[time-nuts] Trimble Thunderbolt Rs-232 Levels

[John Miles]

That's an OEM unit.  Plenty of people have been using those with legacy
12-volt RS-232 ports, so I wouldn't worry about it.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of Darrell Robinson
> Sent: Tuesday, February 12, 2008 9:49 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Trimble Thunderbolt Rs-232 Levels
>
>
> 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
>
> >