[time-nuts] Thunderbolt Serial Port Shutdown

Tom Van Baak tvb at LeapSecond.com
Sun Mar 20 16:01:39 EDT 2016


Dave,

Make sure your -12 volt supply is valid. It's used by the UART. Anything from -7 to -12 should be ok.

Here's the wiring diagram:

http://www.leapsecond.com/pages/tbolt/power.htm

/tvb

----- Original Message ----- 
From: "Dave Brown" <tractorb at ihug.co.nz>
To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
Sent: Saturday, March 19, 2016 11:10 PM
Subject: [time-nuts] Thunderbolt Serial Port Shutdown


> Are there any circumstances when the Thunderbolt serial port is disabled by 
> firmware?  My TB runs 24/7 but stopped the night before last for no apparent 
> reason.   I only discoverd this when I checked Lady Heather early 
> yesterday.(19 March) LH had stopped with a 'no data' warning late on the 
> 18th Feb. I initially restarted LH but to no avail, then powered off the 
> Thunderbolt briefly-again to no avail. I then left it powered off for over 
> 24 hrs and restarted it around mid-afternoon today (20 March) and now, after 
> about four hours running normally, it seems like all is back to normal. Just 
> running Tboltmon at present but will go back to LH later tonight.
> DaveB, NZ
> 
> 
> 
> 
> 
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