Hi time-nuts, It's an amazing list you have here! I had no idea! A new world to me. I am new here and this is my first posting.
I recently got one of the Ebay FE-5680A units, originating from a Motorola telecom board, without a coax out. I do not even have the Motorola board so there is little to start with. I fund some postings on the FE unit, most from 2005, here on in the time-nuts list. Did any of you make any progress with this unit and the pinout and communicating with it? I'd prefer not to fry the thing right from the start..... I have opened the lid and found that my unit has a RS232 chip, Sipex SP233ACT. There is also a small internal 5 pin connector on the PCB, connected to the RS323 chip Rx/Tx and +5V. I can trace the front panel 9-pin connector pin 1 / power in to the onboard VR and pin 2 is ground. The unit has and a AD9830A DDS for frequency synthesis. In the product sheet for the FE-5680A it's mentioned that the unit can be factory programmed to wanted frequency. A good guess is that it's via this PCB port as RS232 is not available on the front panel connector as far as I can find. There are also two pushbuttons on one PCB. I have seen mentioned in the datasheet that it's for trimming the frequency. Well, any input would be highly appreciated. I have searched the net for all docs I could find but nothing very useful so far. I will be happy to share my findings if someone is interested. Neo-Timer Jan _______________________________________________ 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.
