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Nixie Tube Clock ‘Spectrum 18’
Issue 2 (15 February 2015)
www.pvelectronics.co.uk
- 33 -
7.3 Setting Up for First Reception.
1. Ensure the correct setting has been applied to Config 12:
1 = DCF
3 = MSF
2. For the first tests, ensure Config 25 is set to value 1, to make
the HV converter switch off for synchronisation. This stops any
noise created by the HV converter.
3. Set Config 14 - 17 for your location's time zone offset from the
transmitter.
4. Connect the receiver, and place horizontally by a window,
broadside on to the transmitter as far as is possible.
5. Wait until after dark, and preferable the early hours.
6. Command a manual seek, by pressing the middle 'Adj' button.
The tubes should switch off. The LED on the receiver module will
now not be affected by the HV converter, and after 15-30 seconds
start to flash regularly, showing the one pulse per second data
from the transmitter.
If your Module's red LED does not start to flash regularly, go back
and check 1-6. of this section. If the red LED does not flash
regularly, you will not get synchronisation!
7. At the start of the minute, the clock should start collecting data,
and if so it will start flashing the green LED rapidly. Look for any
LED activity at the start of the minute, using a known time source
as the reference.
8. After 60 seconds of gathering data, the clock will illuminate the
green LED, set the time and switch the tubes back on.
9. Once the system has been seen to work correctly, you can
experiment with the antenna in different locations, and it may be
possible to have the tubes stay on for time synchonisation.
10. Many other electrical applicances such as TVs and mobile
phones reception when in close proximity. Metal objects cause
reception problems too Place and design your case so the antenna
is as far away from the PCB as possible.
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