How can I read data(amlitude signal) from spectum analyzer HP8563E Using GPIB NI-488.2AND labview 6.

[Rob Cole]

I was working with this just today. Download (from the NI site) the file for: hp8563e.llb. Then just run the application that I have attached. Since the data is in an array, you can just use the Array Max/Min VI to get the maximum amplitude. The VI prints to the default printer in your system.

Rob

[digital]

Hi Rob,

When I want to run this VI "8560_display_trace_2.vi". Labview didn't find this VI "Change to Engg Note.vi". I tried to find it, unfortinately I couldn't find this VI. Of course I couldn't run the above VI.

Could you please tell me how can I run your VI.

Second question, How do I to put frequency sampling of my signal of interest (the frequency of my signal is 900 MhZ). So I want to put Fs equals to 3 time the frequency of my signal.

Regards,

[Rob Cole]

Sorry, I didn't think that I had used any of my custom library functions in that VI. I have attached the missing VI here.
The 8563e library has functions for setting the frequency span (GPIB command FS ). Try the HP8563e Config Span.vi. The speed of screen refresh and signal acquisition is a function of your span and your bandwidth. You can also use the HP8563e Config Sweep.vi to set your sweep time.

Hope this helps.

Rob

[digital]

Hi Rob,

I've run your application.

Before I ask my question I prefer explain you what I going to do exactely.

I want to make measurement of radio coverage along road by using my vehicle. The sweep time of 8563e is 50ms. So with this sweep time I can only make 1 point measurement each 50 ms. The signal of interest frequency is 900 Mhz (11.8 inch). According to Shannon theorem I want to read 1 point each 4 inch.

So, according to my sweep time 1 point each 50ms this equivalent to 20 points each 1 second.

So, 20 points* 4 inch = 80inch each 1 second.

So,the speed of my vehicle must be not more than 80 inch/s.

So, to do this work I think I have just to improve the Query Amplitude.vi. Because I Need just to read 20 points o
f peak amplitude each 1 second. Unfortunately I couldn't do that work because when I run Query Amplitude.vi the peak amplitude output in labview and in the spectrum analyzer take more time to change to a new amplitude value provided bu my signal generator.

My question is :

Ho can I do using just the Query Amplitude.vi to read peak amplitude as fast as possible ( for example 20 point each 1 second).

Thank you in advance for you help.

[iconpro]

I would like to know if you have a VI that allows me to change the amplitude from volts to watts?