Reply To: SA44B Detector type

Hi Andrew,

Thank you for the answer.
I try to evaluate what this analyzer measure with different detector types. I did 4 measurements with the analyzer’s input closed to 50ohm termination.
Here are the results:
Realtime_Det-Min_Max
Max Hold [dBm]= -122.98
AVG [dBm]= -130.93
delta [dB]= 7.95
——–
Sweep_Det-Min_Max
Max Hold [dBm]= -126.42
AVG [dBm]= -137.17
delta [dB]= 10.75
——–
Realtime_Det-AVG
Max Hold [dBm]= -128.66
AVG [dBm]= -134.14
delta [dB]= 5.48
——–
Sweep_Det-AVG
Max Hold [dBm]= -127.69
AVG [dBm]= -137.62
delta [dB]= 9.93
——–

As can be seen, there is big inconsistency between Sweep and Realtime Analysis Modes ranging between -0.97 to +6.24dB such as:
delta maxRT_Max-AVGRT_Max [dB]= 5.68
delta maxRT_AVG-AVGRT_AVG [dB]= 3.21

delta maxSW_Max-AVGSW_Max [dB]= 1.27
delta maxSW_AVG-AVGSW_AVG [dB]= 0.45
——–
delta maxRT_Max-maxSW_Max [dB]= 3.44
delta maxRT_AVG-maxSW_AVG [dB] 6.24
delta AVGRT_Max-AVGSW_Max [dB] -0.97
delta AVGRT_AVG-AVGSW_AVG [dB] 3.48

How can you explain this behavior?
From my perspective, one cannot use the analyzer for consistent measurements with different modes and detectors having more than 7dB tolerance.
In the specs the analyzer amplitude precision readings is less than 2dB so what is wrong?

Look forward hearing from you.
BR,

Cristin