[time-nuts] FE-5680A

WB6BNQ wb6bnq at cox.net
Thu Nov 10 22:31:46 UTC 2011


Peter,

Is the 10 MHz output a clean sinewave or does it look kind of trashy ?

thanks,

Bill....WB6BNQ


Peter Bell wrote:

> 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,  <EWKehren at aol.com> 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
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