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From: | Matt Ettus |
Subject: | Re: [Discuss-gnuradio] DBSRX used for GPS: cycle slip |
Date: | Thu, 29 May 2008 15:39:53 -0700 |
User-agent: | Thunderbird 2.0.0.14 (X11/20080501) |
Chris Stankevitz wrote:
Chris Stankevitz wrote:I am seeing sudden freq shifts at the local oscillator on the order of ~500Hz which make it impossible to track GPS.It appears that this problem happens on only one of my two DBSRX boards.
What are your PLL settings? If you minimize the R divide ratio, you can eliminate this. The larger R divide will put you further from right on frequency, but the DDC will put you right back in the right place.
Matt
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