问题：
Why is the YBA250 application running on the NetTek showing a USER CAL? indication in red?
答案：
The internal temperature has changed more than 10 degrrees C since the last User Cal, or more than 1 week has passed. Either re-do the User Cal using the YBAC1 or YBAC3 calibration kit (or some other known-good calibration standards) or select the Factory Calibration. This will be less accurate than a recently-done User Cal, but it will still be within +/-1 dB typically. A User Calibration can improve accuracy to twice that of the Factory Calibration (at 17 dB Return Loss).
此常见问题适用于：
无产品系列
产品：
常见问题 ID 56286
查看所有常见问题 »