On 03/14/2019 04:37 PM, Damon wrote:
Hi Marcus,
The UHD Version is v3.14.0.0-rc1.
Best regards,
Damon
I don't see this issue at all, using v3.14.0.0-rc3
How are you measuring phase, what does you flow-graph look like? Have
you increased the gain enough to assure that the inherent system
noise is not dominating your phase measurements?
Hi Ali,
The daughterboards have their own clock generators, but they are not
exactly 'independent'. At least they don't have to be, as they share
the
same reference clock. Look at the block diagram:
https://kb.ettus.com/images/9/9d/USRP_N310_N300_DB_Schematic.pdf
and "Ref Clock" block. I don't have N310 and I know that reality can be
a bit far from expectations (i.e. look at my "What makes sense and what
doesn't in the way carrier frequency is set for TwinRX currently?"
post).
But maybe the daughterboards can be configured to use that reference
clock.
Best Regards,
Piotr Krysik
The LMK clock generator uses the reference clock from the mainboard, so
there should not be any mutual phase-jitter/drift issues. I can test
this
on my N310 in the coming day or two.
What version of UHD is in use?
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