[time-nuts] Kode 375-928 Display - Help!

[Rob Kimberley]

Hi Jason,

Going by the age of the unit - Kode bought by Odetics, and Odetics now Zyfer
etc, I'm pretty sure you are dealing with a RS-232 interface. Would be very
surprised if 422. Unfortunately Odetics/Zyfer don't support any of the old
stuff any more, but I'll make an enquiry to one of my old contacts on your
behalf to see if anyone has info.

Rob  

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Jason Rabel
Sent: 24 May 2007 01:11
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Kode 375-928 Display - Help!

Interesting you would mention that! After my first post I pulled the board
with the connector and was looking at the traces from the DB-25. One of the
chips nearby is a SN75176AP which I found a PDF saying it is a differential
bus transceiver (RS422). I have a SBC that you can set the com port to
RS232/422/485, so that's one little hurdle overcome.

There's quite a few pins wired, at first I was comparing it with the RS232
DB-25 which most pins made sense. I should probably look up the others and
see how they differ and such (I'm clueless when it comes to RS422/485, so
I'll be googlin' tonight).

Jason

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Jack Hudler
Sent: Wednesday, May 23, 2007 6:54 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Kode 375-928 Display - Help!

It might be RS-485 and so multiple displaies could have its own address on a
multidrop setup. 
About the only trick there is finding out if its 2 or 4 wire 485 (probably 2
because of the address).
Think I've seen some USB to 485 converters on the market, but you might get
away with driving it with RS-232.
Go Google RS-485


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