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

[Chris Stankevitz]

Heckler, Gregory W. (GSFC-596.0) wrote:
> Have you ruled out the USRP overflowing? I have had that problem bite me 
> too. It causes all of the tracking
> channels to dump in my receiver, but I could see how it could also cause 
> a jump in the frequency estimate
> (delay in time domain == shift in frequency domain) coming out of your 
> FFT acquisition.

Hi Greg,

I ruled out a USRP overflow for two reasons:

1. When I recorded the data, there was no indication of overflow

2. When I perform a "continuous acquisition", the frequency jumps, but 
the C/A offset does not.  When data is lost, the C/A offset will jump also.

However, I do have a dataset with missing data that gave no indication 
data was lost during the collect.  I'm chatting about this in another 
thread "Losing data during long collects"

CHris