Using The C-Fax - BHM Electronics 3 C-FAX User Handbook Manual

Using the C-Fax

Switching On
Make sure power plug and aerial connections have been made and that a roll of paper is
properly inserted in the C-Fax, as described on pages 4 to 7.
Move the power switch (number 7 in the picture on the previous page) down. If your C-Fax
has an internal receiver the channel display (9) should show the current channel number,
location and frequency the C-Fax is listening to.
for example:
This indicates that the receiver is set to channel 3, which transmits from Auckland on a
frequency of 13550.5 kHz (kilohertz) using the call sign ZKLF.
Selecting a Channel
To change the channel use the two channel selection buttons (10) to move up or down the
list. Refer to the frequency list starting on page 18 to find the channel number of a station
transmitting near you, then change to this channel. If you are using an external receiver you
must manually enter a frequency into your receiver.
The yellow data light (8) should be on or flickering. This indicates a signal is present.
If it is not already on, turn on the audio by switching the Audio switch (1) up. You should be
able to hear the received signal.
If you hear a continuous tone, this is generally a resting tone, a signal many stations send
between maps. If you can hear a signal quickly changing between two tones then a picture is
being sent. Try all the different frequencies for your local station to find the signal which
sounds loudest and has the least static in it.
Printing a Picture
Set the Start switch (5) to the middle position for automatic stop and start.
When a picture is sent it is preceded by a start signal, telling the receiver to start printing.
This is heard as a tone lasting from 5 to 10 seconds. Next the transmitting station sends the
alignment signal which synchronises the picture being sent with that being printed. This
usually sounds as two tones, a very short tone and a longer half second tone, repeated for 30
seconds. Following this is the actual picture, which is two tones alternating randomly, one
tone represents the white parts of the picture, the other tone is used for the black parts. The
3 Auckland
ZKLF 13550.5kHz
8