[hpsdr] GPSDO

[MICHAEL ST ANGELO]

Does the Navman modules have a 10kHZ output? Most of the new ones I see on ebay have only a 1PPS output?

What is the model number?

Mike N2MS


> On March 8, 2017 at 6:56 PM K4KV <k4kv at k4kv.com> wrote:
> 
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hello,
> 
> I wanted to report back that those $12 Navman GPS modules off of Ebay 
> work fine.  Using
> 
> VisualGPSView, they obtained fixes after several minutes.
> 
> My board would not lock onto the signal on either of these boards, but I 
> do not believe it
> 
> has anything to do with the GPS modules.  I can see rapid changes in the 
> 10Mhz signal to the Hermes
> 
> as if the loop filter values are not correct.  I had long since taken 
> the wires off the board so that I
> 
> could monitor the loop filter with the scope.  These modules model # end 
> with 041 while my original ends with 021.
> 
> 
> I spent some time monitoring the 10Mhz accuracy on WWV using the 
> Spectrum view program.  Even though
> 
> the VisualGPSView said I had a GPS Fix, the clock was still not 
> accurate.  It took some minutes more, after the
> 
> first 'fix', then all of a sudden I saw the altitude, lat and long, move 
> a bit to a number I know is right.  Then
> 
> WWV was correct, with the tones within 1 Hz.
> 
> 73
> 
> Glen K4KV
> 
> 
> 
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