[time-nuts] FE-5680A pin 6?

[Nick Sayer]

I’ve acquired an eBay 5680. I’ve hooked it up to +15 and +5 and am getting 10 MHz out and the test pin is low. The unit is warm and within any reasonable expectations, it appears to be working properly.

What I wonder about is pin 6 on the connector. Google results seem to indicate that that’s supposed to be a PPS output, but what I get on it is a fixed -5v or so. Anybody know what this signal is supposed to be?