HF radio transmission
62 2110 SSB Transceiver Getting Started Guide
Networks and scanning
A network is two or more stations that use the same
frequencies and call system to communicate.
The frequencies are allocated by a government authority and
enable the network to maintain HF communication throughout
the day and night.
The call system is the method the network uses to make and
receive calls. For example, in networks that use the Codan
Selcall call system to make calls, the user enters the address of
the station they want to call, then selects the channel/mode on
which to make the call. In networks that use the ALE/CALM
call system, the transceiver selects the best channel/mode for
the call.
The transceiver can be set to scan the channel/modes used by
your network to detect incoming calls. It is recommended that
when you are not using the transceiver to communicate you
switch scanning on. This ensures that you can receive calls
from stations in your network.
Etiquette for the use of HF radio
There is a standard procedure for communicating over HF
radio. Before you begin transmitting, switch off scanning,
select a channel, then press PTT on the handset to initiate
tuning of the antenna. Listen to the channel that you are going
to use and ensure that there is no voice or data communication
taking place. You may need to wait until the channel is clear or
select another channel.
When you first establish communication with another station
it is customary to state their call sign and then your own using
the phonetic alphabet (see Table 8 on page 63). For example:
‘Alpha Bravo One, this is Alpha Bravo Two. Do you receive
me? Over.’
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