Hmm I agree a cleanup is necessary. Will get back.
Thank you guys. On Wed, Feb 27, 2019 at 13:47 Michael Dickens <michael.dick...@ettus.com> wrote: > I'll second what Marcus said: a little tidier GRC flowgraph would help. > > That said, it looks like you're using nice and simple GR OFDM for Tx and > then you've expanded the GR OFDM Rx into its hier block equivalent form ... > then connected the output to PER and BER blocks and output those results to > the Qt GUI. I can't say for certain that all of the parameters are "stock", > but those I can see look like they are. Is this correct? > > What I'm wondering is where you're seeing the "55db drop in the signal" > you specifically note? GR's default OFDM has zeros in the frequency > spectrum in some locations. I don't see anything specifically "wrong" nor > "out of place" with the spectrum you posted, but since this is just a > screenshot it's difficult to tell what's going on beyond that it's an OFDM > waveform. Hence my query to what exactly you're referring. > > Hope this is useful! - MLD > > On Wed, Feb 27, 2019, at 1:32 PM, Müller, Marcus (CEL) wrote: > > Hi Nishant, I'm afraid you'll have to first tidy up your flowgraph. > I've been staring at it for a while, and it's just too confusing. > > Best regards, > Marcus > > On Wed, 2019-02-27 at 11:41 -0500, Sai Parepalli Laxman wrote: > > Hello, > > > > This is Nishant. > > > > I have a pair of N210 USRP modules and two pairs of LFTX/LFRX daughter > boards. I have an unexplained 55db drop in the signal where a signal with > amplitude bounded between -1 to 1, shows a -30db peak rather than a 0 dB > peak on Qt GUI Frequency Sink and I am wondering if the amplifier is wrong > or something that I am not doing right. > > > > I am using Ubuntu 18.04.1 gnuradio version 3.7.11 and UHD_003.010.003.000 > > > > I have attached the flowgraph and the transmitter output below. > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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