Hi,

as far as I know, RTL-based dongles cannot deliver samples at 38.192 MS/s,
they are limited to 2.4 MS/s.

Best regards,
Carles








On Mon, Apr 9, 2018 at 3:14 PM, PRIYANKA PRIYADARSHINI <
priyankapriyadarshini...@gmail.com> wrote:

> Hi,
>
> Thank you for your response, I got your point. But I need to know this:
>
> I want to receive a GPS L1 signal (1575.42MHz) and I studied that the
> local oscillator of RTL-SDR has the intermediate frequency of
> 3.57MHz-4.57MHz. So when the signal with this IF goes to ADC of SDR, I want
> my ADC to sample this incoming signal at a sampling rate of 38.192MHz (as
> per the requirement). But when I try to put this sample rate in RTL-SDR, it
> starts dropping samples. I want to know that is there anything am I doing
> wrong OR it is the limitation of my RTL-SDR.
>
> Thank you.
>
> On Mon, Apr 9, 2018 at 11:57 AM, Carles Fernandez <
> carles.fernan...@gmail.com> wrote:
>
>> Dear Priyanka,
>>
>> According to https://www.rtl-sdr.com/about-rtl-sdr/ :
>>
>> The maximum sample rate is 3.2 MS/s (mega samples per second). However,
>> the RTL-SDR is unstable at this rate and may drop samples. The maximum
>> sample rate that does not drop samples is 2.4 MS/s, however some people
>> have had luck with 2.8MS/s and 3.2 MS/s working well on some USB 3.0 ports.
>>
>> Thus, something between 2.0 and 2.4 MS/s would work for you.
>>
>> Maybe this paper could be of your interest, although it is a little bit
>> outdated:
>> http://www.cttc.es/wp-content/uploads/2013/09/Turning_TV_int
>> o_GNSS_Rx1.pdf
>>
>>
>> Hope this helps,
>> Carles
>>
>>
>>
>>
>> On Mon, Apr 9, 2018 at 11:38 AM, PRIYANKA PRIYADARSHINI <
>> priyankapriyadarshini...@gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I am trying to receive GPS signal using RTL-SDR with GNU Radio. I am
>>> interested in L1 band of GPS signal (1575.42MHz). But I am confused about
>>> my sampling frequency. What value should I choose as samp_rate in RTL-SDR
>>> block of gnuradio?
>>>
>>> Thank you
>>> Priyanka
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> Discuss-gnuradio@gnu.org
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>
>
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