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LF: TR: AR5000A

To: [email protected]
Subject: LF: TR: AR5000A
From: [email protected]
Date: Mon, 12 Sep 2005 13:40:13 +0200
Delivery-date: Mon, 12 Sep 2005 12:43:08 +0100
Envelope-to: [email protected]
Reply-to: [email protected]
Sender: [email protected]
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:[email protected]]
Envoyé : lundi 12 septembre 2005 10:53
À : [email protected]
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: [email protected]
    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 : [email protected]
>[mailto:[email protected]]De la part de Tracey Gardner
>Envoyé : lundi 12 septembre 2005 10:23
>À : [email protected]
>Objet : LF: Re: AR5000A
>
>Hello Jean-Louis
> 
>Just contact Richard Hillier at AOR UK. [email protected]
>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: [email protected]
>  To: [email protected]
>  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
[email protected]  http://www.aoruk.com



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