Re: [Discuss-gnuradio] Why cant I increase signal by 1 hz at a time with high frequencies?

[Marcus D. Leech]

On 09/07/2015 10:33 PM, Douglas Beonkey wrote:
> It seems that when I create a signal source block and try and view the
> signal on a waterfall plot or FFT plot, I can not increase the signal by
> a granularity of 1 Hz at higher starting frequencies.
>
> Example:
> If I create a signal source block with a starting frequency of 1.2 GHz,
> and in the block have a variable slider added to the frequency (assume
> the variable can slide between 0 and 1000), i must move the slider 120
> or more steps before the signal shifts on the waterfall plot with a gap
> of 120 or more hz.
>
> Is there a way to move the signal by 1 hz regardless of how high or low
> the signal source frequency is?
>
> Signal block screen shots attached.
>
> Attachments:
> http://www.ruby-forum.com/attachment/11103/Signal_Source_Block.png
> http://www.ruby-forum.com/attachment/11104/Signal_Increase_Hz.png
Using a signal source to produce a synthetic signal at 1.7GHz is simply 
not going to work, unless your sample-rate is 3.4GHz, which seems
  rather unlikely.

Normally in Gnu Radio, signals are represented in complex-baseband, 
leaving the hardware to move this up/down to the desired "on air"
  frequency.

Not sure what you're trying to accomplish, perhaps you could share a 
high-level overview?