[time-nuts] Trimble Thunderbolt Start Up RS-232 Communications Glitch

Artek Manuals Manuals at ArtekManuals.com
Tue Sep 4 16:26:58 EDT 2018

You using a mother board serial port or a USB adapter? Not all USB/RS232 
adapters are created equal. Drivers for brand "X" vs brand "Y"  can make 
a difference,. I would go down in the lab to see what I have that is 
currently working but it is at least 5 years old and you wouldn't likely 
find it anyway. How your operating system handles the drivers and the 
polling process will also make a difference. They are not generally 
expensive so you may have to play mix and match till you get a combo 
that is stable.

Tell us what operating system and how the COM port is derived for starters

manuals at artekmanuals.com

On 9/4/2018 3:54 PM, skipp via time-nuts wrote:
> Re: Trimble Thunderbolt Start Up RS-232 Communications Glitch
> Hello to the Group,
> Would anyone be able to help provide a bit of insight
> or experience in dealing with what I call the an initial
> Trimble Thunderbolt GPSDO RS-232 communications glitch
> (during initial power on/up).
> I've noticed some of the programs (Lady Heather) and
> external status monitor devices (my own), sometimes
> seem to initially stutter, freeze or even lock up if
> the RS-232 cable connection is made (as one would expect
> to be normal).
> Establishing a working initial power on/up, serial
> port monitor function can require a physical disconnect
> from the GPSDO. Once everything is on, the physical RS-232
> connection can be made and monitor functions operate
> well going forward.
> Would there be a hardware or software "serial comm
> preamble" or power-on sequence, best order of
> operation?  The physical disconnect RS-232 comm
> reset is more than casually inconvenient.
> Thank you in advance for your replies
> Cheers,
> Skipp
> skipp025 at jah who dot calm.
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