User's Manual

DEFINITIONS
GLOSSARY
ENVOY™ TRANSCEIVER REFERENCE MANUAL 431
shielding A metallic barrier that is positioned between a noise source and the
transceiver to minimise noise interference.
sideband A band of frequencies that is above or below a modulated carrier
frequency.
standing wave ratio
(SWR)
The ratio of forward and reflected powers between a transmitter and its
antenna load, which can be measured by an SWR meter.
station A point of communication consisting of a transceiver, a power supply, an
antenna, control and accessory devices, ancillary equipment, and
appropriate connecting cables.
transceiver An RFU, handset, speaker, and appropriate connecting cables.
transmit frequency A frequency that carries modulated information to a remote transceiver.
Wildcard call An ALE address syntax used to broadcast to any station that is tuned to the
same frequency in an ALE/CALM HF network, or scanning the channels
in the scan table(s) associated with the HF network. The Wildcard address
syntax, which ALE stations recognise, uses the wildcard character ? as a
placeholder for characters within an address of a called station. A multiple
Wildcard call uses multiple wildcard addresses in the one call. Stations
with matching addresses respond to the call.
The Wildcard address syntax may be used in Emergency, Message, Phone,
Selective, and Send Position calls if the MIL-STD-188-141B ALE option
is installed.
This term... Means...