Look at Bob Camp's post. Yahoo mail made a hash out of my formatting. Bob
From: Bob Stewart <b...@evoria.net> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Monday, December 1, 2014 8:17 PM Subject: Re: [time-nuts] Lucent KS-24361 RS-422 interface pinout Hi Graham, There was a post, I think by Anthony, that discussed the USB adaptors. But your pinout looks different than the adapter I got. You have pin 1 listed as TX (-) whereas on mine pin 1 is TX (+). Likewise, you list pin 2 as TX(+) where mine is TX (-). In any case, here is the wiring I used on J8 4 TX (+)5 RX (+)8 TX (-)9 RX(-)7 Gnd At first, I thought the USB adapter I got was bad. The problem turned out to be that it doesn't play well with a USB extension cable. Bob From: Graham <planoph...@aei.ca> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Monday, December 1, 2014 7:59 PM Subject: [time-nuts] Lucent KS-24361 RS-422 interface pinout 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 -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.