Hi,
You can use decimation and a rational_resampler block.
If you really need to change the clock read this:
http://www.comsec.com/wiki?USRPClockingNotes
It explains how to use an external clock source with the usrp. I was able
to use a 38.4MHz clock with the usrp from a signal generator. It seemed to
work fine, so I bought a new 38.4MHz tcvcxo and installed it on the board.
I hope that helps you,
Hans
----- Original Message -----
From: "eenrti" <[EMAIL PROTECTED]>
Cc: "Matt Ettus" <[EMAIL PROTECTED]>; "Eric Blossom" <[EMAIL PROTECTED]>; "gnuradio
mailing list" <discuss-gnuradio@gnu.org>
Sent: Monday, March 26, 2007 10:00 AM
Subject: [Discuss-gnuradio] Sampling rate of USRP board
Hello,
I have recently purchased the USRP board and the RX daughterboard, and I
have started working on them.
One major factor that I need to change is the sampling rate frequency of
the ADCs on USRP, I know the USRP clock is at 64MSPS and I need to reduce
it to at least half of it.
My question is two fold, should I decimate the digitization, or is there
any other way of doing that? How difficult would be to change the clock?
And can someone confirm that the USRP can accept an external clock? If yes
do I need to have some hardware adjustments?
Please excuse me if I repeat an older thread, it would be nice to guide me
there. I think that it might could be a good idea to have some kind of
forum, with different parts dedicated to USRP.
Regards
Rigas Ioannides
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