Bill's connection info for Lucent FRS module, forwarded as agreed. Nigel GM8PZR In a message dated 02/06/2009 02:11:10 GMT Daylight Time, [email protected] writes:
Much to my amazement, I did find some notes on the DB-25 15Mhz board pinout: 1 +24V 2 +24V 3 Gnd 4 Gnd 5 6 Freq Adj (this goes directly to the FRS, the board does nothing with it) 7 Gnd 8 -Enable + 9 10 Enable - (notes are unclear on 8, 10, 11, 12. See note below) 11 To 11 on other unit 12 to Fault+ on other unit 13 External 1 (this goes to whatever the dual-osc unit plugs into, function unknown) 14 15 External 2 16 Fault + 17 Fault - 18 Ready + 19 Ready - 20 Gnd 21 Standby + 22 Standby - 23 24 25 Pins with no assignment are not used. Note - as mentioned in the previous post, two units cross-monitor each other. One is selected as primary by a manual switch. The notes I found didn't cover the details, but if I remember correctly, +/- enable selects the primary (one unit is enabled, one disabled). Then, a fault assertion by the primary will cause the secondary to become primary. The secondary's 15Mhz output is disabled; only the primary provides an output. The control lines are all TTL compatible, and are always provided in complimentary pairs. Finally, these pinouts came from tracing a live unit and observing behavior. They might not be completely accurate, but they're close. Bill Ezell ---------- They said 'Windows or better' so I used Linux. [email protected] wrote: > > In a message dated 01/06/2009 02:23:46 GMT Daylight Time, [email protected] > writes: > > I did at one time have the connector pinout info, but since the board is > fairly useless, I'm not sure I kept it. It does have some nice TNC > connectors and a nice crystal filter, if you happen to need a 15Mhz > filter. > > > > ----------- > Hi Bill > > I did realise, after my posted request, that what was described in the > auction as a 15MHz oscillator was actually a 15MHz filter with 36KHz bandwidth. > Not sure that I need one either:-), but if you do still have the connector > pinout I'd be grateful for a copy. > > regards > > Nigel > GM8PZR > > _______________________________________________ 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.
