RF power problems with current master of osmo-trx

Andreas Eversberg andreas at eversberg.eu
Fri Jan 24 09:29:50 UTC 2014


hi,

i experience problems with osmo-trx/umtrx. when i start osmo-trx, i get 
the following output:

openbsc osmo-trx # /files/projects/gsm/osmo-trx/Transceiver52M/osmo-trx
linux; GNU C++ version 4.5.4; Boost_104900; UHD_003.004.000-1b07671

Config Settings
    Log Level............... NOTICE
    Device args.............
    TRX Base Port........... 5700
    TRX Address............. 127.0.0.1
    Channels................ 1
    Samples-per-Symbol...... 4
    External Reference...... Disabled
    Diversity............... Disabled

-- Opening a UmTRX device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
-- Setting UmTRX 4 SPS
-- Transceiver active with 1 channel(s)

i use current master. (an older version with branch umtrx_dual_test 
works with two TRX.) when i use RSSI test phone, i see that the RF power 
is high on TS0 and TS1 only. also it takes many tries to sync to it. i 
receive BCCH infos with some dropouts, but RACH is not received.

i have no slotmask define at osmo-bts. any idea what causes it?

regards,

andreas






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