1. Change tx-gain if you are using tunnel.py. The default value is set to the mid value. Use -h to find out more. 2. Spectrum analyzer would help you to observe. I believe you can also "calculate" based on your settings. Maybe someone can point out where in the code the bandwidth relationship is determined.
3. Not sure why. I thought someone had implemented a FH system. An On Wed, Jun 30, 2010 at 2:23 AM, Johnson_lu <[email protected]> wrote: > > Hi guys， > Could anybody can help me for these problems？ > 1、I varied Tx_amplitude from 0.1 to 1 and measured the output with a > spectrum analyzer. But the changes are very little. The output is almost > the > same when Tx_amplitude is 0.1 and 1. How can I reduce the transmit power > to > a very little value? > > 2、How do I know bandwidth of transmission and reception channels in > tunnel.py? > > 3、I am using an USRP2 with Gnu Radio and XCVR2450 as daughterboard. I want > to switch frequency among different channels 2.4G~2.5G. However, I find > that > switch only can succeed about 20 times, then fails. > The python code is: > self.tb.lock() > ok = self.tb.txpath.set_freq(new_freq) > if not ok: > print "Failed to set Tx frequency" > raise SystemExit > ok = self.tb.rxpath.set_freq(new_freq) > if not ok: > print "Failed to set Rx frequency" > raise SystemExit > self.tb.unlock() > > > -- > View this message in context: > http://old.nabble.com/Power%EF%BC%8CBandwidth-and-spectrum-switch-problems-tp29031239p29031239.html > Sent from the GnuRadio mailing list archive at Nabble.com. > > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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