Re: [Discuss-gnuradio] RF Analysis

[John Ackermann N8UR]

I suspect the original poster was looking for something a little more 
sophisticated, but since Richard mentioned using a c program an visa, 
I'll mention the linux-gpib project which provides drivers and a 
more-or-less NI compatible library to talk to GPIB cards from several 
vendors.  I've written several programs in Perl to talk to older (ie, 
sort-of-hobbyist-affordable) HP gear like spectrum analyzers and 
frequency counters.  They're on my website under 
http://www.febo.com/geekworks, but are sort of scattered around and hard 
to find.  Contact me offline for more details if you're interested.

John
----

Richard Cagley wrote:
> If you have a GPIB card, you can use a simple program like this to log data
> points in a range of spectrum. This was for an HP spectrum analyzer, but if
> you're using visa it shouldn't matter.
>
>
> // SpectrumSurvey.cpp : Defines the entry point for the console application.
> //
>
> #include "stdafx.h"
> #include <visa.h>
> #include <windows.h>
> #include <iostream>
> #include <fstream>
>
> using namespace std;
>
> int _tmain(int argc, _TCHAR* argv[])
> {
>   ofstream OutputFile("spectrum.dat", ios::out);
>
>   if (!OutputFile)
>   {
>     cerr<<"File could not be opened"<<endl;
>     return -1;
>   }
>
>   ViSession defaultRM, vi;
>   char buf [256] = {0};
>   char buf2 [256] = {0};
>
>   // set the parameters for measurement: in kHz
>   int StartFreq = 210000;
>   int StopFreq = 240000;
>   int StepFreq = 25; 
>   int NumberRuns = 1;
>
>   // write out the frequencies in the header
>   int CurrentFreq = StartFreq;
>   while (CurrentFreq < StopFreq)
>   {
>     OutputFile<<CurrentFreq<<", ";
>     CurrentFreq += StepFreq;
>   }
>   OutputFile<<endl;
>
>   // Open session to GPIB device at address 18
>   viOpenDefaultRM (&defaultRM);
>   viOpen (defaultRM, "GPIB5::18::INSTR", VI_NULL,VI_NULL, &vi);
>
>   viPrintf (vi, "ID?\n");
>   viScanf (vi, "%t", &buf);
>   printf ("Instrument identification string: %s\n", buf);
>
>
>   double ChannelPower;
>   // main loop to do measurements
>   for (int n = 0; n < NumberRuns; ++n)
>   {
>     CurrentFreq = StartFreq;
>     while (CurrentFreq < StopFreq)
>     {
>       viPrintf( vi,"IP;SNGLS\n");
>       viPrintf(vi, "FA %dMHZ\n", CurrentFreq);
>       viPrintf(vi, "FB %dMHZ\n", CurrentFreq+StepFreq);
>       viPrintf(vi, "CHP\n");
>       Sleep(1000*10);
>       viPrintf(vi, "*CHPWR?\n");
>       viScanf(vi,"%lf",&ChannelPower);
>       OutputFile<<ChannelPower<<", ";
>       CurrentFreq += StepFreq;
>     }
>     OutputFile<<endl;
>   }
>
>   viClose (vi);
>   viClose (defaultRM);
>   
>   return 0;
> }
>
>
> > -----Original Message-----
> > From: address@hidden [mailto:discuss-
> > address@hidden On Behalf Of SIGINT Admin
> > Sent: Wednesday, May 11, 2005 9:03 AM
> > To: address@hidden
> > Subject: [Discuss-gnuradio] RF Analysis
> >
> > Hi
> >
> > I was wondering if any of you guys had links or pointers to general
> > good quality RF analysis and logging software?
> >
> > Ideally it would be compatible with the likes of the gnu radio
> > hardware, but could also be interfaced to drive an agilent spectrum
> > analyser or similar....
> >
> > Any tips or thought welcome
> >
> > Many thanks
> >
> > Mochara
> >
> >
> > _______________________________________________
> > Discuss-gnuradio mailing list
> > address@hidden
> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
>
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