Envelope-to: dave@picks.force9.co.uk
Delivery-date: Mon, 12 Sep 2005 12:43:08 +0100
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From: Jean-Louis.RAULT@fr.thalesgroup.com
To: rsgb_lf_group@blacksheep.org
Date: Mon, 12 Sep 2005 13:40:13 +0200
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Subject: LF: TR: AR5000A
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Many thanks to all who responded to my query about the AR5000A 10 MHz ref input.
Please find below the answer I just got from AOR UK (thank you Tracey!)

73 de JL F6AGR


> -----Message d'origine-----
> De : AOR UK LTD [mailto:info@aoruk.com]
> Envoyé : lundi 12 septembre 2005 10:53
> À : Jean-Louis.RAULT@fr.thalesgroup.com
> Objet : Re: AR5000A


<snip>

> The AR5000 series of receivers have been designed & 
> manufactured by our 
> associate company in Japan who are responsible for international 
> distribution, the appointment of national distributors and support:
> 
>     AOR Ltd, 2-6-4 Misuji, Taito-Ku, Tokyo 111-0055, Japan
>     Tel: +81 3 3865 1695
>     Fax: +81 3 3865 1697
>     e-mail: post@aorja.com
>     WEB  http://www.aorja.com
> 
> I wonder what specific query you have regarding the 10MHz external 
> reference, here are a few comments...
> 
> 1) Selection of the external 10MHz / internal 12.8MHz 
> reference is via a 
> menu.
> 
> 2) From our experiments, the minimum drive level is about 0dBm, about 
> 10dB above this level (+10dBm) appears necessary to ensure 
> PLL LOCK on 
> all bands.  We have driven the AR5000 successfully from our workshop 
> reference of 5V.
> 
> 3) Only the master oscillator is controlled by this 
> reference, the radio 
> uses three oscillators in its superheterodyne circuit, so use 
> of a 10MHz 
> reference does not make the radio fully frequency / phase 
> coherent. AOR 
> used to make a custom version for coherence called the AR5000C, it is 
> no-longer available.
> 
> 4) Typical drift using the internal 12.8MHz reference can be 
> viewed on 
> the following link:  http://www.aoruk.com/5000bull.htm#frequency
> 
> I hope my comments will be of assistance.
> 
> Regards, Richard Hillier - AOR UK
> 
> b.c.c. Frederic Collin, AOR Japan
> > 
> > 
> >-----Message d'origine-----
> >De : owner-rsgb_lf_group@blacksheep.org
> >[mailto:owner-rsgb_lf_group@blacksheep.org]De la part de 
> Tracey Gardner
> >Envoyé : lundi 12 septembre 2005 10:23
> >À : rsgb_lf_group@blacksheep.org
> >Objet : LF: Re: AR5000A
> >
> >Hello Jean-Louis
> > 
> >Just contact Richard Hillier at AOR UK. info@aoruk.com
> >He will be able to answer your question straight away.
> >I've always found AOR UK to be extremely helpful.
> >I've no connection with them, other than being a satisfied customer.
> > 
> >73s Tracey
> > 
> >  ----- Original Message -----
> >  From: Jean-Louis.RAULT@fr.thalesgroup.com
> >  To: rsgb_lf_group@blacksheep.org
> >  Sent: Monday, September 12, 2005 8:07 AM
> >  Subject: LF: AR5000A
> >
> >  Hi all
> >   
> >  The AOR AR5000A receiver is fitted with a 10 MHz ref. 
> input allowing to
> >  lock the VFOs on an external high stability frequency source. The
> >  user's manual doesn't give any details on the shape 
> (square ? sine ?)
> >  and the amplitude of the 10MHz ref. signal to be used.
> >  Anyone there having any details ?
> >   
> >  Thanks
> >   
> >  73 de Jean-Louis F6AGR
> 
> -- 
> AOR UK LTD, Unit 9, Dimple Road Business Centre, Matlock, 
> Derbys DE4 3JX,
> England
> Tel: 01629 581222  International +44 1629 581222
> Fax: 01629 580070  International +44 1629 580070
> info@aoruk.com  http://www.aoruk.com
>