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Alexander Chemeris alexander.chemeris at gmail.comOn Sat, Jul 13, 2013 at 8:39 PM, Thomas Tsou <ttsou at vt.edu> wrote: > On Sat, Jul 13, 2013 at 5:45 PM, Alexander Chemeris > <alexander.chemeris at gmail.com> wrote: >> What is the reason you disabled setting power attenuation an receive >> gain for the second trx? Since both channels in UmTRX are independent, >> it should be possible to control tx power and rx gain independently. >> >> In the "SETPOWER" command handler: >> if (mPrimary) >> mRadioInterface->setPowerAttenuation(dbPwr); > > The control interface was setup for OpenBTS, which does not make a > distinction between independent channel gain. So I locked both gain > settings to the primary channel (the one that initializes the device). > > For better osmo-bts usage, I split the gain settings in the same way > that we discussed for the tuning setting. Note that this breaks > OpenBTS usage, but that fix should really be in core and not the > transceiver. > > git://github.com/ttsou/openbts-p2.8.git umtrx_dual_test Well, since we don't control the core of OpenBTS, could we make the transceiver compatible with both ways? Also setting the Tx/Rx gains is a proper way for Multi-ARFCN version where ARFCN are actually on the same TRX. So we have to make this compatible with both ways anyway. E.g. we could introduce a new command to configure transceiver regarding TRXs. -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru