Re: [Discuss-gnuradio] 49MHz Rtl_sdr receiver

[Alexandru Csete]

On Thu, Sep 26, 2013 at 7:44 PM, William Pretty Security
<address@hidden> wrote:
> Hello list;
>
> I have been following a thread by Marcus and others about coherent
> receivers, etc.
>
> I have a question: Is it possible to change the clock frequency to receive a
> slightly lower frequency?
>
> I have some ~ 49.89MHz wireless mic’s that I would like to reuse, and an SDR
> seems like a cool solution.
>
> My current RTL dongle bottoms out at exactly 50MHz L Can I just change the
> clock or are their firmware issues as well?
>
> Right now if a try and set the frequency to say 45MHz, I get a “device not
> found” error from the Windoze software.
>

The clock has nothing to do with the RF range (not directly anyway)
since there is an integrated tuner that converts the RF to DC or a low
IF. Thew exact RF range depends on the tuner and if you get a device
with the R820T tuner it will work down to 24 MHz or so.

Alex