Tom Rondeau wrote:
> On Tue, Apr 19, 2011 at 2:35 PM, ish13 <address@hidden
>> 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
>> smaller value.
>> I also had it set up with the interpolation to 512 and the decimation to
>> but it didn't work either. Though I will set these values to the range
>> has to fall between.
>> As for the transmitter, I had connected the output of the modulation
>> to a scope to see if it was transmitting the correct waveform, which it
>> 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.
> Just connecting to the scope inside the transmitter isn't likely to tell
> 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 Rondeau wrote:
>> > On Tue, Apr 19, 2011 at 2:03 PM, ish13 <address@hidden
>> >> 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
>> >> it
>> >> and tell me if it is correct?
>> >> Thanks
>> >> Ismael
>> >> http://old.nabble.com/file/p31434999/Receiver.png
>> >> http://old.nabble.com/file/p31434999/Transmitter.png
>> > A few issues. First, don't set the multiplier to 32k as you will
>> > 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
>> > 4k
>> > and 2k, respectively. You cannot use this large of a number. The max
>> > recall) are 512 for interp and 256 for decim.
>> > It's also helpful to start the transmitter and use the usrp_fft.py
>> > to make sure you are receiving what you think you are receiving.
>> > Tom
>> > _______________________________________________
>> > Discuss-gnuradio mailing list
>> > address@hidden
>> > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>> View this message in context:
>> Sent from the GnuRadio mailing list archive at Nabble.com.
>> Discuss-gnuradio mailing list
> Discuss-gnuradio mailing list