User's Manual

HF NETWORKS
OVERVIEW OF HF NETWORKS
130 ENVOY™ TRANSCEIVER REFERENCE MANUAL
Overview of HF networks
An HF network is two or more stations that use the same scan table and call system to
communicate. This simplifies communication because each station knows the method
with which they can make and scan for incoming calls, and the frequencies they can
use. To access information about the HF networks programmed in the transceiver,
navigate to User Data > HF Networks.
HF networks are based on call systems. A call system is a method of making and
receiving calls. For example, if you are in an HF network that uses the Codan Selcall
or Open Selcall call system, you make calls by entering the address of the station that
you want to call, then selecting the channel/mode that you want to use. When your call
is detected by the called station, that station rings to alert the operator. In an
ALE/CALM HF network, you make calls by entering the address of the station that
you want to call. The transceiver selects the best channel on which to make the call.
When you add an HF network, the transceiver prompts you to select a call system,
then prompts you for further information based on your selection.
Figure 41 shows an example of the information required to add HF networks based on
the Codan Selcall and ALE/CALM call systems.
NOTE: The call systems from which you can select depend on the options
installed in the transceiver.
The transceiver can be set to scan the scan tables associated with your HF network to
detect incoming calls. It is recommended that scanning is switched on when you are
not using the transceiver to communicate. This ensures that you can receive calls from
stations in your HF radio communication network.
Figure 41: Information for an HF network
HF Networks
Selcall Call System:
Selcall Self Address:
Global:
Scan Tables:
Preamble Length:
Send Preamble:
Privacy Mode:
Rx Only:
Codan Selcall
1111
Not selected
Table 1
Auto
Always
None
Not selected
CALM
Call System:
ALE Self Address:
Global:
Scan Tables:
Preamble Length:
Send Preamble:
Sounding Interval:
Privacy Mode:
Privacy Password:
Rx Only:
ALE/CALM
BASE1
Selected
All
Auto
Always
Disabled
Group
Not selected
*****
Privacy Password: <Empty>