[time-nuts] Thunderbolt not seeing satellites
lists at rtty.us
Thu Jun 10 21:19:02 UTC 2010
I would certainly check the solder connections to the RF and power connectors on the PC board. Some of them apparently didn't get a real good solder job when they were new.
On Jun 10, 2010, at 3:09 PM, Steve wrote:
> Hi all,
> I have used a Trimble Thunderbolt for several years as a source for accurate 10MHz signals for counters and signal generators. I have occasionally looked at the Thunderbolt with a laptop and Lady Heather, but have largely treated the Thunderbolt as a plug-and-play-and-forget-about-it device.
> Several weeks ago I acquired one of the fluke.l monitors and attached it to the Thunderbolt, placing the fluke.l in a location such that I see it every time I walk into my shop. To my dismay, after watching the fluke.l for a while, I discovered that my Thunderbolt rarely sees satellites. I then began more intense monitoring with Lady Heather, finding that the Thunderbolt will on rare occasions show one satellite as usable, most of the time none.
> Another Thunderbolt, purchased in May, 2008, when they were sold on this list, routinely see 4-8 satellites when connected to the same antenna.
> Input voltage to the poor performing unit is about 28VDC. I did the tboltmon.exe Factory Reset with no discernible difference in performance. It is the Thunderbolt model in the aluminum housing with the red and black Trimble Thunderbolt label on top.
> Any thoughts as to what's wrong with it?
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