[time-nuts] Thunderbolt test results
lists at rtty.us
Fri Jun 11 14:24:33 UTC 2010
Ok, then the TBolt is running 100 to 200 ns for a tau of 12 seconds to 280K seconds.
Without looking at the raw data it's tough to see what's going on. The numbers are 5 to 10X worse than I would have expected them to be.
One of the monitor programs (like Lady Heather) might be useful in diagnosing any issues you may have.
On Jun 11, 2010, at 9:29 AM, Peter Vince wrote:
> HI Bob,
> 10 nanoseconds at the bottom, up to 10 microseconds at the top,
> in three logarithmic sections.
> Donal: Is the time-constant at its default of 100 seconds, and was the
> above plot taken shortly after turning it on? There has been lots of
> talk on here about tweaking the performance. Increasing the
> time-constant to between 500 and 1000 seconds should help, as will
> stabilising the environmental temperature. Let it run for a few
> weeks, and the oscillator will settle down, and you should get some
> better results.
> On 11 June 2010 14:20, Bob Camp <lists at rtty.us> wrote:
>> The vertical axis on the plot is pretty tough to read. What is the scale?
>> On Jun 11, 2010, at 8:43 AM, Donal G wrote:
>>> Hi Guys,
>>> I bought a Thunderbolt device recently. I have done some
>>> 10Mhz frequency tests in comparison to a Cesium reference.
>>> Attached is MTIE plot. Have any of you done similar tests? any comment on
>>> my results?, is this normal operation when locked to the GPS? I was
>>> expecting better results that this!
>>> <TBOLT -MTIE-small.JPG>_______________________________________________
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