Not sure why my email to this list is lost or delayed but some does get thru.
Working on a parts list and circuit diagram for the FTS 1000 which can be found here: www.n4iqt.com/fts1000b Stanley ________________________________ From: Stanley Reynolds <[email protected]> To: [email protected] Sent: Tuesday, January 20, 2009 11:20:28 AM Subject: RE: [time-nuts] Datum 1000B OXCO ----- Forwarded Message ---- From: Stanley Reynolds <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Sent: Monday, January 19, 2009 5:16:51 PM Subject: Re: [time-nuts] Datum 1000B OXCO My control voltage is adjustable from 0 to 12 positive volts maybe in this application no negative supply ? Yes it has the external pot but in this package FTS-4040 the 5030 assembly's long side is from side to side not front to back like the FTS-4060. So the external adjustment is on the left side. I have two 5030's on the way, hope they are the 5 Mhz version 1000B not the 10 Mhz OCXO. I could use a substitute 5 Mhz OCXO and the main board from my broken 1000B to get the two outputs I need but that would be a less desirable option. Started a schematic of the oven circuit see attached bit map file, easy traces done the hidden parts yet to do. Stanley ________________________________ From: Corby Dawson <[email protected]> To: [email protected] Sent: Monday, January 19, 2009 10:46:37 AM Subject: Re: [time-nuts] Datum 1000B OXCO Hi, The data sheet for the 1000B is available on the Symmetricom website. The pinout is not given. Here is the pinout. 1- Electronics return 2- Control voltage in -10 to +10 VDC 3- Coarse tune in voltage 4- +12VDC reference out, coarse tune hot 5- Oven return 6- Oven monitor 7- +24VDC oven power 8- +24VDC electronics power 9- Case ground On some units the internal coarse control is disabled and the pot is brought out to the instruments rear panel to allow adjustment without disassembling the unit! You can tell if this is the case if wires are connected to the mainframes connector on pins 1 3 and 4 and finding the pot at the other end. These 1000B have pins 3 and 4 as shown. In this case pins 1 and 4 connect across the pot and the wiper goes to pin 3. The pot on the 1000B will not have any effect. Hope this helps. Corby Dawson <snip> _______________________________________________ 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.
