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 ----- Original Message ----- From: "Bruce Griffiths" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Tuesday, February 12, 2008 8:39 PM Subject: Re: [time-nuts] Trimble Thunderbolt Rs-232 Levels > Darrell Robinson wrote: > > I've just purchased a Trimble Thunderbolt from e-Bay, and from the various > > documentation that I've found online I'm still not 100% sure if I can use > > the RS-232 interface directly with my computer. I'm concerned that I might > > cook the Trimble interface with the ±12 volts from the computer RS-232. I'm > > wondering if the Trimble is TTL level only and therefore needs a MAX232 or > > similar, or does it use the older standard ±12 volt levels? > > > > The box I have does not have the power supply board enclosed. It's the > > timing board only with 2 BNC, an 'F' connector and a 6-pin power plug. Does > > the power supply board that comes with the more complete version have a > > level converter built in? > > > > Darrell > > > Darrell > > Does the board also have a DE9 connector? > If so its likely to be RS232 compatible as stated on the datasheet. > Does the board look like that in the attached image? > > 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. >
<<thunderbolt2.jpg>>
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