[time-nuts] The Trimble NTPX26AB-06 / Z3801A

Björn Gabrielsson bg at lysator.liu.se
Sat Nov 22 11:54:23 UTC 2008


Hi Roy,

On Sat, 2008-11-22 at 11:29 +0000, Roy Phillips wrote:

> at the front of the unit via a connector, and there is a location on this 
> PCB for a for a 9-pin D connector!.  If this had been used it would have 
> made a serial port available at the front panel. More interesting is that 
> there are tracks feeding what would have been pins 2,3 and 5 !

> Perhaps there was an intention in the original specification to provide a 
> "service" serial port to the front of the unit - but would this have 
> provided RS-422 and not RS-232 signals ? 

RS-422 gives you, at least, RX+, RX-, TX+, TX-; your pins (2,3,5) cannot
be RS-422. I would spy voltage levels with a scope, and hope for
RS232-levels or TTL-levels.

TTL is easily shifted with a MAX232 or equiv.

> Roy

--

    Björn




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