[time-nuts] Re: HP 115BR Clock 60 Hz output option

[ed breya]

Maybe the clock option is working just fine, but not applied properly. 
It could be that the driver output is an open-collector, meant to pull a 
stepper coil or such down to ground for each pulse. Without a load, 
you'd see just some small collector voltage due to the base current in 
the output transistor - the forward base-emitter voltage, minus the 
forward base-collector junction voltage could be in the tens of mV into 
high a impedance (like a scope) measurement.

So, try adding a pull-up resistor to draw at least a few mA, and see if 
it looks different. Good luck.

Ed