Slow data acquistion E4440A Agilent Spectrum Analyser

Hi guys,
I have currently using E4440A SA. I have used LabVIEW 8.0 with the instrument drivers provided at NI. Currently, I have some problem whereby the acquistion for per trace data was set at 1 sec from the wait for operation complete vi. This pose a problem to me as there is a loss of real time data. Henceforth, i have changed to about 40 msecs where my sweep time was 36.87 msecs. The hardware SA tends to hang after running for about 3 hours continuously.
I sincerely seek help to enquire how can I achieved in getting the real time data, without setting the wait for operation vi as I believed the SA hangs was due to the setting. Thanks a lot.
Rdgs
Chew

Hi Chew,
I had a look at your code.  Correct me if I'm wrong in my understanding...
The outer loop configures the SA for every group of 9 samples which are then saved if "Peak & Noise" is selected.
Do you actually want to configure the SA at every interval of 9 samples?  Are you doing this so that you don't need to stop & restart the application when you want to change your settings?  Every time you start a new set of acquisition, it will take extra time just to setup the instrument, which may be un-necessary if you continuously take samples without changing the settings (Spa, VBW, RLev, Log).
If so, there is an architecture to avoid that situation.
Why do you have 99ms delay in the inner loop?  There is no reason for such a delay.  Since it is reading the trace within the loop, it will take some time to execute each iteration, so no need for extra wait time.  You could put a value of 0ms or 1ms to allow the processor to tend to other tasks, but that may not be an issue anyway.
R

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