On 09/28/2018 12:45 PM, Yun Li via USRP-users wrote:
Hi there,
I am testing external LO on N310 (UHD_3.13.0.2-1-g78745bda). The setup
is I have a X310 sending SINE waves to N310's channel 1,2,3 via a
splitter. A signal generator sends 2x frequency 3dBm signal to N310's
LO IN 0/1 and LO IN 2/3 via a splitter. According to the doc, there is
supposed to be a 180 degree phase shift which I did observe in
following plot.
image.png
But the question is why all 3 channels are now having very different
amplitude. If I use internal LO, the amplitude of all 3 channels are
the same.
Thanks.
Yun
What happens if you increase the LO power by 1dB or so?
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