Hi Dick, I've been silently enjoying all the comments that Time-Nuts Digest has had to offer for some time now, and have been too timid to respond (or simply not smart enough). I do have a solution if you do not want to make the RS232 conversion on the Z3801A. Originally I made a 422 to 232 converter using a free sample chip from Maxim. I believe it was the MAX232. It worked fine, and I still have it. I mounted all the required surface mount components "dead bug" style on a small piece of perf board and mounted that within a DB-25 back shell. The only drawback with the circuit was that I had to provide an external 5 volt supply and since I did not want to intrude into the PC, I used an external bench power supply. I eventually bit the bullet, and made the modification inside the 3801. Glad I did, it's much simpler now and unless you need the long line length that RS-422 can handle, the 232 mod is well worth it. If you want further info on the MAX232 method, I can take pictures of the one I built and dig up the schematic I used. However, it can be found on the web, I just can't locate the links right this minute.
Good luck, Charles N7SFW _______________________________________________ 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.
