Re: [time-nuts] Anyone Have Plug/Jumper Information on the 87-601 board in a TrueTime XL-DC?
Hi Jim, Thank you so much for your kind reply! I had looked through diligently TrueTime's site prior to my original post, and just finished looking through Symmetricom's site, and found a very handy index, but I can't locate schematics or board-level pictorials of the main board. Also, Section XXXI of the manual is not on either site for download, so no help there (this section mentions 1, 5, 10 MHz outputs). The manuals are not stored in their entirety, so I have to cherry-pick sections, if you will. The unit I have has the large LCD time display, as well as the smaller control/status display. the options plugged into the back include one card with three outputs- at 1 MHz and one card with three outputs at 5 MHz. What I call the main card is the one in the right-most position (viewed from the rear of the chassis), with the designation 87-601. This card has all the jumper plugs that go to the top row of unlabeled BNC connections. The bottom row of BNCs include an input for the GPS signal, an IRIG output or two, and a DB-9 connector labeled RS-232 (I have hooked this to a Linux box and successfully gotten a tier-1 NTP server function to work on the Linux Box). My only source of consternation is knowledge on the strip of pins that allow hard- configuration of the four BNCs on the top row of this module... Perhaps someone has a manual gathering dust somewhere and could dust it off and give me a hint or two??? Thank you for your clues Jim- I was able to find the configuration list after your suggestion. If you have other thoughts, I'd appreciate hearing them. Thank you, Shane ___ 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] Anyone Have Plug/Jumper Information on the 87-601 board in a TrueTime XL-DC?
Hi All, I have an ebay special TrueTime XL-DC that seems to work fine, only thing is, I pulled the lid and found one of the BNC's was not connected on the 87-601 board, and would like to know what the jumper/ plug arrangement is. (some BNCs have a black and white wire in one two- pin push-on plug, others have a single wire (black or white) per push- on (two-pin) plug, and I am at a loss to understand why one might use one in one place, and the others in another). I am seeking a 10 MHz output specifically, but would like to know more about what each pin is, and if there are pins with voltage-bias, etc, in the unused pins. If someone has either a pin-out list to share, or a pictorial of the pin arrays with descriptive nomenclature, that would be most appreciated. Otherwise, I'll poke around in there with an oscilloscope to ferret-out the details. Thank you, in advance, for any assistance you can offer!!! I hope this isn't too OT here. 73, Shane KE7TR ___ 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.
