Speed of Peak Freq Measurements

Hi. My name is Raja. I have written a application using Visual Studio 2010 (VB).
I am able to get the peak frequency based on the formula as provided by Andrew.
However, i have 2 issues.
1. I need to do 2 sweeps per trim value to get an accurate reading.
2. time taken per sweep is not acceptable to my customer.

Is there any suggestions/recommendations as to how I can improve this?

Thank you
Raja

Hi Raja,

The configuration of the receiver plays a big part in the sweep speed. The biggest factors that affect sweep speed on the SA44 is span, rbw, and image/spur rejection. Using Spike, a span of 200k-500k, 1k RBW, and image rejection off, I was able to achieve a sweep speed of around 22ms. I suspect this is about as fast as the API will give you sweeps.

It would be necessary to know your measurement requirements before I could determine whether the SA44 could meet them.

You could increase measurement speed by utilizing the IQ data stream, but this would then require more signal processing (FFTs, etc.).

Regards,
Andrew

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