[time-nuts] FE-405 DOCXO info request

Stanley Reynolds stanley_reynolds at yahoo.com
Mon Jun 28 21:25:07 UTC 2010

Thanks, looking into it now, maybe they left the door unlocked.


----- Original Message ----
From: Magnus Danielson <magnus at rubidium.dyndns.org>
To: time-nuts at febo.com
Sent: Mon, June 28, 2010 3:33:12 PM
Subject: Re: [time-nuts] FE-405 DOCXO info request

On 06/27/2010 12:31 AM, Stanley Reynolds wrote:
> I have a FEI Communications FE-405B DOCXO looking for info.
> Sales flyer and pictures of the unit here: www.n4iqt.com/fei-fe405b
> The Sales flyer listed the 405A and I have the 405B don't know the difference.
> A manual that shows the digital error correction via the i/o port would be great, even better would be info on changing the frequency of the synthesizer.

I hope you realize that J513 is the ISP connector, and if you look into 
the datasheet of the 89C52 you will realize that it has a read out 
command. You could readout the FLASH that way. The datasheet even points 
to the tool:

So, it could be a bit of wiring to pull the FLASH out.

You can dig a lot of useful info out of such an image.


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