rtl-sdr with bias T

Patrick Strasser-Mikhail patrick at wirklich.priv.at
Fri Feb 9 07:06:47 UTC 2018


Hi!

With 'git bisect' you can possibly track this down to a single commit.

BR

Patrick

Am 8. Februar 2018 10:36:26 MEZ schrieb Cinaed Simson <cinaed.simson at gmail.com>:
>On 02/07/2018 12:25 AM, Bill Gaylord wrote:
>> This has to do with the ordering of the set bandwidth function I
>believe. (From my experience with it.) because you can set the
>bandwidth before the freq is set the chip thinks you are trying to do
>stuff before the PLL is locked. Which is actually true. But this has no
>real effect on the usage of device from what I can see. 
>
>Thanks for the reply.
>
>In my case, when I use version v0.5git, I can only located 2
>independent
>GSM channels.
>
>But when I use v0.5.3, I can locate 13 independent GSM channels.
>
>I'm using a R820T from noelec
>
>  https://www.nooelec.com/store/nesdr-smart-sdr.html
>
>I'll make sure I can reproduce the problem on Friday.
>
>
>-- Cinaed
>
>
>> 
>> 
>>> On Feb 6, 2018, at 10:53 PM, Cinaed Simson <cinaed.simson at gmail.com>
>wrote:
>>>
>>>
>>> Hi - there appears to be problem with rtl-sdr with bias T and the
>>> RTL2832U OEM Rafael Micro R820T tuner.
>>>
>>> I get PLL errors when I try to calibrate it using kal - or when I
>use
>>> rtl_test.
>>>
>>> Using device 0: Generic RTL2832U OEM
>>> Found Rafael Micro R820T tuner
>>> Exact sample rate is: 270833.002142 Hz
>>> [R82XX] PLL not locked!
>>> Setting gain: 33.8 dB
>>>
>>> And I get the same error PLL when I run rtl_test.
>>>
>>> If I back out of the latest git version to v0.5.3 it works correctly
>- I
>>> can calibrate the dongle using kal and run rtl_test without any PLL
>errors.
>>>
>>> This is a known problem?
>>>
>>> -- Cinaed
>>>
>>>
>> 

-- 
Diese Nachricht wurde von meinem Android-Gerät mit K-9 Mail gesendet.
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