Re: [Discuss-gnuradio] Frequency offset for RTL-SDR

[Marcus Müller]

Dear Teja,

NEVER use a throttle block with a hardware source. In fact, I'd even
expect your GRC to warn you about that! [1]

Throttle does exactly **nothing** to the signal. It just slows down
(throttles) the processing, and hence will only lead to problems.

The RTL-SDR source has a "frequency correction" property, that you can
adjust.

However, what you'd normally do is use a frequency synchronization of
sorts. Which one is suitable for your signal depends on your signal of
interest itself – so, what is the signal you want to observe (not to
calibrate against)?

Best regards,

Marcus


[1]
https://wiki.gnuradio.org/index.php/FAQ#When_do_I_use_a_throttle_block.3F


On 04/23/2017 08:43 AM, saitejac6 wrote:
> Hello,
>
> I am using GNUradio from last week and i am having a RTL-SDR and my
> operating frequency is 403MHz. I am using a signal generator for correcting
> the frequency  offset. Can you please tell me what is process or method for
> frequency offset. In GNURadio i have used a RTL-SDR source, a throttle block
> and fft and time scope block to check the offset. can u help me with these
> blocks can offset be corrected? and how?
>
> regards
> Teja
>
>
>
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