[time-nuts] Trimble Acutime Gold PPS

Miguel Barbosa Gonçalves m at mbg.pt
Sun May 19 17:54:39 EDT 2013

No dia 19/05/2013, às 22:44, Mike S <mikes at flatsurface.com> escreveu:

> On 5/19/2013 5:03 PM, Miguel Barbosa Gonçalves wrote:
>> - Port A (T+) to R+ on the converter
>> - Port A (T-) to R- on the converter
>> - PPS+ to T+ on the converter
>> - PPS- to T- on the converter
>> On the RS232 part of the converter
>> - TXD (pin 3) to computer pin 1 (DCD)
>> - RXD (pin 2)to computer pin 2 (RXD)
>> - GND (pin 5)to computer pin 5 (GND)
>> I can see the serial time code on the computer yet the PPS (a long 400 ms
>> one) doesn't seem to reach the computer.
> You're trying to have two different signals sourced on the 422 side converted to 232 outputs. That converter is bidirectional, it converts one signal from 422 to 232, and another from 232 to 422. Your PPS signal is going into an output on the converter.


I suspected that this could be the case.

I think I'll build the converter whose schematic I posted previously.

I will be entertained for a few days for sure.

Thanks for your help!


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