[GPS_Standard] Re: GPS_Standard Digest, Vol 24, Issue 3

[AL1]

Hy,
i'm going to try it.
I have an Efratom RO model FRS-A.
I'll work on that trick in the days are coming.
want to know more details?
Alain
 REF 55987


" La Lune est le rêve du soleil "  (Paul Klee)


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De : <gps_standard-request at mailman.qth.net>
À : <gps_standard at mailman.qth.net>
Envoyé : vendredi 21 novembre 2008 10:00
Objet : GPS_Standard Digest, Vol 24, Issue 3


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| Today's Topics:
|
|   1. Using a Datum Rubidium Oscillator with GPS Frequency Standard
|      (Richard Gill)
|   2. Re: Using a Datum Rubidium Oscillator with GPS Frequency
|      Standard (Zack Widup)
|
|
| ----------------------------------------------------------------------
|
| Message: 1
| Date: Thu, 20 Nov 2008 07:36:30 -0800
| From: "Richard Gill" <kq6ef at pacbell.net>
| Subject: [GPS_Standard] Using a Datum Rubidium Oscillator with GPS
| Frequency Standard
| To: <gps_standard at mailman.qth.net>
| Message-ID: <26CDC13A7CD240D18435DDE31F2F6871 at richard71hdvxk>
| Content-Type: text/plain; charset="iso-8859-1"
|
| With the current availbility of the Datum LPRO Rubidium Oscillator that are 
coming on the surplus market.
|
| Has anyone tried to interface one of these units with the GPS-Derived 
Frequency Standard?
|
| These Datum units have an external frequency adjustment input. 0Vdc to 5 Vdc 
on pin J1-7 and rtn on pin J1-2.
|
| Info on the Datum units is at:
|
| http://www.ham-radio.com/sbms/LPRO-101.pdf
|
| Any thoughts or ideas on this?
|
| I have not yet built my GPS Standard yet. So maybe this is the way to go.
|
| Thanks
|
| Rich  KQ6EF
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| ------------------------------
|
| Message: 2
| Date: Thu, 20 Nov 2008 10:08:20 -0600 (CST)
| From: Zack Widup <w9sz at prairienet.org>
| Subject: Re: [GPS_Standard] Using a Datum Rubidium Oscillator with GPS
| Frequency Standard
| To: gps_standard at mailman.qth.net
| Message-ID: <Pine.LNX.4.64.0811201003390.7286 at bluestem.prairienet.org>
| Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
|
|
| I'm just wondering about the tolerance of accuracy of the rubidium units
| vs. deriving the accuracy from a GPS. I thought the idea of the rubidium
| standard was that it was accurate and stable enough to not need that.
|
| I haven't really looked into it yet; I do know that the stability and
| accuracy of my stand-alone OCXO's out in the field is adequate for use as
| a reference up through 10 GHz as long as I calibrate it against something
| more accurate every once in a while. The last time I checked it didn't
| even need tweaking.
|
| I may need something more accurate for the LO when I get my 47 and 78 GHz
| transverters done, hopefully over the winter.
|
| 73, Zack W9SZ
|
| On Thu, 20 Nov 2008, Richard Gill wrote:
|
| > With the current availbility of the Datum LPRO Rubidium Oscillator that are 
coming on the surplus market.
| >
| > Has anyone tried to interface one of these units with the GPS-Derived 
Frequency Standard?
| >
| > These Datum units have an external frequency adjustment input. 0Vdc to 5 Vdc 
on pin J1-7 and rtn on pin J1-2.
| >
| > Info on the Datum units is at:
| >
| > http://www.ham-radio.com/sbms/LPRO-101.pdf
| >
| > Any thoughts or ideas on this?
| >
| > I have not yet built my GPS Standard yet. So maybe this is the way to go.
| >
| > Thanks
| >
| > Rich  KQ6EF
|
|
| ------------------------------
|
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| End of GPS_Standard Digest, Vol 24, Issue 3
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