Hi

10 MHz phase noise vs ULN: 

Looks ugly

Bob

Attachment: 10 MHz phase noise vs ULN.pdf
Description: Adobe PDF document




> On Nov 4, 2014, at 12:18 PM, Götz Romahn <[email protected]> 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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