I was testing on 3.11.0, but im back on maint and it looks like the code is the same.
On Thu, Jun 14, 2018 at 9:39 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > On 06/14/2018 04:57 PM, Keith k wrote: > > Hey Marcus > > Okay, we looked into this and realized that the rx_samples_to_file program > has a bug. When you set the channel, it doesnt tune the center frequency of > the desired channel which is why the amplitudes are off. Anything other > than the first channel is at DC. Finding this bug led me to a similar issue > in my code which let me resolve my problem. Thanks. Is this list the place > to report bugs? Thanks. > > Yes, thanks. > > What version of UHD? > > Just so it doesn't get "already fixed". > > > > On Thu, Jun 14, 2018 at 5:45 PM, Marcus D. Leech via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> On 06/14/2018 01:30 PM, Keith k via USRP-users wrote: >> >>> Hello all >>> >>> I noticed in my testing that I am seeing significant mismatch in >>> amplitude on each channel of my N200(lfrx db) with the second channel being >>> much weaker. I thought that it was a problem with my code, but when I hook >>> up a signal generator and split to both RX ports and use the >>> rx_samples_to_file example, I still see a clear difference as shown in the >>> quick plot. >>> >>> ./rx_samples_to_file --args="addr0=192.168.10.112" --file="samples.dat" >>> --type="float" --duration 1 --rate 5e6 --freq 13e6 --subdev="A:A A:B" >>> --channel 0 --ref="external" >>> >>> ./rx_samples_to_file --args="addr0=192.168.10.112" --file="samples2.dat" >>> --type="float" --duration 1 --rate 5e6 --freq 13e6 --subdev="A:A A:B" >>> --channel 1 --ref="external" >>> >>> >>> However my colleague has his own set of gnuradio code, and when he ran >>> his example it produced a plot of similar amplitude. I can't see much of >>> what I'm doing different using C++ UHD vs his gnuradio code, but I'm not a >>> big expert here so I'm just looking for ideas. Thanks. >>> >>> >>> UHD version UHD_3.11.0.HEAD-0-g13c32cef >>> >>> >>> What subdev spec is your friend using in his flow-graph? Is it .GRC >> derived, can it be posted here? >> >> >> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> > > > > -- > -Keith Kotyk > > > -- -Keith Kotyk
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