provides an AC- only path in the sensor head, removing DC offset from any mixed signal to view the AC component of the signal. DC reject is useful when you measure small amplitude signals superimposed on a large differential offset component.

With DC Reject enabled, offset is applied at the oscilloscope input and is limited by the offset capability of the specific Volts/Div setting on the oscilloscope multiplied by the selected tip attenuation.

Voltage range

The TIVP is designed to enable characterization of high frequency circuits with a wide range of differential voltages in the presence of common mode voltages. Understanding the limits and differences between the voltage ratings as discussed in this section is essential to optimize signal fidelity and measurement accuracy.

Although the common mode voltage range of the probe is very large (>60 kV), the differential input range is limited and depends on the tip attenuation, the gain range selected, and the applied offset.

The input voltage conditions are divided into several different input ranges.

Common mode voltage range

TIVP sensor head is optically isolated from earth ground, making the common mode input range >60 kV. The differential input range is more limited and refers to the signal that can be applied across the probe tip, regardless of the common mode voltage.

Offset voltage range

Offset voltage can be applied through the oscilloscope Vertical menu settings. The input offset capability of the probe extends from ±25 V to ±2500 V depending on the tip used. This offset is applied at the sensor head of probe and can be useful to bring applied signals within the dynamic range (Vdiff) of the probe.

Maximum non-destruct differential voltage range

The maximum non-destruct differential input range is the maximum differential voltage that can be applied to the input without damaging the probe. This is a DC +peak AC rating (no portion of the differential input signal should exceed this value). The maximum non-destruct differential voltage varies from ±20 V to ±2500 V depending of the sensor tip cable being used. Exceeding these levels will cause permanent damage to components of the sensor head. Additionally, the TIVPMX1X and SMA input also have VRMS limits.

Connecting the sensor tip cables

Tektronix provides different types of sensor tip cables to connect to the circuit board.

The MMCX sensor tip series connect directly to MMCX connectors on the circuit board or to probe tip adapters installed on the circuit board. Installing the probe tip adapters

The square pin series sensor tip cables connect directly to the circuit board as shown in the following figure.

Figure 1. Square pin series sensor tip cables

The SQPIN series sensor tip cables connect to 0.1-inch (2.54 mm) square pins on the circuit board. The WSQPIN series sensor tip cables connect to 0.2-inch (5.08 mm) square pins on the circuit board.

Probe tip tripod

Use the probe tip tripod to connect the sensor tip cables to adapters on the circuit board. This tripod has flexible hinges to easily position the probe tip cable above the adapter on the circuit board. Tektronix recommends gluing the tripod in place on the circuit board to provide additional support for the sensor tip cables. The following figure shows an example of connecting to an adapter on the circuit board with the tripod; it reduces stresses on the test point.

Figure 1. Connecting to an adapter on the circuit board with the probe tip tripod


Installing the probe tip adapters

Tektronix provides two probe tip adapters to connect the MMCX sensor tip cables to pins on the circuit board. The MMCX-to-0.1-inch (2.54 mm) pitch adapter and the MMCX-to-0.062-inch (1.57 mm) pitch adapter.

One end of each adapter has an MMCX socket for connection to an IsoVu MMCX tip cable. The other end of the adapter has a center pin socket and four common (shield) sockets around the outside of the adapter. Notches on the adapters can be used to locate the shield sockets. The procedure for installing these adapters are the same, the main difference is the spacing of the pins on the circuit board.

To install the adapters onto the square pins, line up the center of the adapter with the signal source pin on the circuit board. Use the notch on the adapter to align one of the shield sockets to the common pin on the circuit board. The following figures show examples of lining up the adapters on the circuit board.

To achieve the best electrical performance, especially the CMRR performance and EMI susceptibility, place the probe tip adapter as close as possible to the circuit board.

Figure 1. Lining up the MMCX-to-0.1-inch (2.54 mm) adapter on the circuit board


Figure 2. Lining up the MMCX-to-0.062-inch (1.57 mm) adapter on the circuit board


After lining up the adapters gently push down on the adapter to seat it in place on the circuit board.

Figure 3. Pushing the MMCX-to-0.062-inch (1.57 mm) adapter in place


Figure 4. Pushing the MMCX-to-0.1-inch (2.54 mm) adapter in place


When the adapters are firmly in place on the circuit board connect the sensor tip cable to the top of the adapter while using the probe tip tripod to ease the tension off the probe tip cable and adapter. Figure 1

Installing the square pins on the circuit board

The following figure shows the recommended clearance requirements for connecting the adapters to the square pins on the circuit board. The bottoms of the adapters are shown at the top.

Figure 1. Adapter clearance requirements


The 0.025-inch (0.635 mm) square pins should already be located on the circuit board. Some square pins might have headers installed on the circuit board. Tektronix recommends removing the plastic spacer from the square pins to gain closer access to the circuit board as shown in the following figure to achieve the best electrical performance, especially CMRR. You might need to use a pair of tweezers to remove the spacer as shown in the figure.

Figure 2. Removing the header from square pins on the circuit board


Tektronix provides a set of solder pins (0.018-inch (0.46 mm) diameter) to install on the circuit board for use with the MMCX to 0.062-inch (1.57 mm) adapter. Use the soldering aide tool accessory (Tektronix part number, 003-1946-xx) to install these pins on the circuit board.

Note:The solder pins are extremely small and can be challenging to handle. Tektronix recommends using tweezers and a magnifying tool when installing the pins on the circuit board.

The solder pins can be installed around a surface mounted component on the circuit board, but adequate clearance should be maintained for a good electrical connection for the adapter. Figure 1

Note:The coaxial (common) shield of the sensor tip cable and tip adapters should always be connected to the lowest impedance point (usually a circuit common or power supply rail) in the circuit-under-test (relative to the sensor tip cable/center conductor) to obtain the most accurate waveform.

Use the following steps to install the solder pins using the soldering aide on the circuit board:

  1. Carefully insert the solder pins into the soldering aide as shown in the following illustration.

    Figure 3. Using the soldering aide to install the square pins on the circuit board


  2. Use the soldering aide to hold the square pins in place while soldering the square pins to the circuit board.

  3. If necessary apply a small amount of adhesive to further strengthen the connection to the circuit board. However, keep the height of the adhesive to a minimum to provide good electrical contact for the adapter. Figure 1

Specifications

The following tables list the specifications for the measurement system. The specifications are Typical unless noted otherwise.

The performance limits in this specification are valid with these conditions:

  • The instrument must be in an environment with temperature, altitude, and humidity within the operating limits described in these specifications.

  • The instrument must have had a warm-up period of at least 20 minutes.

  • The measurement system is powered from a TekVPI compatible oscilloscope.

Warranted specifications describe guaranteed performance with tolerance limits or certain type-tested requirements.

The performance verification procedures are listed later in this document. Performance verification procedures

Overview

Characteristic TIVP1 TIVP05 TIVP02
Bandwidth 1 GHz 500 MHz 200 MHz
Rise time 450 ps 850 ps 2 ns
Differential Input Voltage Range, Offset Range, Single-ended Impedance

Use only the sensor tip cables listed.

Sensor tip cable Differential input voltage range Offset range Single-ended input impedance
SMA Input (50 Ω mode) ±5 V ±25 V50 Ω || N.A.
SMA Input (1 MΩ mode)±5 V±25 V1 MΩ || 11 pF
TIVPMX10X±50 V±200 V10 MΩ || 2.8 pF
TIVPMX50X±250 V±250 V 9.75 MΩ || 2.3 pF
TIVPSQ100X±500 V±500 V9.75 MΩ || 3.5 pF
TIVPWS500X±2.5 kV±2.5 kV40 MΩ || 2.4 pF
TIVPMX1X±5 V±25 V50 Ω or 1 MΩ || 28 pF
Common Mode Rejection Ratio

Approximately 20 dB lower in ±5 V Range, except at DC.

Sensor tip cable DC 1 MHz 100 MHz 200 MHz 500 MHz 1 GHz
SMA Input (50 Ω mode) 160 dB145 dB100 dB100 dB100 dB90 dB
SMA Input (1 MΩ mode) 160 dB145 dB100 dB100 dB100 dB90 dB
TIVPMX10X160 dB115 dB92 dB90 dB85 dB80 dB
TIVPMX50X160 dB110 dB80 dB80 dB80 dB70 dB
TIVPSQ100X160 dB105 dB60 dB50 dB35 dB25 dB
TIVPWS500X160 dB90 dB50 dB40 dB20 dB10 dB
TIVPMX1X160 dB125 dB115 dB110 dB100 dB90 dB
Maximum Non-Destructive Differential Voltage
Derated with frequency; refer to the Maximum differential input voltage vs. frequency derating graph in the Specifications section of the TIVP Series IsoVu Measurement System User Manual.
Sensor tip cable Vpk (DC + peak AC)
SMA Input (50 Ω mode) 5V RMS
SMA Input (1 MΩ mode) 100 Vpk
TIVPMX10X 250 Vpk
TIVPMX50X300 Vpk
TIVPSQ100X600 Vpk
TIVPWS500X3300 Vpk
TIVPMX1X5 V RMS (50 Ω), 100 Vpk (1 MΩ)
Common mode voltage range
60 kV peak
Common mode input impedance (Typical)
Input resistance
Galvanically isolated through the fiber optic connection
Input capacitance
<2 pF
The capacitance between the sensor head and a reference plane. The sensor head is placed six inches (15.25 cm) above the reference plane.
DC gain accuracy
Differential DC gain accuracy
<1.5% after self-cal; additional 4.5% within 4C of self-cal
System noise (rms)
Sensor tip cable ±20 mV range (most sensitive)±320 mV range±5 V range (widest range)
SMA Input (50 Ω mode) 0.43 mV rms1.46 mV rms48 mV rms
SMA Input (1 MΩ mode) 0.43 mV rms1.46 mV rms48 mV rms
TIVPMX10X4.3 mV rms14.6 mV rms480 mV rms
TIVPMX50X21.5 mV rms73 mV rms2.4 V rms
TIVPSQ100X43 mV rms146 mV rms4.8 V rms
TIVPWS500X215 mV rms730 mV rms24 V rms
Propagation delay
2 meter cable
18.3 ns
10 meter cable
63.7 ns

Common mode rejection ratio graphs

The ability to measure common mode rejection ratios (CMRR) of the IsoVu system below 100 kHz is limited by the dynamic range of test systems. Due to the optical isolation of the IsoVu sensor head, the DC CMRR performance of all tip cables is expected to be greater than 160 dB.

The following figure shows the typical CMRR values for the supported sensor tip cables.

Figure 1. Typical CMRR values for the sensor tip cables

Maximum differential input voltage vs frequency derating graphs

The following figure shows the derating values for the supported sensor tip cables.

Figure 1. Maximum differential input voltage vs. frequency for the sensor tip cables

Frequency response graph

The following figure shows the frequency response for each probe.

Figure 1. Frequency response comparison

Single-ended input impedance graphs

The following figure shows the single-ended input impedance vs. frequency values for the supported sensor tip cables.

Figure 1. Single-ended input impedance vs. frequency for the sensor tip cables

TIVP physical specifications

Table 1. Physical specifications

Characteristic

Description

Net weight

(Weight does not include accessories and packaging.)

Tip cable assembly: 25g (0.055 lb)
Probe head: 0.363 kg (0.8 lbs)
Compensation box: 0.816kg (1.8lbs)

Sensor tip cables

0.025 kg (0.055 lb)

Sensor tip cable length20.03 cm (7.886 inches)
Fiber cable length

2 meter (6.56 ft)

10 meter (32.81 ft)

Probe dimensions

Figure 1. Sensor head
Figure 2. Sensor tip cable
Figure 3. Compensation box

IsoVu measurement system block diagram

The following figure shows a block diagram of the IsoVu measurement system.

Figure 1. Block diagram


The common mode resistance and capacitance to earth ground is shown in the figure. The common mode resistance is shown as R parasitic and is essentially infinite with the IsoVu measurement system since it is galvanically isolated and can be ignored. The common mode coupling capacitance to earth ground and the surrounding circuit is shown as the Parasitic Bridging Capacitance (C parasitic). This parasitic capacitance will be approximately 2 pF when the sensor head is placed six (6) inches (15.25 cm) above a ground plane.

To minimize the effects of common mode capacitive loading consider the following items:

  • Whenever possible, choose a reference point in the circuit-under-test that is static potential with respect to earth ground.

  • Connect the coaxial (common) shield of the sensor tip cable to the lowest impedance point of the circuit.

  • Increasing the physical distance between the sensor head and any conductive surface will reduce the parasitic capacitance.

  • When using multiple IsoVu systems to measure different points in the circuit that do not have the same common mode voltages, keep the sensor heads separated to minimize the capacitive coupling.

Performance verification procedures

Use the following procedures to verify the performance of the IsoVu measurement system. Before beginning the procedures, photocopy the test record and use it to record the performance results. Test record

Required equipment

The equipment required to perform the performance verification procedures are shown in the following table.

Table 1. Required equipment for performance verification
DescriptionMinimum requirementsExample product

Supported oscilloscope with TekVPI interface

50 Ω input support, fully compatible with TekVPI interfaceTektronix 5 Series MSO
SMA male short circuit connector cap (optional)Internally shorted, copper plated contactFairview Microwave SC2135

Preparation

Prepare the equipment as follows:

  1. Turn on the TekVPI oscilloscope.

  2. Connect the TIVP probe to the oscilloscope on CH 1.
    • Remove any TIVP probe tip, if attached
    • Attach SMA Male short circuit cap (optional)
  3. Allow the test equipment to warm up for 30 minutes at an ambient temperature of about 20 °C.

System RMS Noise

This procedure verifies that the TIVP Series IsoVu measurement system is functioning and meets the warranted noise specification. The noise will be measured with no input signal at the most sensitive range.

Note:This procedure is valid for all versions of the TIVP Series IsoVu measurement systems

Setup the Measurement System

Procedure

  1. Perform a Default Setup action.
  2. Run Signal Path Compensation if recommended in Utility > Calibration...
  3. Run the self-calibration routine. Self-calibration
  4. Enable the TIVP Channel and use the following Vertical menu settings.
    • Vertical Scale: 2mV/div
    • Set Termination: 50 Ω
    • Coupling: DC
  5. Edit Trigger menu settings.
    • Type: Edge
    • Source: AC Line
    • Slope: Rising
    • Level: 0 V
    • Coupling: DC
  6. Edit the Horizontal menu settings.
    • Horizontal Scale: 10 ms/div.
    • Record Length: 10k
    • Single Sequence Stop After: 50 Acquisitions
  7. Add a measurement with the following settings.
    • Amplitude Measurement: AC RMS
    • Source: CH 1

Perform the measurement

Procedure

  1. Press the Single / Seq button.
  2. After 50 acquisitions, record the AC RMS measurement result in the test record table.

Test record

Use the test record table for recording the results of the performance verification procedures.

Table 1. Test record table

Model number:   

Serial number:

Procedure performed by:

Date: 

System RMS noise performance check

Probe

Range

Limit

Test result

TIVP120 mV1 mV RMS
TIVP0520 mV0.7 mV RMS
TIVP0220 mV0.4 mV RMS

Maintenance

Information to isolate possible failures and procedures for maintaining your probe.

Service offerings

Tektronix provides service to cover repair under warranty and other services that are designed to meet your specific service needs.

Whether providing warranty repair service or any of the other services listed below, Tektronix service technicians are well equipped to service the IsoVu measurement system. Services are provided at Tektronix Service Centers and on-site at your facility, depending on your location.

Warranty repair service

Tektronix warrants this product as described in the warranty statements at the front of this manual. Tektronix technicians provide warranty service at most Tektronix service locations worldwide. The Tektronix Web site provides information on all service locations worldwide.

Calibration and repair service

In addition to warranty repair, Tektronix Service offers calibration and other services that provide cost-effective solutions to your service needs and quality standards compliance requirements. Tektronix instruments are supported worldwide by the leading-edge design, manufacturing, and service resources of Tektronix to provide the best possible service.

Cleaning

CAUTION:To prevent damage to the measurement system, do not expose it to sprays, liquids, or solvents. Avoid getting moisture inside the comp box or sensor head when cleaning the exterior.

Clean the exterior surfaces with a dry, lint-free cloth or a soft-bristle brush. If dirt remains, use a soft cloth or swab dampened with a 75% isopropyl alcohol solution. Use only enough solution to dampen the cloth or swab. Do not use abrasive compounds on any part of the instrument.

Troubleshooting and error conditions

The following tables describes the state of each LED and lists possible problems that you might encounter when taking measurements with a TIVP Series isolated probe. Use the tables as a quick troubleshooting reference before contacting Tektronix for service.

Table 1. STATUS LED descriptions
LEDStatusAction
Green (Solid)Normal operation-
Green (Blinking)Bulk power failureTry unplugging and plugging back in. Inspect probe/scope interface. Service of probe may be required.
Red (Solid)Probe application failureTry unplugging and plugging back in. Service of probe may be required.
Red (Blinking)Probe application failure and bulk power failureTry unplugging and plugging back in. Inspect probe/scope interface. Service of probe and/or scope may be required.
Red (Blinking • • – )Self-Test failure No Power to probe headTry unplugging and plugging back in. Service of probe may be required.
Table 2. SELF CAL LED descriptions
LEDStatus
Green (Solid)Self-calibration completed successfully
Amber (Intermittent flashing)Self-calibration currently in progress
Red (Solid)Self-calibration failed
Amber (Solid)

Self-calibration recommended

Internal probe temperatures or other settings have invalidated the previous Self Cal.

Table 3. INPUT LED descriptions
LEDStatus
50 ΩSensor head SMA connector is terminated in 50 Ω ±5 V input range
1 MΩSensor head SMA connector is terminated in 1 MΩ ±5 V input range
NeitherSensor head has tip attached (switching input termination disabled)
Table 4. ALT Mode LED description
LEDStatus
Magenta (Flashing)The probe compensation box is near its maximum operating temperature. Additional cooling, such as an external fan, may be required.
Table 5. Measurement problems and possible solutions

Problem

Remedy

DC offset is present in signal
  • Run SELF CAL
  • Ensure the input signal is within the selected tip’s dynamic range
The Square Wave edge appears “smoothed”, rolled off, or uncompensated
  • Run SELF CAL
  • Make sure the scope bandwidth filter is set to full bandwidth
  • Make sure the input signal is not overdriving the probe input
The measured amplitude is smaller than expected
  • The input signal may be “railed”
  • Make sure the input signal is within the dynamic range of the selected probe tip
  • Apply offset to bring the input signal within the dynamic range of the selected probe tip
DC measurement inaccuracy
  • Run SELF CAL
  • Set the record length to at least 200 µs (longer is better) to allow time for the optical components to settle on the correct DC value
There is too much noise and you cannot accurately measure small signals
  • Select a sensor tip cable with lower attenuation
  • Set the oscilloscope vertical scale to a smaller value
  • Manually select a lower range to lower noise
There is no signal detected; the waveform is a flat line
  • Remove the sensor tip cable and check its continuity, referencing the input impedance table
  • Try putting a signal directly into the probe head SMA to check if just the probe tip or the probe itself is broken
The probe head loses power intermittently
  • Make sure the probe head is within its operating temperature range
  • Add external cooling; such as a small desktop fan
There is too much common mode noise
  • Try to remove any accessories, flying leads, or exposed wires between the test point and the probe tip
  • Use an MMCX tip with an MMCX test point either designed into the board or as an unplanned test point

Repack the measurement system for shipment

If you need to return the measurement system to Tektronix for repair, use the original packaging. If this is unavailable or not fit for use, contact your Tektronix representative to obtain new packaging.

When you return the measurement system to Tektronix, attach a tag showing the following information:

  • Name of the product owner

  • Address of the owner

  • Instrument serial number

  • A description of problems encountered and/or service required

Remote programming

This sections describes commands and queries that can be sent to the sensor head when attached to a Tektronix oscilloscope. Long-form and short-form keywords are indicated with upper/lower case letters. The commands and queries are supported by most oscilloscopes; differences in supporting oscilloscopes, if any, are described with the commands.

For additional information, refer to the programmer documentation for your oscilloscope.

Command list

The commands and queries are supported by most oscilloscopes; differences in supporting oscilloscopes, if any, are described with the commands. For additional information, refer to the programmer documentation for your oscilloscope.

CH<x>:PRObe? (Query Only)

This query-only command returns all information concerning the probe that is attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe?
Examples
CH2:PROBE? might return 1.0000E-01; RESISTANCE 1.0000E+07;UNITS "V";ID:TYPE "10X"'SERNUMBER "N/A" for a 10X probe, indicating that (among other parameters) the attenuation factor for the probe attached to Channel 2 is 100.0 mV (assuming that probe units are set to volts).

CH<x>:PRObe:AUTOZero (No Query Form)

This command executes the AutoZero function. The operation is entirely performed by the oscilloscope. The channel is specified by x.

Refer to the self-calibration procedure for information on performing the self calibration. Self-calibration

Syntax
CH<x>:PRObe:AUTOZero EXECute
Arguments
EXECute sets the probe attached to the specified channel to AutoZero.
Examples
CH1:PROBE:AUTOZERO EXECUTE sets the probe attached to the Channel 1 to autozero.

CH<x>:PRObe:FORCEDRange

The command selects the dynamic range of probe (1 of 9) in +/-V. It is dependent on the attached probe tip. The channel is specified by x. The command should only be used when CH<x>:PROBECONTROL is set to MANUAL.

Table 1. Probe tip cables and dynamic ranges
Probe tip cableDynamic Range +/-V
No tip or 1X tip0.02 | 0.04 | 0.08 | 0.16 | 0.32 | 0.64 | 1.28 | 2.56 | 5.0
10X0.2 | 0.4 | 0.8 | 1.6 | 3.2 | 6.4 | 12.8 | 25.6 | 50.0
50X1.0 | 2.0 | 4.0 | 8.0 | 16.0 | 32.0 | 64.0 | 128.0 | 250.0
100X2.0 | 4.0 | 8.0 | 16.0 | 32.0 | 64.0 | 128.0 | 256.0 | 500.0
500X10.0 | 20.0 | 40.0 | 80.0 | 160.0 | 320.0 | 640.0 | 1280.0 | 2500.0

The query returns the dynamic range of the probe tip in +/-V.

Syntax
CH2:PRObe:FORCEDRange <NR3>
CH2:PRObe:FORCEDRange?
Arguments
<NR3> specifies the probe dynamic range
Examples

If a current probe is attached to the Channel 1 input, CH1:PROBE:FORCEDRANGE 5.0 sets the attached probe to its 5 V range.

CH3:PROBE:FORCEDRANGE? might return 5.0000, indicating that the range of the probe attached to the Channel 3 is set to 5 V.

CH<x>:PRObe:GAIN? (Query Only)

The command returns the gain factor of the currently selected range (inverse of attenuation). The channel is specified by x.

Syntax
CH<x>:PRObe:GAIN?
Examples
CH2:PROBE:GAIN? might return 100.0000E-3, indicating that the attached 10X probe delivers 0.1 V to the Channel 2 BNC for every 1.0 V applied to the probe input.

CH<x>:PRObe:ID? (Query Only)

This query-only command returns the type and serial number of the probe that is attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe:ID?
Examples
CH2:PROBE:ID? might return "B010289";"TIVP1", indicating that a TIVP1 probe with serial number B010289 is attached to Channel 2.

CH<x>:PRObe:ID:SERnumber? (Query Only)

This query-only command returns the serial number of the probe that is attached to the specified channel. The channel is specified by x.

Note:For Level 0 and 1 probes, the serial number will be “N/A”.
Syntax
CH<x>:PRObe:ID:SERnumber?
Examples
CH1:PROBE:ID:SERNUMBER? might return "B010289", indicating that the serial number of the probe attached to Channel 1 is B010289.

CH<x>:PRObe:ID:TYPe? (Query Only)

This query-only command returns the type of probe that is attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe:ID:TYPe?
Examples
CH1:PROBE:ID:TYPE? might return "TIVP1", indicating that a TIVP1 current probe is attached to Channel 1.

CH<x>:PRObe:RESistance? (Query Only)

This query-only command returns the resistance of the probe that is attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe:RESistance?
Examples
CH2:PROBE:RESISTANCE? might return 10.00000E+6, indicating that the input resistance of the probe attached to Channel 2 is 10 MΩ. This query only returns valid data when a tip is attached. Otherwise, -1.0000 is returned.

CH<x>:PRObe:SELFCal:State? (Query Only)

This query-only command returns the self-calibration state of RECOMMENDED, RUNNING, or PASSED. The channel is specified by x.

Syntax
CH<x>:PRObe:SELFCal:State?
Examples
CH1:PRObe:SELFCal:State? might return RUNNING, indicating that the Channel 1 probe is currently running a self-calibration.

CH<x>:PRObe:SELFCal

This query-only command initiates self-calibration on the probe. The channel is specified by x.

Syntax
CH<x>:PRObe:SELFCal EXECUTE
Examples
CH1:PRObe:SELFCal EXECUTE runs self-calibration on the Channel 1 probe.

CH<x>:PRObe:SET

This command sets or queries the probe input resistance for the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe:SET {"50ohms ON"|"50ohms OFF"}
CH<x>:PRObe:SET?
Arguments
The text in quotes is not case sensitive. For returns, the case is the same as the last command received.
"50ohms ON" sets the input termination (when no tip is attached) to 50 Ω.
"50ohms OFF" turns off the 50 Ω input termination.
Examples
CH6:PRObe:SET "50ohms ON" sets the input termination of channel 6 to 50 Ω.
CH6:PRObe:SET? might return "50ohms OFF", indicating that the input termination on channel 6 is off.

CH<x>:PRObe:STATus? (Query Only)

This command queries the probe unsigned integer error value. The channel is specified by x.

Conditions
Requires a probe that supports the relevant error messages.
Syntax
CH<x>:PRObe:STATus?
Returns
Returns an integer number that represents the sum total of binary error bits B0 – B15. The error bits are not displayed; they are concatenated into the integer value. The following is a list of the error for each bit.
  • B0 – Probe disabled
  • B1 – Jaws open
  • B2 – Over range
  • B3 – Probe temperature out of limits
  • B4 – Degauss needed
  • B5 – Probe tip missing
  • B6 – Probe tip failed
  • B7 – Probe tip not supported
  • B8 – self-calibration is needed or recommended (the query will return 256 in decimal format)
  • B9 through B15 – Reserved
Examples
CH4:PROBE:STATus? might return 2, indicating that the probe is reporting an open jaws error.

CH<x>:PRObe:UNIts? (Query Only)

This query-only command returns a string describing the units of measure for the probe attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PRObe:UNIts?
Examples
CH4:PROBE:UNITS? might return "V", indicating that the unit of measure for the probe attached to Channel 4 is Volts.

CH<x>:PROBECOntrol

This command sets or queries multirange probe range-control policy preference of the probe that is attached to CH<x>. The channel number is specified by x.

Syntax
CH<x>:PROBECOntrol {AUTO|MANual}
CH<x>:PROBECOntrol?
Arguments
AUTO sets the values. The probe range is automatically calculated.
MANual allows you to select various valid values for the probe connected to a particular channel.
Examples
CH2:PROBECONTROL AUTO sets the values and the probe range is automatically calculated.
CH2:PROBECONTROL? might return MANUAL indicating that you can select various valid values for the probe connected to channel 2.

CH<x>:PROBEFunc:EXTAtten

This command is used to specify the attenuation value as a multiplier to the given scale factor on the specified channel. The channel is specified by x.

The query form of this command returns the user-specified attenuation.

Syntax
CH<x>:PROBEFunc:EXTAtten <NR3>
CH<x>:PROBEFunc:EXTAtten?
Arguments
<NR3> is the attenuation value, which is specified as a multiplier in the range from 1.00E-10 to 1.00E+10.
Examples
CH1:PROBEFUNC:EXTATTEN 167.00E-3 specifies an external attenuation, which is connected between the your input signal and the input of the probe attached to Channel 1.
CH2:PROBEFUNC:EXTATTEN? might return 1.0000E+00, indicating that the probe attached to Channel 2 is connected directly to the user's signal.

CH<x>:PROBEFunc:EXTDBatten

This command sets or queries the input-output ratio (expressed in decibel units) of external attenuation or gain between the signal and the instrument input channels. The channel is specified by x.

The query form of this command returns the user-specified attenuation in decibels.

Syntax
CH<x>:PROBEFunc:EXTDBatten <NR3>
CH<x>:PROBEFunc:EXTDBatten?
Arguments
<NR3> is the attenuation value, which is specified in the range from -200.00 dB to 200.00 dB.
Examples
CH3:PROBEFUNC:EXTDBATTEN 2.5 specifies an external 2.5 dB attenuator on Channel 3.
CH1:PROBEFUNC:EXTDBATTEN? might return 2.5000E+00, indicating that the attenuation for Channel 1 is 2.5 dB.

CH<x>:PROBEFunc:EXTUnits

This command sets the unit of measurement for the external attenuator of the specified channel. The channel is specified by x. The alternate units are used if they are enabled. Use the CH<x>:PROBEFunc:EXTUnits:STATE command to enable or disable the alternate units.

Syntax
CH<x>:PROBEFunc:EXTUnits <QString>
CH<x>:PROBEFunc:EXTUnits?
Arguments
<QString> indicates the attenuation unit of measurement for the specified channel.
Examples
CH4:PROBEFUNC:EXTUNITS "Pascals" sets the unit of measurement for the Channel 4 external attenuator.
CH2:PROBEFUNC:EXTUNITS? might return "Pascals", indicating that the Channel 2 external attenuator unit of measurement is Pascals.

CH<x>:PROBEFunc:EXTUnits:STATE

This command sets or queries the custom units enable state for the specified channel. The channel is specified by x.

Syntax
CH<x>:PROBEFunc:EXTUnits:STATE {ON|OFF|<NR1>}
CH<x>:PROBEFunc:EXTUnits:STATE?
Arguments
OFF argument turns off external units.
ON argument turns on external units.
<NR1> = 0 turns off external units; any other value turns on external units.
Examples
CH2:PROBEFunc:EXTUnits:STATE ON turns on external units.
CH2:PROBEFunc:EXTUnits:STATE? might return 0, indicating that external units are off for the specified channel.

CH<x>:PROBE:DYNAMICRANGE? (Query Only)

This command queries the dynamic range of the probe that is attached to the specified channel. The channel is specified by x.

Syntax
CH<x>:PROBE:DYNAMICRANGE?
Returns
The returned value is the delta between the current minimum and maximum range with some tolerance. It is also the delta between the probe range indicators (if currently displayed).
Examples
CH1:PROBE:DYNAMICRANGE? might return 1.3056 , indicating that the dynamic range of the probe attached to the Channel 1 is set to 1.3056 V.

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