Nixie Tube Clock ‘Dink’
Issue 9 (10 November 2017)
www.pvelectronics.co.uk
- 23 -
21
Crystal calibration
polarity
0 - Make clock run slower
7
1 - Make clock run faster
22
Slots Mode
8
0 – Slots disabled
1 – Slots every minute
2 - Slots every 10 minutes (default)
3 - Slots every hour
4 – Slots at midnight
23
RFT Sync Mode
9
0 – DCF / MSF Sync once per day only as
per parameter(24)
1 – DCF / MSF Sync every hour (default)
24
RFT Daily Sync Hour
0 – 23 (default 2)
25
RFT Seek Blanking
0 – Keep tubes lit for DCF / MSF seek
(default)
1 – Blank tubes for DCF / MSF seek
26
Reserved – leave as 0
0
27
Reserved – leave as 0
0
28
Restore default settings 0 – Keep user settings
1 – Restore original default settings
10
Notes:
1. Press ‘SET’ briefly during blanking to show time for prescribed period.
2. Night time neons mode is active when night mode is set to dim. During night time
blanking the tubes AND neons are disabled.
3. Clock is fully functional without DCF / MSF / GPS synchronisation. Set time manually.
4. Enter your time zone offset from the synchronisation source. Note that WWVB
transmits UTC.
5. In GPS Sync mode, this parameter is used to set DST. Set to ‘1’ during DST.
6. Date will be displayed each minute between 50 and 55 seconds past the minute.
7. Use parameters 26 and 27 to tune the crystal timebase. Each increment of
parameter 26 makes an adjustment of approx 0.2 sec per day.
Set the clock against a known time standard. Note the time drift after 5 full days (120
hours). This is the value to program into parameter 20. Program parameter 21 with 0
or 1 to make the clock slower or faster.
8. Visual effect / cathode poisoning prevention – all digits on all tubes are cycled for 10
seconds. This setting overrides night blanking or dimming for the duration of the effect
(10 seconds).
9. DCF /MSF synchronisation takes place on the hour. If no valid frame is received in 6
minutes, the clock reverts to normal operation.
10. Set this parameter to ‘1’ to restore original default settings. Internal operations will
then load the original factory settings and restore the value to ‘0’
