Re: LF: Re:: Timing GPS

["jannsen" <0482183881-0001@t-online.de>]

Alberto di Bene schrieb:
> Hello group,
>
>    Andy G4JNT has written some notes about his GPSDO (GPS DIsciplined 
> Oscillator) project.
> I have been quite happy to host them on my Web site. You can find them 
> here :
> http://gpsdo.i2phd.com
>
> 73  Alberto  I2PHD
Hi Alberto, hi Andy,
tks for the effort.

Andy writes in the PDF:
"........
Initially I was sceptical thinking it probably only consisted of 10000 pulses 
per second - which could have been no better than the 1 PPS signal itself in the 
short term.
......."

some astronomical observatories use the GPS rcvr GSU-25. It´s 10kHz output 
is obviously pulsed according to the following specification:

Reception: 12channel parallel 
Reception Frequency: 1575.42MHz ± 1MHz (C/A code) 
Measurement accuracy: 1Sec ± 300nS (typ) 
Supply power Voltage: +5V ± 5%, ripples under 50mV 
Current consumption: Under 200mA 
Operation Temperature range: -300C~+700C 
In/Output Communication mode: Serial transfer with start/stop 
Time Mark Pulse output: 1PPS/10KHz 

regards
Uwe/dj8wx