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On Jul 31, 2008, at 12:15 PM, Wireless Monster wrote:
All,
I've been trying to set both Tx and Rx to the same frequency and
sending a sinusoid to try to measure the frequency offset, but it
does not seem to work... it looks like as both Tx and Rx are driven
by the same clock, the frequency the offset gets compensated on the
Rx signal so it can not be measured... (???)
Anyone has any clue on how to measure it dynamically at the code
startup?
You have to measure frequency offset between different crystals --
e.g., 2 USRPs. There's no way to calculate an absolute. Maybe if you
have the RFX version where each DB has (and uses) its own crystal you
could do this between two DBs on the USRP, but this would still only
be their relative offsets.
- -Dan
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