Re: [Openbts-discuss] Not Tuning at 1800

[Harvind S. <hs...@ke...>]

Just to make sure, you've also made the necessary hardware changes to
the USRP and have a 52MHz oscillator?

--- Harvind

On Mon, 2010-11-15 at 11:01 +0000, Andrew Barlow wrote:
> Hello,
> 
> I am using an USRP from Ettus with Flex 1800 Rx and Flex 1800 Tx
> boards.
> 
> I'm also running latest GNU-Radio and OpenBTS software compiled by
> hand. I also made the changes to the source code for the timing as
> suggest here:
> http://gnuradio.org/redmine/wiki/1/OpenBTSClockModifications
> 
> So, OpenBTS runs happily... and I can even connect mobiles to it when
> running 52M transceiver mode with the GSM.Band setting at 850.
> 
> However, if I put it on 900 or 1800... it doesn't work at all.
> 
> Here is the output on the 850 band:
> 
> Starting the system...
> 1289818145.4508 FORCE 139746679404320 Logger.cpp:109:gSetLogFile:
> setting log path to test.out
> 1289818145.4512 ALARM 139746679404320 OpenBTS.cpp:129:main: OpenBTS
> starting, ver 2.6.0Mamou build date Nov 11 2010
> 1289818145.4552 FORCE 140633529018144 Logger.cpp:194:gLogInit: Setting
> initial global logging level to NOTICE
> 1289818145.4553 FORCE 140633529018144 Logger.cpp:109:gSetLogFile:
> setting log path to test.TRX.out
> 1289818150.866954 139746679404320: 
> 
> 
> 
> And here is the output on the 900 or 1800 band:
> 
> Starting the system...
> 1289818215.1912 FORCE 139866064344864 Logger.cpp:109:gSetLogFile:
> setting log path to test.out
> 1289818215.1917 ALARM 139866064344864 OpenBTS.cpp:129:main: OpenBTS
> starting, ver 2.6.0Mamou build date Nov 11 2010
> 1289818215.1956 FORCE 140553740953376 Logger.cpp:194:gLogInit: Setting
> initial global logging level to NOTICE
> 1289818215.1958 FORCE 140553740953376 Logger.cpp:109:gSetLogFile:
> setting log path to test.TRX.out
> 1289818220.2201 ALARM 140553741047568
> Transceiver.cpp:551:driveControl: TX failed to tune
> 1289818220.2206 ALARM 139866064344864 TRXManager.cpp:349:tune: TXTUNE
> failed with status 1
> 1289818220.744882 139866064344864: 
> 
> 
> Something obviously isn't working. OpenBTS DOES stay open but mobiles
> cannot connect. I even tried the flashing technique using db-eeprom
> (forget the exact name) the 900 and 1800 but nothing worked.
> 
> Does anyone have any ideas as to what this might be?
> 
> Thank-you kindly.
> 
> Andrew Barlow
> 
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