|
From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] USRP2 and external clock (from GPS receiver) |
Date: | Thu, 19 Feb 2009 10:27:48 -0800 |
User-agent: | Thunderbird 2.0.0.19 (X11/20090105) |
Douglas Geiger wrote:
Is the test clock supposed to be running at 5kHz? I've just tested this on one of my USRP2 - it does appear to be locked with my external clock - - i.e. the 5kHz signal on the pin doesn't drift w.r.t my 10Mhz external
No, the test clock runs as 100MHz/div where div is the 2nd argument to the function. The maximum value of div is 32.
I think you are using a digital oscilloscope to view this, and you are seeing it alias because you turned the time per division up way too high. Change it to 100ns per division.
Matt
[Prev in Thread] | Current Thread | [Next in Thread] |