Hi If you dig back a month or so, there is a post with all the pinouts on all the connectors.
4 RX+ 8 RX- 5 TX+ 6 TX- 3 and 7 ground It’s serial so TX on one goes to RX on the other. + goes to + and - to -. The pins are numbered on the connector in *very* small print. Bob > On Dec 1, 2014, at 8:59 PM, Graham <[email protected]> wrote: > > I got my pair of REF-0 and REF-1 to lock, REF-1 is now in STBY and the REF-0 > is on. Thanks to Bob suggesting I wiggle and/or re seat the interface cable. > > However, I have not been able to "peek" inside using the DIAG port. Rather > than try the hack suggested by Stu I bought a USB to RS-422 interface cable, > a Startech ICUSB422. It has a DB-9P which plugs directly into the DIAG > connector BUT on comparing it's pinout to the "hack cable" suggested by Stu, > it seems that they really don't line up correctly. > > This is Stu's suggested "hack cable" from his very informative earlier post > > RFTG PC > > DE-9P DE-9S > > 7 <---GND---> 5 > 8 <--------- 3 TXD > 9 ---------> 2 RXD > > The ICUSB422 pinout is as follows (arrows point in direction of data flow) > > ICUSB J8 - Diagnostic > 1 TXD- --------> 8 (based on Stu's diagram and description) > 2 TXD+ --------> ?? > 3 RXD+ <-------- ?? > 4 RXD- <-------- 9 (based on Stu's diagram and description) > 5 GND --------- 7 (based on Stu's diagram and description) > 6 NC > 7 NC > 8 NC > 9 NC > > But what pins to TXD+ and RXD+ connect to? After much searching and looking > at a bewildering number of variations of pinouts, I am still confused on > where these two go. A Wild Ass Guess (WAG) is that 2 TXD+ --> 4 and 4 RXD- > <-- 5 but I am really uncertain and that is just based on one of the pinouts > I found in my searchs. > > I thought I would be lucky and would just be able to plug and play with the > ICUSB422 directly to the J8 Diagnostic port but it isn't so; I will need to > make up an additional adapter to get the right pins going to the right pins. > > I am hoping someone on the list knows for certain. Failing that I will have > to poke at it with a scope or DVM tomorrow and to see if I can make sense of > it. > > cheers, Graham ve3gtc > > _______________________________________________ > 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. _______________________________________________ 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.
