Assuming it's the same as the units I have (two labels, with "FEI P/N 217400-30352-1" on the upper label and two barcodes on the lower label) then the +5V supply runs all the logic in the unit. There are no special power sequencing requirements, but you need both supplies for the unit to operate. The current drain on the 5V line is fairly low - about 90mA - the 15V will pull about 2A when the unit is cold and then drops to 500-600mA once everything is warmed up. Pin 3 is the lock indicator - driven low when locked. The output (10MHz sine) is present on pin 6, and appears immediately after power up - although the frequency is not accurate until the lock pin is asserted.
The 4 digit prefix on the lower barcode is a date code - so "S/N 0416-77234" would indicate a unit made in week 16 of 2004. Regards, Pete Bell On Fri, Nov 11, 2011 at 12:30 AM, <[email protected]> wrote: > I did purchase one of the "New" FE-5680A Rb's. Looking at packaging and > the housing it does look new. I have not powered it up because of +5 Volt on > pin 4. Does any one know its purpose and is there a power up sequence. Any > help will be appreciated. > Bert Kehren Miami > _______________________________________________ > 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. > _______________________________________________ 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.
