Hello Richard, if it helps? Y e s , thank you very much! I found everything as you describe. I know now what I thought already, that the supply is 24Vdc, the pins I had allocated already. What I did not know is that the task is to generate 15 MHz using a 10 MHz OCXO.
Underneath the top board I found the 15 MHz crystal filter. I will start to investigate more and perform some measurements. Perhaps there will be somebody able to add some more details. A pity that I do not see anymore the possibility to use the board with GPS. Many thanks Richard again for you detailed mail, regards, Arnold On Mon, 31 Oct 2005 12:56:09 -0900, Richard H McCorkle wrote: >The board you are describing is used in the Lucent RFG-M-XO reference >frequency generator. It takes in 10 MHz on J2 from a Rubidium oscillator and >disciplines the Efratom SC cut OCXO on the main board from the 10 MHz input. >The output from the OCXO is converted to 15 MHz and supplied as the >reference output on J4. >The RFG-M-RB and RFG-M-XO normally mount together in a chassis (which I didn >'t get) and the modules are connected to the chassis by a harness with a >DB15 on the chassis end. The pin out for the harness is as follows: >DB15M TO/Pin# Description >Pin # >1 RFG0 - P1-1 +24v 1.3A/0.6A >2 RFG0 - P1-2 Common >3 RFG1 - P1-1 +24v 0.6A/0.4A >4 RFG1 - P1-2 Common >10 RFG0 - J3-1 Alarm >11 RFG0 - J3-2 Alarm >12 RFG1 - J3-1 Alarm >13 RFG1 - J3-2 Alarm >A second interface cable ties the RB to the XO as follows: >RBJ5 XOJ5 >Pin # Pin# >1 5 >3 3 >The male DB9 is P1 and pin 1 = +24v @ 400ma, Pin 2 = Common. This will power >up the board so you can verify operation of the OCXO. Unfortunately that is >all the information I have on the unit. >Hope this helps. >----- Original Message ----- >From: "Arnold Tibus" <[EMAIL PROTECTED]> >To: "Discussion of precise time and frequency measurement" ><[email protected]> >Sent: Monday, October 31, 2005 10:02 AM >Subject: [time-nuts] Unknown Efratom 10MHz Assy, information asked >> Hello to the group, >> I have got in my hands a very nice looking board >> from EFRATOM equipped with a 10 MHz OCXO. >> The designation on the top of the board is >> 55761ASSY104920-001 >> the label underneath shows >> 55761-104919-001 >> The Ocxo P/N is 105243-001, 10,00MHz >> The board is complete with 3 x 9pin D-Type connectors >> 2x fem. 1x male, which seem to be the connector >> for the powering of the assy. >> There are 2x SMA conns. fem., J2 and J3, J1 is not >> assembled. >> >> For memory backup there is a mignon battery holder on. >> The small board monted on top of the main board >> does have a PLL system with a 74HC4046N and a lot >> of other typical chips assembled (CD4060, 74HC08, >> 54HC573F, AD75388Q and others.). >> I guess this was a part of a Rb-reference device, >> too nice to disassemble. >> >> Therefore I ask into the round table all the experts, if there >> is somebody who could help me with more details, circuit diagram >> or I/F informations etc. >> >> As I am anyway trying to set up a GPS disciplining system >> for a 10 MHz OCXO or a Rb LPRO oscillator. >> >> BTW. I am enjoying since a few weeks following all the expert >> discussions on this site and I red most of the technical issues >> a few years backwords, I learned a lot, thank you all the >> excellent discussions and informations of the experts. >> I would be happy to get informative answers and help, >> thanks in advance, >> >> excuse me my struggling english please, I am willing to learn as >> well on that point. >> >> Arnold, DK2WT >> >> >> >> >> >> >> >> >> _______________________________________________ >> 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 _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
