Re: [Discuss-gnuradio] sweep generator

[Marcus D. Leech]

On 04/28/2016 06:46 PM, Chris Kuethe wrote:
> 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.
One thing to keep in mind is that the B2xx tuner chip isn't really good 
at fast frequency changes--think of 10s of miliiseconds as roughly how long
  it takes to reliably re-tune.

However, 50MHz/sec with 20Mhz swaths shouldn't be hard at all.