This manual covers Ericsson and General Electric products manufactured and
sold by Ericsson Inc.
NOTICE!
Repairs to this equipment should be made only by an authorized service
technician or facility designated by the supplier. Any repairs, alterations or
substitution of recommended parts made by the user to th is equipment not
approved by the manufacturer could void the user’s authority to operate the
equipment in addition to the manufacturer’s warranty.
NOTICE!
The software contained in this device is copyrighted by Ericsson Inc.
Unpublished rights are reserved under the copyright laws of the United
States.
This manual is published b y
changes to this manual necessitated by typographical errors, inaccuracies of current
information, or improvem ents to program s and/or equip ment, may be made by
Inc.
, at any time and without notice. Such changes will be incorporated into new editions
of this manual. No part of this manual may be reproduced or transmitted in any form
or by any means, electronic or mechanical, including photocopying and recording, for
any purpose, without the express written permission of
The operator of any mobile radio should be aware of certain hazards
common to the operation of vehicular radio transmissions.
A list of possible hazards are:
1.Explosive Atmosphere s
Just as it is dangerous to fuel a vehicle with the motor running, be
sure to turn the radio off while fueling the vehicle. Do not carry
containers of fuel in the trunk.
2.Interference to Vehicular Electronics Systems
Electronic fuel injection systems, electronic anti skid braking systems, etc., are typical of the type of electronic devices that may
malfunction due to the lack of protection from radio frequency energy
present when transmitting. If the vehicle contains such equipment,
consult the dealer for the make of the vehicle and enlist his aid in
determining if such electronic circuits perform normally when the
radio is transmitting.
3.Dynamite Blasting Caps
Dynamite blasting caps may be caused to explode by operating a radio
within 500 feet of the blasting ca ps. Always obey the " Turn Off T woWay Radios" signs posted where dynamite is being used. When
transporting blasting caps in your vehicle:
a.Carry the blasting caps in a closed metal box with a soft lining.
b.Leave the radio OFF whenever the blasting caps are be ing put
into or removed from the vehicle.
4.Radio Frequency Energy
To prevent burns or related physical injury from radio frequency
energy, do n ot operate the transmitter when anyone outside of the
vehicle is within two feet of the antenna.
5.Liquefied (LP) Gas Powered Vehicles
Mobile radio installations in vehicles powered by liquefied petroleum
gas with the LP gas container in the trunk or other sealed-off space
4
within the interior of the vehicle must conform to the National Fire
Protection Association standard (NEPA) 58 which requires that:
a.The space containing the radio equipment shall be isolated by a
seal from the space containing the LP gas container and its
fittings.
b.Outside filling connections shall be used for the LP gas container .
c.The LP gas container shall be vented to the outside of the vehicle.
SAFE DRIVING RECOMMENDATIONS FOR USERS OF MOBILE
RADIOS*
Read the literature on the safe operation of the radio.
• Keep both hands on the steering wheel and the microphone in its cradle
whenever the vehicle is in motion.
• Place calls only when vehicle is stopped. Use recall dialing to speed the
time it takes to call.
• When talking from a moving vehicle is unavoidable, drive in the slower
lane. Keep conversations brief.
• If conversation requires taking notes or complex thought, stop the
vehicle in a safe place and continue the call.
Whenever using a mobile radio exercise caution.
*As recommended by the AAA
5
OPERATING PROCEDURES
Two-way FM radio systems must be operated in accordance with the rules
and regulations of the Federal Communications Commission (FCC). Operators
of two-way radio equipment must be thoroughly familiar with the rules that
apply to the intended type of radio operation. Following these rules will help
to eliminate confusion, assure the most eff icient use of e xisting radio channels,
and result in a smoothly functioning radio network. When using this two-way
radio remember these rules:
1.It is a violation of FCC rules to interrupt any distress or emergency
message. As the radio operates in much the same way as a te lephone
"party line", always listen to make sure that the line is clear - that no
one else in on t he air - befo re sending mes sages. If s omeone is se nding
an emergency message - such as reporting a fire, or asking fo r help
in an accident - KEEP OFF THE AIR! Emergency calls have
priority over all other messages.
2.Use of profane or obscene language is prohibited by Federal law.
3.It is against the law to send false call letters, or a false distress or
emergency message.
4.The FCC requires that conversations be kept brief and confined to
business. To save time, use coded messages whenever possible.
5.Using a radio to sen d per son al m essa ge s (except in an emergency) is
a violation of the FCC rules. Send only those messages that are
essential for business operation.
6.It is against F edera l la w to re peat o r othe rwise m ake kno wn anyth ing
overheard on the radio. Conversations between others sharing a
channel must be regarded as confidential.
7.The FCC requires the operator to identify himself at certain times by
means of call letters. Refer to the rules that apply to the particular type
of operation for the pro per procedure.
8.No changes or adju stment s sha ll b e made to t he eq uipme nt e xcept by
an authorized or certified electronics technician.
6
INTRODUCTION
This manual describes how to use the MDX Conventional Mobile Radio.
The MDX is a synthesized, microprocessor-based, high performance simplex
mobile FM radio providing reliable two-way communications. Dire ct mobile
to mobile communication, when out of repeater range, is also provided.
In the Conventional mode, the user selects a channel and directly
communicates on that channel. In this mode, a system refers to a set of channels
and a channel is a transmit/receive radio frequency pair.
The exact operation of the radio will depend on the operating mode, the
radio’s programming, and the particular radio system. Most features described
in this manual ma y be ena ble d or di sa ble d th ro ugh p rogr am min g. Cons ult the
system administr ator f or the partic ular featu res th at ar e prog rammed into your
MDX radio.
The following feature encrypted options are standard with the MDX
conventional mobile radio:
PMPL3MSerial Control Unit (Control Head Operation)
PMPL3KScan, Dual Priority
PMPL3F16 channel operation
PMPL3G32 channel operation
PMPL3H64 channel operation
PMPL3J128 channel opera ti on
The following feature encrypted options can also be ordered:
PMPL3CType 99 Decode
PMPL3DPublic Address and External Speaker Switch (Re-
quires option PMSU5A)
PMPL3EEmergency (GE-STAR) and GE-STAR ANI
7
8-Character
Alphanumeric Dot
Matrix LED
allows you to identify
channel selections by
descriptive names.
Names, menu options, and
status information are
displayed here.
Scan Button
enables scan
operation for the
PWR
Volume Up/Down
Ramp
sets the volume
of the received audio.
selected system.
MENU
button allows access
to functions and options,
including scan add/delete for
modifying the radio’s scan
list and alarm on/off for the
external alarm option that
uses your horn or head lights
to signal an incoming call.
Emergency ID/ Alarm
(optional
sends an emergency
(GESTAR) alert and
identifying code to the
dispatcher. If no emergency
function is required, this can
be programmed as a
"HOME" switch.
)
Channel/SEL
Ramp
scrolls through
the names of channels
programmed into the
radio, displaying them
on the Dot Matrix
display.
8
Two Flex Keys
give you one-touch
access to the menu or
optional features.
Optional keycaps are
available to identify
the functions of
pre-programmed
buttons, including T99
decode, Scan Add/
Delete, Public
Address, Home,
Private, External
Alarm, and display
brightness.
Front-Mounted
Microphone
Connector
easy access to the
microphone and
programming
capabilities.
System Key
through the names of
the system (groups of
channels) programmed into the radio,
displaying them on
the Dot Matrix display
Figure 1 - MDX SCAN Radio
provides
scrolls
Front Mount
Speaker
with 4 watts
of audio. An optional
10-watt external
speaker is also
available, for use in
noisy environments.
CONTROLS, INDICATORS, AND DISPLAYS
The MDX Conventional mobile radio contains ten buttons, an eight
character DOT MATRIX display and seven indicators (see Figure 1). In
addition, there are times when part of the eight character display is used to
display the radio status. Backlighting on buttons illuminate the Leg ends.
CONTROLS
POWERMomentary push-push switch. Press once to turn
the radio ON. Press again to turn the radio OFF .
VOLUMEThe momentary switches (auto ramping) VOL-
UME + and VOLUME -. Beeps each time the
VOLUME button is pressed, except when a call is
in process. Hold the button (up or down) to auto
ramp the volume.
MENUMomentary switch. The MENU button is used to
access options on the MDX mobile. Menu operation is coupled with the CHANNEL/SEL bu ttons
and the CLR button. To increment from one me nu
selection to the next, simply press and release the
MENU button. Press the CLR button to return to
normal operation. The menu choices are listed
below with a description of how to change the
choices (Note: You may have some or all of these
menu choices programmed in your radio, and they
may be programmed in a different order than presented here).
BACKLIGHT: Press the MENU button until
"BRIGHT" appears in the display. To change the
state of the backlight press the CHANNEL/SEL +
or - button.
PUBLIC ADDRESS: Press the MENU button
until "PUB ADDR" appears in the display. Press
PTT to transmit in PA mode.
SCAN ADD/DELETE: Press the MENU button
until "SCAN A/D" appears in the display. Use the
CHANNEL/SEL- button to step through the
group selections for the current system. Use the
CHANNEL/SEL + button to change the scan
state. An "S" is illuminated to the right of the
display if the group/channel has SCAN enabled.
9
CONTROLS, INDICATORS, AND DISPLAYS
8-Character
Alphanumeric Dot
Matrix LED
allows you to identify
channel selections by
descriptive names.
Menu options, and status
information are displayed
here.
MENU
button allows access
to functions and options,
including scan add/delete for
modifying the radio’s scan
list and alarm on/off for the
external alarm option that
uses your horn or head lights
to signal an incoming call.
Emergency ID/ Alarm
(optional
sends an emergency alert and
identifying code to the
dispatcher. If no emergency
function is required, this can
be programmed as a
"HOME" switch.
)
PWR
Volume
Channel/SEL
Ramp
System Switch
through the names of
the systems and/or
channels programmed into the radio,
displaying them on
the Dot Matrix
display.
scrolls
Scan Button
Two Flex Keys
give you one-touch
access to the menu or
optional features.
Optional keycaps are
available to identify
the functions of
pre-programmed
buttons, including
Scan Add/ De le te,
Public Address,
Home, Private,
External Alarm, and
display brightness.
Front-Mounted
Microphone
Connector
easy access to the
microphone and
programming
capabilities.
provides
System Keypad
10-watt external
speaker must be used
with the System
model.
10
Figure 2 - MDX System Radio
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