rtl-sdr with bias T

[Cinaed Simson]

On 02/08/2018 11:06 PM, Patrick Strasser-Mikhail wrote:
> Hi!
> 
> With 'git bisect' you can possibly track this down to a single commit.
> 
> BR
> 
> Patrick

Great - I was wondering how to do that without checking out every commit
since v0.5.3! Thanks.

-- Cinaed

> 
> 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
> 
> 
> 
> 
> 
> 
> -- 
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