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

There are many options. Describe the connector(s). Some have more than one connector. What have you applied to each pin? Do not say you applied +15v AND +5V, etc. without saying which pins. John WA4WDL Bob Camp wrote: > Hi > > There are far more unique pinouts for the

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

On Thu, 10 Sep 2015 18:06:23 -0700, Nick Sayer via time-nuts wrote: > 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? AFAIK

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

That makes sense. Thanks! That’ll help when it comes time to attempt to calibrate it. In this case, I doubt the seller speaks enough English to ask. But I can look at all of the pinout variations to find one with a TX pin on that wire. > On Sep 11, 2015, at 3:59 AM, Bob Camp

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

Hi There are far more unique pinouts for the 5680 than anybody can keep track of. Three also is very little that ties the markings on the unit to a specific pinout. If you are getting -5V, my guess is that you have an RS-232 output on that pin. Normal drill is to go back to the seller and

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

I figured it out. I was counting the bottom row from the wrong end. To actually find the PPS signal I had to set my scope to one-shot triggering at a very fast timebase setting (I used 500 ns/div). It’s only 1 µs wide, but it was there. > On Sep 11, 2015, at 6:07 AM, Nick Sayer

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

Hi Nick, FE-5680A is a whole family of Rb oscillators that have in common the case and name but the functionality, connectors and inner stuff varies a lot. Some are programmable on a wide frequency margin, others has a fixed frequency output, mostly 10 MHz. The connector arrangement also

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

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