User's Manual

HF NETWORKS
ENTRIES FOR AN HF NETWORK
132 ENVOY™ TRANSCEIVER REFERENCE MANUAL
Entries for an HF network
HF network name
An HF network has a name that uniquely identifies it so that it may be easily selected
in other areas of the user interface of the control point.
Call system
A call system applies to all types of HF networks. It is the method used by the HF
network to make and receive calls, for example, Codan Selcall, Open Selcall, or
ALE/CALM. The call systems from which you can select depend on the options
installed in the transceiver.
If your HF network uses the Codan Selcall or Open Selcall call system, you can make
calls by selecting an appropriate channel/mode then entering the address of the station
that you want to call as part of the calling process. When your call is detected by that
station, that station rings to alert the operator. If your HF network uses the
ALE/CALM call system, the transceiver can select the best channel/mode for you.
A Codan Selcall HF network can receive calls sent from a transceiver using the Open
Selcall protocol. If you want to be able to make calls to transceivers that use the Open
Selcall protocol, you must set up an Open Selcall HF network to use with these calls.
CAUTION: You should be aware of any restrictions placed on HF network names
in your transceiver when it is used with a Codan HF data modem, a
radio/telephone interconnect, UUPlus© software, or InterNav©
software.
NOTE: The transceiver is able to scan a maximum of 100 channels at a time.
If the total number of channels in all the scan tables that are associated
with the HF network exceeds 100, only 100 of the channels are
scanned.
CAUTION: Any station that is tuned to your frequency and has mute switched off
can listen to your voice conversation, unless you are using one of
Codan’s encryption options.
FED-STD-1045 ALE/CALM
If you want to use the ALE/CALM call system to automate the selection of channels,
you must install the FED-STD-1045 ALE/CALM option in the transceiver. CALM
stands for Codan Automated Link Management.
The FED-STD-1045 ALE/CALM option enables the transceiver to test the signal
propagation qualities of your channels using soundings, and build a profile of each
channel’s suitability for use at different times of the day and night. The BER and
SINAD information collected during sounding activity is stored in the transceiver
using a 24-hour period LQA database. With this information, the transceiver is able
to select the most suitable channel/mode for you when you make a call.