Re: Signal Tracking

2019-11-26 Thread CEL 
Hi Sarandis,

you can change the center frequency of the osmocom source by calling
the appropriate setter function. In GRC, that is automatically done
when you change the variable that you used there, for example with a
slider.

Now, you seem to want to do that automatically: just write a bit of
python code with a for loop, and use it to modify your variable.

This is not a sample-accurate thing: the clock of your PC has not much
to do with the clock of your SDR device (whatever that is), so you need
to account very much for that.

"Video bandwidth" is a term that only applies to old-school
mixer/filter-based spectrum analyzers, not quite sure what you mean
with that here. There's no video.

Best regards,
Marcus

On Tue, 2019-11-26 at 18:38 +0200, sarandis. Doulgeris wrote:
> Hi. Is there a way to change the center frequency of osmocom source, having 
> the video bandwidth steady, automatically at a given rate istead of a range 
> variable?


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Re: Signal Tracking

2019-11-26 Thread Chris Kuethe 
One way you could do this is with a signal generator - proabably a slowly
increasing ramp signal - which you sample with a probe block, and then the
value of the probe block is used to retune the hardware. Not at my GR
machine right now otherwise I'd attach a flowgraph to show how to do this.

I'm sure there are other approaches.

On Tue, Nov 26, 2019 at 8:40 AM sarandis. Doulgeris <
sarandis.doulge...@gmail.com> wrote:

> Hi. Is there a way to change the center frequency of osmocom source,
> having the video bandwidth steady, automatically at a given rate istead of
> a range variable?
>


-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?

Signal Tracking

2019-11-26 Thread sarandis. Doulgeris 
Hi. Is there a way to change the center frequency of osmocom source, having
the video bandwidth steady, automatically at a given rate istead of a range
variable?