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.
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