On Tue, 2008-02-12 at 21:48 -0800, Darrell Robinson wrote:
> Thanks for the quick reply. It does have the 9 pin connector (DB-9?).
>
> The main source of my uncertainty comes from the "ThunderBolt GPS Disciplined
> Clock Manual ver. 3.0" on page 3-18. In table 3-3 where it shows the
> pinouts, the protocol mentions TTL.
>
> Here is what my module looks like -
>
>
>
> I think I will apply power to the module and measure the levels from the
> port. If it is TTL out, I will need to do a level shift anyway to give the
> computer proper voltages to run it's serial port.
>
> Darrell
>
Level converter arrangements are good to have handy! Note, however that
many PC serial ports will accept a "raw" TTL PPS signal, even though the
ca 0V low level formally violates the RS232 spec. Also, if you are using
a laptop, do measure the output levels from its serial port - its not
unheard of - that they have almost TTL- levels.
--
Björn
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
