On the Z3801a, if you want to use the 1-PPS or 10MHz signals that are on the
DB-25 you will need
to convert the PECL outputs. I build a little converter based on the on-semi
MC100ELT23 dual PECL
to TTL translator. I also built a simple RS422 to RS232 converter using a
DS275 and 75179
All of these were done on 16SOIC surfboards that fit inside a DB25-DB25 shell.
I wanted to keep my z3801a boxes completely unmodified.
Scott
Roy Phillips wrote:
> Dear Members
>
> 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.
> Thanks
>
> Roy Phillips
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