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Re: [Discuss-gnuradio] Tune UHD - as fast as possible

From: Marius
Subject: Re: [Discuss-gnuradio] Tune UHD - as fast as possible
Date: Sat, 11 Feb 2012 11:50:51 +0100


On 10 February 2012 18:12, Marcus D. Leech <address@hidden> wrote:
> Ive used XMLRPC for the same thing and you don't have to worry about 
> unpacking integers into floating point etc

Ah, the XMLRPC block automatically adds callback functions for the
variables. That's a great startpoint. Thanks a lot. Now I finally know
why someone would need an XMLRPC in DSP ;)

> On Feb 10, 2012, at 10:49 AM, Ed Criscuolo <address@hidden> wrote:
>> Use an external program to send a UDP packet to the port number
>> of the UDP source block.  The packet should contain a single
>> integer representing the frequency.  Pay attention to byte-order.
>> I've used this setup to apply doppler correction from an external
>> program when receiving telemetry from a spacecraft.  We were only
>> sending packets about once per second, so I don't know how fast
>> this setup will go, but it's worth pursuing.
>> @(^.^)@  Ed

I hope it doesn't add any latency to the equation like: RPC command +
UHD command + FPGA reaction + RF frontend. I'm not even sure if using
the C++ API would be any different. So my Monday morning experiment
now is set ;)


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