[time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z381...

Bob Camp kb8tq at n1k.org
Tue Nov 4 17:35:40 EST 2014


Hi

10 MHz phase noise vs ULN: 

Looks ugly

Bob
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> On Nov 4, 2014, at 12:18 PM, Götz Romahn <goetz at g-romahn.de> wrote:
> 
> The Alarm connector J3 is connected as follows:
> pin 1 goes to pin 6 of U208
> pin 2 goes to pin 5 of U208
> pin 3 goes to pin 6 of U207
> pin 3 goes to pin 5 of U207
> 
> U208 (and eventually U207) are labeled 207a. This leads to IL207 from Siemens which is an optocoupler. Pin6 of this is collector and pin 5 is emitter. Pins 1 and 2 are laser diodes.
> 
> All other pins of J3 look nc.
> cheers Götz
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