K0RY Notebook

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====== Project 2017a Microcontroller Nixie Clock ======
  * 10 MHz XO
  * 1x6 Multiplex Display (IN-12 Tubes)


===== Long Term Observations of Clock Phase wrt/ UTC =====


<del>HP5335A</del> HP5334A is measuring time from 'every other 1PPS' clock debug signal to XLI 1PPS out.

The unwrapped TIC data is really just a simple remapping of [0,1] to [-0.5, 0.5].

Temperature measurements from Acromag 965EN. "Clock" channel thermocouple is in the air about 2 inches from the 10 MHz crystal.  "Window" channel thermocouple is currently unavailable (was leaning against the window, about 18 inches from the clock).

==== Last 24 hours ====
{{:wiki:p2017a:unwrapped_tic_day.png|}}

{{:wiki:p2017a:freq_error_temp_day.png|}}

==== Entire Collect ====
{{:wiki:p2017a:unwrapped_tic_full.png|}}
{{:wiki:p2017a:freq_error_temp_full.png|}}

=== Raw TIC Data ===
{{:wiki:p2017a:raw_tic_full.png|}}


=== Frequency Error vs. Temperature ===
{{:wiki:p2017a:scatter_freq_error_vs_temp.png|}}

==== Freshness Label ====
<php>
include "data/media/wiki/p2017a/time_of_last_update.html";
</php>

K0RY Notebook

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