[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Discuss-gnuradio] Re: USRP2 and external clock (from GPS receiver)

From: Changkyu Seol
Subject: [Discuss-gnuradio] Re: USRP2 and external clock (from GPS receiver)
Date: Thu, 19 Feb 2009 13:55:42 +0100

Matt Ettus wrote:
> The easiest way to check for lock is to put the following line in your
> firmware:
>   clocks_enable_test_clk(true,10);
> This will output a test clock on the middle 2 pins of the 4 pin
> connector right near the VCXO on the motherboard.  Look at one of those
> 2 pins on an oscilloscope at the same time as the 10 MHz reference.  You
> should see the two clocks don't drift relative to each other.

I tried as you suggested but it still drifts. I also added the following 
line in the firmware to make sure.


I tried on several different USRP2s and I got same results.
Any more suggestions?
Posted via http://www.ruby-forum.com/.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]