On 06/05/2019 07:34 PM, Dario Fertonani via USRP-users wrote:
Sorry, I wrote "coherent" meaning that the problems show up only with
signal analyses that go beyond power spectrum.
For example, the output LTE signal gives CQI=15 (max quality) with
dsp_freq=0 and variable CQI (never 15) with dsp_fr
Thank you Ron, you are right: results look better at lower bandwidths. I'll
try experimenting more.
On Wed, Jun 5, 2019 at 4:53 PM Ron Economos via USRP-users <
usrp-users@lists.ettus.com> wrote:
> I wonder if the 2X master clock rate may be an issue. I use offset tuning
> all the time on my B210
I wonder if the 2X master clock rate may be an issue. I use offset
tuning all the time on my B210, but at smaller sample rates and offsets
(10 Msps, 4 MHz offset and 4X master clock rate).
Maybe a test with 10 MHz LTE versus 20 MHz would be useful?
Ron
On 6/5/19 16:34, Dario Fertonani via USR
Sorry, I wrote "coherent" meaning that the problems show up only with
signal analyses that go beyond power spectrum.
For example, the output LTE signal gives CQI=15 (max quality) with
dsp_freq=0 and variable CQI (never 15) with dsp_freq = 11.52e6 (in all
cases sampling rate is set to 23.04e6 and ma
On 06/05/2019 07:12 PM, Dario Fertonani wrote:
Thank you Marcus. I should have mentioned that I tried removing that
line, with no success. With non-zero dsp_freq, the power spectrum
looks OK but the (coherent) signal quality is terrible.
OK, that's a different level of problem.
You're trying t
10 MHz is a lot of offset. The master clock rate probably needs to be 40
MHz or above.
Ron
On 6/5/19 16:12, Dario Fertonani via USRP-users wrote:
Thank you Marcus. I should have mentioned that I tried removing that
line, with no success. With non-zero dsp_freq, the power spectrum
looks OK but
Thank you Marcus. I should have mentioned that I tried removing that line,
with no success. With non-zero dsp_freq, the power spectrum looks OK but
the (coherent) signal quality is terrible.
On Wed, Jun 5, 2019 at 2:25 PM Marcus D. Leech via USRP-users <
usrp-users@lists.ettus.com> wrote:
> On 06
On 06/05/2019 05:20 PM, Dario Fertonani via USRP-users wrote:
I'm trying to move the "DC offset" out of the main spectrum by using
the dsp_freq field in uhd::tune_request_t. This doesn't seem to work
on B210, meaning that the following code functions properly
with DcOffset_Hz=0 but not, for exa
