Ah, well. I have also received two Lucent KS-24019 L106B, aka RFTG-m-XO boxes. The serial numbers indicate 95 and 96 construction. The assembly numbers, 55761ASSY103902-001 (55761 is the CAGE number for Efratom) have Rev E, S/N 522 and Rev H, S/N 2385.
The Efratom crystal(?) oscillators are 023005-001, dated 95 and 96. Google has no hits for that part number. The GPS receiver has part number 2643686MAB. This gets a few hits from vendors that will issue a quote for anything, but will not describe the part or its manufacturer. I made a power cable after tracing the male DB-9. Both drew 600 MA from a 12.5 volt battery, started out with No GPS and Fault lights, then the No GPS light started blinking. There was no GPS antenna on the TNC connector, so I didn't leave them on. The antenna jack supplies +5 volts. No signal appeared at the 15 MHz SMA connector, so I hope it is disabled until the oscillator is locked. Both of their 10 MHz IN SMA connectors still had plastic caps. I bought these units, and two of their RB cousins, hoping to get rid of the HP Z3801 units and the CS standard. They add $30 monthly to the electric bill. Now it seems that I was seriously misled, but that's the way it goes on the net. I may yet figure out how to discipline the RB from the XO. Anybody know how to divide by 2/3rds without a microprocessor? :-) Happy New Year (no qualifications) Bill Hawkins -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David I. Emery Sent: Saturday, December 30, 2006 11:10 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New pics of RFTG-m-Rb, and some comparison details On Sat, Dec 30, 2006 at 02:24:32PM -0500, John Ackermann N8UR wrote: > My RFTG-m-Rb arrived yesterday, so of course it's in pieces on the > bench today. Photos (along with those of the -XO) are at > http://www.febo.com/time-freq/hardware/Lucent_GPSDO/ My RFTG-m-XO arrived. Seems like they use a version of the UT+ timing receiver R5122U1155, which is an 8 channel version of the Motorola Oncore design optimized for timing. This 2002 or so version seems to have been retrofitted to a 1996/97 base design. Apparently have an external antenna power supply on the mezzanine board - presumably to allow the 80C188 to read antenna current (or maybe it supplies 12 volts instead of 5). -- Dave Emery N1PRE, [EMAIL PROTECTED] DIE Consulting, Weston, Mass 02493 "An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either." _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
