Re: [Discuss-gnuradio] sweep generator

[Chris Kuethe]

You can do this with gnuradio-companion blocks.

Use a signal source block to generate a sawtooth wave, feed it into an
VCO block and dump its output into a probe signal (maybe call it
"ramp_out"). Then use a function probe (maybe call it "tuner_freq")
block to monitor the value of the probe signal, and use that as the
the center frequency for your rf sinks...  You might want to play
around with add const, multiply const, and throttle to generate new
tuning steps at an appropriate rate.

On Thu, Apr 28, 2016 at 3:34 PM, Richard Bell <address@hidden> wrote:
> Do you specifically not want to use uhd_siggen_gui when you say you want to
> use companion?
>
> If you were not aware of uhd_siggen_gui, type that into a command line and
> test it out. It can generate a sweeping tone if that's all you need.
>
> Rich
>
> On Thu, Apr 28, 2016 at 3:16 PM, Dan McKenna <address@hidden> wrote:
>>
>> Hi There,
>>
>> I am using a B210 to record band widths from 1 to 20 MHZ, center
>> frequencies from 400Mhz to 2 Ghz.
>> To test my post detection software I would like to use a Tx channel to
>> make a sweep generator as a real time test source
>> at sweep rates of around 50 Mhz/second over 1 to 20 mhz range with a
>> center frequency of 400 Mhz to 2Ghz.
>>
>> To be clear I wish to use companion to generate a frequency sweep at a
>> rate, defined by start/stop frequency and sweep time
>> or frequency, range, rate..... for example Freq 400 Mhz, range 2 mhz, rate
>> 50Mhz/second.
>>
>> Is this possible with the standard gnu radio companion block set?
>>
>> Thanks
>>
>> Dan
>>
>>
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>
>
>
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