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[Discuss-gnuradio] DBSRX used for GPS: cycle slip

From: Chris Stankevitz
Subject: [Discuss-gnuradio] DBSRX used for GPS: cycle slip
Date: Thu, 29 May 2008 14:44:01 -0700
User-agent: Thunderbird (X11/20080502)


I am seeing sudden freq shifts at the local oscillator on the order of ~500Hz which make it impossible to track GPS.

We suspect under certain conditions there are cycle slips in the DBSRX PLL.


1. Can someone provide a schematic of the DBSRX in pdf or tell me how to read the one at http://www.gnuradio.org/trac/browser/usrp-hw/trunk/dbsrx

2. What are the R and C values of the analog PLL filter on the DBSRX?

Thank you,


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