常见问题

This FAQ Applies to:

Product Series: Keithley 4200A-SCS Parameter Analyzer

Product Series: MDO4000C Mixed Domain Oscilloscope

Product Series: RSA306B USB Spectrum Analyzer RSA500 Series Real Time Spectrum Analyzers RSA600 Series Real Time Spectrum Analyzers

•  DPO4AERO
• DPO4AUDIO
•  DPO4AUTO
• DPO4COMP
• DPO4EMBD
• DPO4ENET
• DPO4LMT
• DPO4PWR
• DPO4USB
• DPO4VID

Note: Compatibility Issues below:

•  The DPO4BND application module is compatible with all MDO/MSO/DPO4000B/C and MDO4000 series instruments.
•  The DPO4BND application module is NOT compatible with the MSO/DPO4000 non-B Series.
• The DPO4BND requires firmware version 3.18 or greater for instrument compatibility.

Product Series: MDO4000C Mixed Domain Oscilloscope MSO/DPO4000 Mixed Signal Oscilloscope (Discontinued)

• AFG3021 and AFG3022 have a USB (B) port standard. This port is located on the rear panel. There is no option to add other types of ports
• AFG3011, AFG3021B, AFG3022B, AFG3102, AFG3102, AFG3251, and AFG3252 have USB (B), GPIB, and LAN ports standard. All of these ports are located on the rear panel.
• All AFG3000 series have a USB (A) port located on the front panel for memory stick usage.

Note: All port types use the same set of commands to control the AFG3000 series. These commands are covered in the Reference manual, which is provided standard as a PDF on the CD-ROM.

Product Series: AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator

To access the spectrum analyze, simply press the orange RF button. I know my signal is centered at around 2.4 GHz with a 20 MHz span, so I’ll use the Frequency/Span menu to adjust those. Press the Freq/Span button and use either the multipurpose knobs or the keypad to configure the center frequency and span or the start and stop frequency. Notice that the peaks are automatically marked by the MDO with frequency and amplitude information. The markers can be configured in the Marker menu. To turn the markers on or off, select the Peak Markers softkey to select it, then press it again to toggle the markers on and off. You can also use the multipurpose knob A or the keypad to change the number of markers. If you weren’t quite right on the center frequency, you can move the center frequency of the spectrum analyzer to the frequency of the reference marker by pressing the R to Center button.

The marker threshold and excursion can be changed with the multipurpose knobs or the keypad as well. Threshold sets the level above which markers will be applied to peaks, and the excursion determines how far the signal amplitude needs to fall between peaks for a marker to be applied. As I increase either parameter, the markers on the lower peaks disappear because they no longer meet the criteria because their amplitude is lower than the threshold or the excursion between peaks is lower than the excursion limit. You can also turn on Manual markers that can be controlled by the multipurpose knobs. When manual markers are activated, marker A becomes the reference marker. The marker readout can be changed from absolute to delta. When delta is activated, the frequency and amplitude information on each marker is referenced to the reference marker, and if manual markers are active, noise density is applied to marker A and phase noise information is applied to marker B.

In addition to the automatic markers, the MDO spectrum analyzer also has a spectrogram function. To access the spectrogram, press the orange RF button, press the spectrogram softkey, and press the Display softkey until it toggles on. A spectrogram is a display that captures RF over time and is ideal for analyzing RF signals that change slowly in time. Frequency is measured on the horizontal axis, time is measured on the vertical axis, and amplitude is measured by assigning different colors to pixels with cool colors showing low amplitude and warm colors showing high amplitude signals. When the spectrum analyzer is stopped, you can scroll through each slice of the spectrogram using Multipurpose knob A. Each slice shows the spectrum as it was captured at that time. Each slice is both numbered and time-correlated. Notice as the spectrum changes, the automatic markers update as well.

In addition to being a powerful oscilloscope, the MDO3000 adds the functionality of a full-fledged spectrum analyzer to its repertoire, making it an irreplaceable addition to the testbench.

For more information please see: How do I use the spectrum analyzer function on the MDO3000?

Product Series: MDO3000 Mixed Domain Oscilloscope

Video: How do I update the firmware on my AFG3000?

Product Series: AFG3000C Arbitrary/Function Generator

Only AFG3000 Series instruments with serial numbers that begin with C01 are affected. Instruments with other serial numbers, such as those beginning with C02, are not subject to this safety concern.  
 

At 31st December 2025, AFG3000 can no longer be serviced by Tektronix Service.

Product Series: AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator AFG3000C Arbitrary/Function Generator

The only way to view the file contents now is to put the file on your PC and send the file to a connected compatible printer that recognizes DeskJet, ThinkJet or LaserJet formats.