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Re: [Discuss-gnuradio] USRP2-FLEX2400 Transmit and Receive problems

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] USRP2-FLEX2400 Transmit and Receive problems
Date: Wed, 01 Sep 2010 15:08:53 -0400
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On 09/01/2010 12:51 PM, Jason Abele wrote:
I'll need to do some re-soldering and burn-db-eeprom with USRP1 and hopefully 
should fix the problem:
Also, since you use UHD, you can change the daughterboard ID of a
daughterboard on a USRP2 from your host PC using:


An example of changing the DBID for a DBSRX is show here:


So, Jason, is this because the older FLEX-series boards used an on-board clock that is *different* than the one supplied by the USRP2, and the driver code (either Classic or UHD) assumes a different clock rate than the one that was previously on-board, and thus
  is mis-programming the PLL?

If the two clocks are the same frequency, then I don't understand why changing from "clock supplied on-board" to "clock supplied by USRP2" would "fix" the problem.
  Inquiring minds want to know...

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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