Darrell Robinson wrote: > ( Let's try this again. My reply to this message came out as an attachment. ) > > 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 > > Darrell
That version has RS232 levels, easily checked my checking the unloaded output levels on the DE9 (D denotes connector type, E denotes shell size, 9 is the number of pins/sockets, DB9 as commonly used is strictly incorrect) connector. You will likely find a TTL/CMOS - RS232 transceiver chip very near the DE9 connector on the circuit board. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
