[time-nuts] NTP/1-PPS/RS232 question

["Björn"]

> bg at lysator.liu.se said:
>> The PTTI 1PPS is defined in
>>     http://www.navcen.uscg.gov/pdf/gps/ICD-GPS-060B.pdf
>> It is 20us long and common in some applications. However the voltage
>> levels
>> are a bit high...
>
> The section I saw said 10 V nominal, +1, -2.  That's 8-11 V.
>
> I think that would work fine with a RS-232 receiver.

Yes, but driving 10V into _50ohms_ is a lot of power for a modern receiver...

/Björn