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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: Re:: Timing GPS |
| From: | "jannsen" <[email protected]> |
| Date: | Wed, 18 Feb 2004 15:02:53 +0100 |
| References: | <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
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 regardsUwe/dj8wx |
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