It is self-less.
Input signal 611.125MHz -30dBm
Anritsu MG3642A

Thank you for replying it last time.
After it was considered, I think I’ll make an application using Legacy APIs.

The question about the contents written on a manual of Legacy APIs Ver2012_01_05 thru 2012_09_7.

Because English is weak , I can not understand the contents of the instruction manual enough .
Please help understand it.

1. Setting with the FFT size
Are you OK with “16,32,54,128,256,512,——65535”?

2. calculation formula of RBW Are you OK with “RBW (Hz) = 1638400 / Decimation / FFT size”?
(This is the same value as the value that would be obtained in GetRBW ())

3. calculation formula of Data number of points.Are you OK with “Data Point number = 2.5 * SPAN (Hz) / RBW (Hz)”?

4. list covers two types calculation formula of the execution time.
Execute Time = 40+ (FFTsize × AvgCount × Decimation / 486) mS/slice — (1)
= Decimation * (stop – start) / 201kHz mS/slice — (2)

FFTsize = 1024, AvgCount = 8, Decimation = 1,start freq = 440.4MHz, stop freq = 440.8MHz
When I calculate on this condition

(1) Execute Time = 40+ (1024*8*1)/486 = 56.856 mS/slice
(2) Execute Time = 1*(440.8M-440.4M)/201k = 400k/201k=1.99 kHz?

The answers to be provided are different. Which is right?

5. setting panel of the Legacy API (Ver2.11A), only the setting of RBW is there, FFTsize and Decimation can not be set.
Does this software design is correct?

The RBW and FFTsize and Decimation, we understand that there is a relationship to each other.
However, in the Signal Hound (SA44B), please tell me the relationship of these three values.

6. When I call SHAPI_RunMeasurementReceiver(),
I construct five numerical value of “RFFrequency,AudioLPFreq,AudioBPFreq,UseLPF,UseBPF” across API.
However, it is set in the Measuring Receiver panel “IFBandwidth” does not pass.
Do not have a problem?

7. I make application to check an electric wave state of the fixed station (frequency 400MHz zone) of the specific small electricity now.
Because it is an electric wave of the fixation station, the data update speed does not have to be early.
SHAPI_LVC_ConfigureFast -> SHAPI_LVC_GetSlowSweep -> SHAPI_LVC_ConfigureFast -> SHAPI_RunMeasurementReceiver
Call the API in this order, it was continuous operation.
In the program that made the test, it has successfully operate.

Is there a possibility that the problem occurs in this way?

Regards.
zhubajei.

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