Operator's Manual

DATRON WORLD COMMUNICATIONS INC.
Guardian VHF Mobile
4
Encryption Algorithm
Standard Guardian software includes an SBCF analog DES encryption, usable
on 25 kHz wideband channels.
Squelch Options
Analog squelch options are none, continuous tone-coded squelch system
(CTCSS), and digital-coded squelch (DCS). Digital squelch options are none,
network access code (NAC), and talk-group identifier (TGID) including
individual call.
Emergency Call
This feature is used when the radio is connected to an external, user-supplied
emergency switch, and when programmed for emergency operation. In alert
mode, emergency messages display and a beep is heard every time the radio
transmits the emergency message. In silent mode, emergency transmissions are
made but the radio does not beep and emergency messages do not display.
Alert Tones
Audible tones provide important information about the radio’s operating state
or condition:
Tone pitch Tone length Description
Low Beep Button press error/failed self-test/talk timeout
warning/empty channel
Low Continuous Talk time-out/talk inhibit/invalid mode/radio locked
Medium Beep Button press/passed self-test/receiving in clear voice
Medium Pulse Emergency call mode/key error
High Beep Low input voltage (vehicle power)
High Pulse Individual call