[time-nuts] FE-5680A pin 6?
Nick Sayer
nsayer at kfu.com
Fri Sep 11 14:06:43 UTC 2015
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 <nsayer at kfu.com> wrote:
>
> 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 <kb8tq at n1k.org> wrote:
>>
>> 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 see what they do or don’t know about it.
>>
>> Bob
>>
>>
>>> On Sep 10, 2015, at 9:06 PM, Nick Sayer via time-nuts <time-nuts at febo.com> wrote:
>>>
>>> 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?
>>>
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>
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