Just out of curiosity, was there a design decision made to not use the DAC PGAs to adjust Tx gain? On Sat, 2010-01-16 at 09:08 -0800, Josh Blum wrote: > On 01/16/2010 01:36 AM, amarnath alapati wrote: > > hi friends, > > When I tried to print the Transmitter gain range by the following > > commands, > > The output is as followss, > > > > [r...@localhost digital]# python benchmark_tx.py -f 2412M > > --show-tx-gain-range > >>>> gr_fir_fff: using SSE > > Tx Gain Range: minimum = 0, maximum = 0, step size = 1 > > > > 1) Why is the gain Minimum and Maximum showing the same 0? > > The daughter board which you use, has no configurable transmit gain. > > > 2) How to control the transmit power ? Should I use the --amplitude command? > > This is the amplitude of the digital samples going into the usrp2 > device. You can use higher amplitudes, but be aware that if the > amplitude is too high, the samples will clip in the fpga dsp. The > maximum is 1.0 (this will clip). > > > 3) can some one breif me on the controlling of transmitter power issue? > > > > Use a mix of digital signal amplitude and programmable hardware gain to > control the transmit power within the usrp. In this case of your > daughter board, there is no configurable hardware gain > > -Josh > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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