> I have the Trimble NTPX26AB-06 and I have established that the I/O > port (25 way D connector) has the same pin-outs as the Z3801A. Can any > owners/users of these units advise me on a suitable (proved to work) > interface adaptor from the RS-422 to RS-232. The unit works fine and > is producing its 10 MHz output with very good accuracy, but I am > looking forward to "seeing it" through its interface with TBolt Mon.
The Z3801A has both RS-422 and RS-232 level conversion chips inside. What gets routed to to the connector is determined by either some jumpers on a header or some zero ohm resistors. So it's easy to modify the unit to directly speak RS-232. I don't know what's in the NTPX26AB, but looking to see if there is an RS-232 chip seems like a good excuse to open it up and look around. :) (If you haven't done it already.) If you want to build an external converter box, I have schematics I found on the web many years ago. They use LTC1318 or MAX3162. I'm sure there are many other chips, but those are probably a reasonable place to start. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
