Re: Help on

On 2022-03-27 15:32, Marcus Müller wrote:
> Is 32k a supported sampling rate? Sounds two orders of magnitude too low.
The lowest RTL supported sampling rate is 250K, and then there's a jump
with no supported
  rates until something like 900K.

For a single WBFM channel, you need the 250K sampling rate.

The -11 error return is "LIBUSB_NO_MEM" coming from the within LIBUSB.

Not sure how to fix that, since I've never actually received that error.


>
> On 27.03.22 21:22, Lorenzo Mainardi wrote:
>> The error about PLL should be just "cosmetic" and not have any impact.
>> Anyway, I think I setup correctly both the correct frequency (I would
>> like to test the broadband FM, so 100e6) both the sampling frequency
>> (32k).
>> The real issue is the "Return code -11" error, I cannot find anything
>> about that.
>>
>> Il giorno dom 27 mar 2022 alle ore 18:52 Fabian Schwartau
>> <fabian@opencode.eu> ha scritto:
>>>
>>> Hi,
>>> did you set the correct frequency? If it is outside the allowed range,
>>> it is expected that the PLL cannot lock.
>>>
>>> Best,
>>> Fabian
>>>
>>> Am 27.03.22 um 18:46 schrieb Lorenzo Mainardi:
>>>> Hello everyone, I am trying to make a cheap USB dongle working with
>>>> gnuradio and gnuradio-companion.
>>>> I just tried to use a source block and link to a waterfall sink.
>>>> This is the error that I got:
>>>>
>>>> <<< Welcome to GNU Radio Companion 3.10.1.1 >>>
>>>>
>>>> Block paths:
>>>> /usr/share/gnuradio/grc/blocks
>>>>
>>>> Loading: "/home/lorenzo/Scaricati/fm_demod_mono.grc"
>>>>>>> Converting from XML
>>>>>>> Done
>>>>
>>>> Generating: '/home/lorenzo/Scaricati/top_block.py'
>>>>
>>>> Executing: /usr/bin/python3 -u /home/lorenzo/Scaricati/top_block.py
>>>>
>>>> gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.10.0.0
>>>> built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace
>>>> airspy airspyhf soapy redpitaya freesrp
>>>> Using device #0 Realtek RTL2838UHIDIR SN: 00000001
>>>> Found Rafael Micro R820T tuner
>>>> [R82XX] PLL not locked!
>>>> [R82XX] PLL not locked!
>>>>
>>>>>>> Done (return code -11)
>>>>
>>>> What does this mean? How can solve this problem?
>>>> The dongle is working fine with SDRSharp or rtl_fm.
>>>>
>>>> Thank you
>>>>
>>>
>>>
>>
>>
>