[time-nuts] Thunderbolt Serial Port Shutdown

Mike Naruta AA8K aa8k at comcast.net
Sun Mar 20 14:58:38 EDT 2016


I have seen something similar with one of my Trimble 
Thunderbolts that I got through this group.  After weeks of 
operation, the serial port stops responding and a power-cycle 
has it communicating again.

Firmware A002206.G1  Rev E

Running on OpenHPSDR LPU analog power supply that gets 13.6 
volts from a pair of 6 volt golf cart batteries in series that 
are charged from AC mains.

Serial port is normally disconnected; attached to MS Windows PC 
with Lady Heather when I am interested in data.

I bought a third Thunderbolt on eBay and it does not fail.  The 
second of the two Thunderbolts I got through this group in 2008 
does not fail either (same firmware).


On 03/20/2016 02:10 AM, Dave Brown wrote:
> 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 discovered 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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