AnsweredAssumed Answered

CH1 failed when do the return loss test

Question asked by coral114379403 on Apr 12, 2011
i am sure my calibration of 8753ET NA has beed done successfully, but when i do the return loss test, the NA just prompts "ch1 fail" and displays "connect std then press key to measure", then it seems do nothing.
can anyone tell me how should i do to change this situation?
thanks very much!