Re: PLL Carrier tracking

That depends to which frequency you set your SDR receiver – you probably want to tune
"off" a bit, to not have DC/LO Leakage. So, if you, say, tune to 90.2 MHz, your signal of
interest would be at -200 kHz, which is 1/5 of the sampling rate.

The way you calculate the parameters in that case is pretty detailedly written down on the
page linked from the block's "documentation" tab:

https://wiki.gnuradio.org/index.php?title=PLL_Carrier_Tracking

If the page leaves any questions open, do not hesitate to follow up!

Best regards,
Marcus

On 1/30/25 5:37 PM, Muhammad Anas wrote:
> Dear GNU Radio Community,
>
> I am attempting to demodulate an AM signal with a carrier frequency of 90 MHz and a
> message signal frequency of 90 Hz.  The sampling rate is 1 MS/s.  I am utilizing a PLL
> carrier tracking, but I require clarification regarding the appropriate configuration of
> its parameters. Specifically, I am unsure how to determine the "center frequency" and
> "frequency variations to track" parameters, expressed in radians per sample, as detailed
> in the GNU Radio PLL carrier tracking tutorial.  Could you please provide guidance on
> calculating these parameters for my specific signal characteristics?
>
> Best regards
> Muhammad Anas
>