[time-nuts] Odd Lady Heather graph
ziggy9 at pumpkinbrook.com
Sat Oct 23 21:59:46 UTC 2010
I did note that it was the temp sensor, but the behavior was clearly
different. I guess my earlier search terms weren't good enough to reveal
this info about the sensor differences in the T'bolts. I've done some
further digging and now have the scoop on these DS1620 changes, etc.
Other than pretty graphs, it looks like the difference between units
using one vs. the other is a (relatively) minor difference in pps
jitter. Also that for those interested enough, there have been plenty of
folks that have swapped the sensor. Thanks!
On 10/23/2010 3:31 PM, Bob Camp wrote:
> If you look at the fine print on the yellow graph, it's running right at the limit of the "bad" temp sensor. What you are seeing is normal stepping / averaging on the low resolution sensor.
> On Oct 23, 2010, at 3:28 PM, Magnus Danielson wrote:
>> Hi Ziggy,
>> On 10/23/2010 09:05 PM, Ziggy wrote:
>>> I don't know if embedded images will make it through to the list, but
>>> can someone explain the behavior indicated in this graph? This is from
>>> an auction and it doesn't look at all like other graphs that I've seen.
>>> It's only for a 12 min span, but others with a short span aren't similar.
>>> If the included graph doesn't make it to the list, please take a look at
>>> the auction (150508234942). I'd like to understand more of what I am am
>>> seeing there.
>> I assume you refer to the yellow curve...
>> Isn't that the average from the temp-sensor, being the modern coarse-stepped variant as things heats up it looks like the step-response of a one pole low-pass filter.
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