[time-nuts] FE-5680A pinout
jgray at zianet.com
Wed Apr 20 21:51:07 UTC 2011
I know that several list members have bought FE-5680A rubidiums. Of
all the various ebay sellers that you have bought this model from, who
would you recommend? If I wanted a straight 10MHz unit vs a frequency
agile unit, would you recommend a different seller?
On Wed, Apr 20, 2011 at 1:02 PM, Murray Greenman
<Murray.Greenman at rakon.com> wrote:
> The confusion is understandable. There are so many different variants of
> the FE-5680A, and they are not easy to identify.
> Some of the information you see out there is from folk who measure the
> voltage on the pins with a meter, not understanding what they are
> looking at. When I've investigated such devices (I have several FEI
> units) I start by tracing my way back from the power supply regulators
> to determine where the power goes in, and what it should be, to avoid
> mistakes. It's also been a useful technique with things like GPSDOs
> where nothing is known about the pinouts (Trimble NTGS-50AA for
> Sure is frustrating when you have one that isn't frequency agile! One of
> my FEI units is an FE-5680B with only 1pps output. The Chinese supplier
> thought it was faulty, but the 1pps pulse is only 5us wide, and isn't
> present until the unit has locked. I found a very useful 60MHz reference
> inside the unit as well.
> Murray ZL1BPU
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