Try to clone and compile osmo-trx from: git clone git://git.osmocom.org/osmo-trx git checkout achemeris/umtrx-fixes 20 сент. 2014 г. 18:20 пользователь "Arif" <[email protected]> написал:
> Ivan Kluchnikov <Ivan.Kluchnikov <at> fairwaves.ru> writes: > > > > > > > Hi Yavuz, > > Try to use achemeris/umtrx-fixes branch for osmo-trx. > > Also check that you use the latest version of UHD from > https://github.com/fairwaves/UHD-Fairwave > > If you have old version of FPGA and ZPU, flash current FPGA and ZPU > images: http://umtrx.org/hardware/flashing/ > > 18 сент. 2014 г. 21:49 пользователь "Arif" <arif.i84 <at> gmail.com> > написал:Yavuz Mert <yavuzmertt <at> gmail.com> writes: > > > > > > Hi, > > > I have a problem setting tx power in osmo-trx. I debugged and found > > that > > > correct gain value is passed to uhd_device::setTxGain. But whatever > > value is > > > set to usrp_dev->set_tx_gain, usrp_dev->get_tx_gain(chan) returns > -28 > > db. > > > In uhd_device::setTxGain(double db, size_t chan) I put a printf to > > see > > > values. > > > > > > usrp_dev->set_tx_gain(db, chan); > > > tx_gains[chan] = usrp_dev->get_tx_gain(chan); > > > printf("Written %f, read %f\n", > > db,tx_gains[chan]);fflush(stdout); > > > > > > Written 21.000000, read -28.000000 > > > Written 11.000000, read -28.000000 > > > Written -35.000000, read -28.000000 > > > > > > But despite the read values, actually the power is somewhat changed. > I > > plugged > > > TX1 to spectrum analyzer and set TX gain from -35 to 21 in 2 db > steps. > > Until > > > -5 db the signal gradually increases, but from -5db to -3db it drops > > down to > > > lowest. Is there something I should pay attention while using higher > > gain > > > values. Meanwhile I do not play with RX gain or noise level, leave > > them at > > > default values. > > > > > > thanks > > > yavuz > > > > > > > > Hi, > > i am facing the same issue, and have spend the whole day to find that > > tx_gain value is not set no matter what. the output signal only > > registers maximum of 1.6 dBm on watt-meter. > > Temperature is not high so i doubt temperature is a problem. may be > its > > related to uhd driver? or tx_gain values not written to eeprom. > > i might be missing some configuration option or trick. any help is > much > > appreciated, > > thanks, > > arif > > > > > > > > Hello Ivan, > > thank you replying cause i'm having same problem. i flashed current > version of ZPU and FPGA images. > > then again i ran the test using following command > > tx_samples_from_file --rate 1083333 --freq 9550e5 --bw 1500000 --file > multiframe_norm.dat --type float --loop--gain 18 --subdev A:0 > > but still i see the same actual tx gain: -28.0000 dB.. > > i couldn't find the achemeris/umtrx-fixes branch for osmo-trx. Further i > have cloned the latest code from uhd-fairwaves as well. > > thanks, > arif > > > >
