[time-nuts] FE-5680A Loop Lock Indicator

[Bob Camp]

Hi

As far as I know the lock output is a CMOS output that will drive a couple of ma. There are so many variations that yours may indeed be an open collector and good to +15 volts.

Bob

On Sep 21, 2013, at 10:55 AM, Bob Stewart <bob at evoria.net> wrote:

> The instructions I got with this Rb said that you could hook an LED through a 5-10K resistor to the +15 supply and get a lock indication.  I'm using a 10K resistor and the LED lights as soon as it's powered up from cold.  Is the loop lock indicator circuit broken or is it just another strange option for these things?  I saw on one site that if you do it this way it prevents lock, but mine seems to lock OK with or without the voltage.
> 
> 
> Bob - AE6RV
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