[time-nuts] Why are 1PPS signals so skinny?

[Magnus Danielson]

On 05/16/2012 01:43 AM, Rick Karlquist wrote:
> SAIDJACK at aol.com wrote:
>> Yes, but the point is to not use end-termination for all the reasons
>> mentioned by others in this thread, such as massive spike in power
>> consumption
>> once per second, over-voltage spikes if the termination is faulty or
>
> FWIW, the E1938A oscillator control board had a "happy light" LED
> that flashed 1 time per second, and sure enough this corrupted the
> power supply and affected some applications.  We added a command
> to turn it off.

The TDR blinking light on Tek SD-24 caused significant delay shifts. An 
upgraded firmware removed blinking to lower jitter.

Cheers,
Magnus