Hi Marcus,
in the picture you see the power output of the signal generator is -30 dBm.
Changing it to -90 dBm does not produce any change in the received signal
except a (obvious) lower level.
There is not other amplifier between signal generator output and N200 input.
Luca
--
Ing. Luca Pascal
On 11.08.2015 09:38, Luca Pascale wrote:
> Concerning IQ imbalance how can I measure and compensate ? Using
> the calibration utility ?
Try running uhd_cal_rx_iq_balance and see if that helps.
Cheers,
Martin
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Hi Luca,
just to get a feeling
> Changing the power of the input signal does not change anything.
In your received signal, there seem to be high-power peaks. How large is
the digital signal amplitude during these?
Since the mirrored peak seems to be just a bit weaker, my suspicion
still is too
Hi Martin, Marcus,
I am using a N200 + WBX.
Gain set on the USRP is equal to 5 dB.
Changing the power of the input signal does not change anything. Moreover
the output of the signal generator is sent (via a 2way power divider) to a
spectrum analyzer and the input signal is ok.
I made some other t
Could be intermodulation due to driving the RX amplifier into nonlinearity;
Luca, what gain are you using? Can you further reduce it? Can you reduce
the amplitude of your test signal?
Best regards,
Marcus
On 10.08.2015 18:31, Martin Braun wrote:
> My first thought was "IQ imbalance", but it's pre
My first thought was "IQ imbalance", but it's pretty strong. Which USRP
and daughterboard do you have?
M
On 10.08.2015 09:24, Luca Pascale wrote:
> Hi all,
>
> why when I use:
> uhd::tune_request_t tr(tuningFreq);
> USRP_DEVICE->set_rx_freq(tr);
>
> I get a spectrum that is "mirrored" around t
Hi all,
why when I use:
uhd::tune_request_t tr(tuningFreq);
USRP_DEVICE->set_rx_freq(tr);
I get a spectrum that is "mirrored" around the tuninFreq ?
See: http://picpaste.com/sp-zJquS0qK.png
with tuningFreq = 149.8 MHz, input signal at F = 150 MHz (from signal
generator)
If I use a LO offset diff
