[Openbts-discuss] Not Tuning at 1800

[Andrew B. <and...@gm...>]

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