Marcus,
Thanks for engaging in this. I will have frequency deltas for you first
thing this afternoon.
Mike
On 03/24/2019 03:07 PM, Marcus Müller wrote:
I can fully understand that! You don't happen to have an estimate for
that frequency offset's magnitude? Is it always the same drift? I'm
trying to narrow down analog vs numerical accuracy issues here.
Best regards,
Marcus
On Sun, 2019-03-24 at 18:39 +0000, Freedman, Michael - 1008 - MITLL
wrote:
It is not just a phase offset. It is a frequency offset. The phase
drifts between the two. I can tolerate a phase offset at startup. A
freq offset however is causing problems.
Mike
Sent from my iPhone
On Mar 24, 2019, at 4:28 AM, Marcus Müller <marcus.muel...@ettus.com>
wrote:
Can you elaborate on what "not coherent" means to you – the relative
phase should be constant after each tune, but if you don't tune
simultaneously, i.e. with timed commands, random at each tune.
Best regards,
Marcus
On Sat, 2019-03-23 at 17:06 -0400, Michael R. Freedman via USRP-users
wrote:
Hello,
I have an issue where I tune both the TX and RX side of a UBX40
card
in
an X310 to the same frequency and find that the transmitted signal
and
what is received are not coherent. I am using an external 10MHz
reference and have tried the documented suggestions.
at 150MHz it is coherent.
at 155MHz it is NOT coherent.
I have tried setting the dboard_clock_rate to 20MHz. This made
the
problem appear at 150MHz as well. I've tried integer_n tuning.
I have verified that the ref_lock and lo_lock are both true.
Any suggestions?
Mike
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
