Am going to work on it today and see if I get any results from the previous replys. Below the setting that are currently being used but I am changing the interpolation and decimation rates.
4k. Gain=20. Freq= 100.1MHz Board is tvrx Version 3.3 gnuradio and 0.7 grc Ismael Tom Rondeau wrote: > > On Tue, Apr 19, 2011 at 2:35 PM, ish13 <[email protected]> wrote: > >> >> Ok I had used the muliplier in a previous code using Frequency Modulation >> which is why I used it again. But thanks for that. I will change it to >> a >> smaller value. >> >> I also had it set up with the interpolation to 512 and the decimation to >> 256 >> but it didn't work either. Though I will set these values to the range >> it >> has to fall between. >> >> As for the transmitter, I had connected the output of the modulation >> block >> to a scope to see if it was transmitting the correct waveform, which it >> was. >> Though the problem came when I try to receive. When I tune into the >> frequency I am transmitting at there is no signal at all, which I am not >> sure why that is happening. >> >> Ismael > > > Just connecting to the scope inside the transmitter isn't likely to tell > you > too much. You want to see it at the receiver. The fact that you are not > seeing it at the receiver helps. > > What interpolation are you using at the transmitter when looking for the > received signal? > What gain settings? > What frequency? > What daughterboards are you using? > What version of GNU Radio and GRC? > > Tom > > > >> Tom Rondeau wrote: >> > >> > On Tue, Apr 19, 2011 at 2:03 PM, ish13 <[email protected]> wrote: >> > >> >> >> >> I am using DBPSK, but I am not receiving anything when I transmit my >> >> signal. >> >> I attached the flow-graphs from the companion. Can someone look >> through >> >> it >> >> and tell me if it is correct? >> >> >> >> Thanks >> >> Ismael >> >> >> >> http://old.nabble.com/file/p31434999/Receiver.png Receiver.png >> >> http://old.nabble.com/file/p31434999/Transmitter.png Transmitter.png >> >> >> > >> > A few issues. First, don't set the multiplier to 32k as you will >> probably >> > start to over drive the amplifier. I tend to keep this at a max of 15k. >> > >> > More importantly, though, you're interpolation and decimations are set >> to >> > 4k >> > and 2k, respectively. You cannot use this large of a number. The max >> (if >> I >> > recall) are 512 for interp and 256 for decim. >> > >> > It's also helpful to start the transmitter and use the usrp_fft.py >> program >> > to make sure you are receiving what you think you are receiving. >> > >> > Tom >> > >> > _______________________________________________ >> > Discuss-gnuradio mailing list >> > [email protected] >> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> > >> > >> >> -- >> View this message in context: >> http://old.nabble.com/Receiving-DBPSK-side-not-working.-tp31434999p31435221.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 >> > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://old.nabble.com/Receiving-DBPSK-side-not-working.-tp31434999p31451604.html Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
