Nixie Tube Clock ‘Frank 3’
Issue 5 (1 Jan 2012)
www.pvelectronics.co.uk
- 28 -
7.2 DCF / WWVB / MSF Synchronisation.
An optional receiver and 3 metre cable is available. The Radio
Frequency Time (RFT) receiver module plugs into the mini-DIN
socket on the rear of the PCB.
7.3 Connecting the DCF / WWVB / MSF receiver.
The clock is designed to be used with Symtrik RFT time receiver
module type SYM-RFT-xx
These modules feature an on-board indicator LED to indicate the
regular pulses from the time transmitter. This is very useful in
setting up the module, to determine if a good signal has been
found. The modules output coded time information in inverted
format and this is the format the clock can decode.
An additional feature of the modules is the PON pin, which is used
to place the module is an ultra low power standby mode when not
being used for time seek.
If you are using our module and 3 metre extension cable, proceed
to step 8.4. If you are wiring in the module close to the main clock
PCB or by direct soldering to the clock PCB pads, refer to step 8.5.
Some Notes on WWVB / DCF / MSF Reception:
Many other electrical applicances such as TVs and Mobile phones
reception when in close proximity. Metal objects cause reception
problems too. It is suggested to start off with the antenna by a
window, in the approximate direction of the signal Do not point the
antenna at the direction of the signal, but have the antenna side-
on to the signal direction.
Once a good signal has been obtained, try different locations, and
progressively further from the window.
Place and design your case so the antenna is as far away from the
PCB as possible.
