On 08/15/2020 11:59 PM, Koyel Das (Vehere) wrote:
No it doesn’t look better again after reducing gain. Sometimes the
phase differences are closeby but not so same as we were getting
before and most of the times they are totally incorrect. Strength of
the signal when we tried with maximum gain was near -40 dbm.
Regards,
Koyel
To clarify some things.
(A) The phase errors are just the initial phases--they don't wander
around with respect to one another during a run?
(B) What frequency range?
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------------------------------------------------------------------------
*From:* USRP-users <usrp-users-boun...@lists.ettus.com> on behalf of
Marcus D. Leech via USRP-users <usrp-users@lists.ettus.com>
*Sent:* Sunday, August 16, 2020 12:25:37 AM
*To:* usrp-users@lists.ettus.com <usrp-users@lists.ettus.com>
*Subject:* Re: [USRP-users] Incorrect data from usrp 2955
On 08/15/2020 01:16 PM, Koyel Das (Vehere) via USRP-users wrote:
Hi,
We are using USRP 2955. Something has gone wrong. Before we were
getting constant phase difference across channels for limited
bandwidth and with time when we split single antenna signal using
splitter and fed two channels of USRP but now it is not doing so.
This happened on Friday that after getting a series of correct
results : constant phase difference across channels by feeding
signal using splitter as mentioned above, we suddenly started to
receive wrong data: random phase across channels and with time using
the same setup with splitter. The thing we did was setting gain to
near maximum and receiving 100 MHz sample rate. But I don't think
amplifier has damaged because in this usrp we have four independent
channels and when we connected the splitter to unused channels then
also we got wrong data. What can go wrong that USRP is streaming data
but phases are wrong? What do you think? Please let me know.
Regards,
Koyel
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Does it look better again when you reduce the gain?
What is the magnitude of the signals going to the RX ports?
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