Maxon TM-4800 Instructions Manual
Operating Instructions
TM-4800 Mobile
800 MHz Transceiver
About Your TM-4800 Radio
Maxon's TM-4800 is a sophisticated microprocessorcontrolled transceiver which operates in the 800 MHz range.
Operation and functions for Maxon's TM-4800 radio are
described in this manual.
We urge you to thoroughly read this manual before
operating the radio.
The TM-4800 has been designed for ease of operation.
Many of the functions described in this manual are
dependent on the system in use. Your Maxon Dealer has
programmed the TM-4800 radio to optimize your
requirements.
Should you have any questions regarding the operation of
the radio, please consult your Maxon Dealer.
About Maxon America, Inc.
Maxon America, Inc. designs and manufactures professional
FM two-way radio equipment to serve a wide variety of
communication needs. Maxon produces equipment for the
Land Mobile Radio and Specialized Mobile Radio markets
(business, industrial, government and public safety).
Table of Contents
SECTION I - Model TM-4800 Radio
Safety Information 1
Unpacking Information 2
Installation Safeguards 3
TM-4800 Features 4
Quick Reference Guide 5
Description of Radio Components 6
Controls and Connectors 6
Function Keys 8
Display Information 9
TM-4800 Operation 10
Trunking and Conventional Mode 10
Channel Monitoring 10
System "Handshaking" 10
Transmitting 11
Receiving 12
T/A - Talk-Around 12
Transpond Mode 13
Scan Modes 14
General 14
System Scan 14
System Lockout 14
Group Scan 15
Auto Group Scan 15
Manual Group Scan 16
Transmitting While Scanning 16
Last Active (Floating) System and Group 16
"Home" System and Group 17
Scan Resume Delay 17
RX Priority 18
First Available System Scan 18
Trunking Supervisory Tones 19
Busy Tone 19
Intercept Tone 19
Clear-To-Talk 20
Key Press Tone 20
Display Messages 20
Transceiver Service 21
Extended Operations 22
FCC Licensing 23
TM-4800 Product Warranty 24
SECTION II - Model TMA-4474
About Your TMA-4474 Optional Microphone 27
Quick Reference Guide 28
Function Keys 30
Scan Modes 33
Manual System Scan 33
Manual Group Scan 33
Transmitting While Scanning 34
First Available System Scan 34
Telephone Calls 35
Placing a Telephone Call 35
Receiving a Telephone Call 37
Additional Telephone Calling Information 38
Entering Telephone Numbers 38
Clearing Telephone Numbers 39
To Store a Number in Memory 39
To Recall a Number Stored in Memory 39
Trunking Supervisory Tones 40
Busy Tone 40
Intercept Tone 40
Clear-To-Talk 41
Key Press Tone 41
Reorder Tone 41
Return Time Warning Tone 41
Conversation Time-Out Tone 42
Turn-Around Tone 42
System Ringback Tone 42
TMA-4474 Product Warranty 43
1
Safety Information
The Federal Communications Commission (FCC), with
its action in General Docket 79-144, March 13, 1985, has
adopted a safety standard for the human exposure to Radio
Frequency (RF) electromagnetic energy emitted by FCC
regulated equipment. Proper operation of this radio will
result in user exposure far below the Occupational Safety
and Health Act and Federal Communication Commission
limits.
DO NOT operate a mobile radio when someone outside the
vehicle is within two feet (0.6 meter) of the antenna.
DO NOT operate the radio near unshielded electrical
blasting caps or in an explosive atmosphere, unless it
is a type specifically designed and qualified for such use.
DO NOT operate the transmitter of any radio unless all RF
connectors are secure and any open connectors are properly
terminated.
DO NOT allow children to operate transmitter-equipped
radio equipment.
• For safe operation, all equipment must be properly
grounded.
• All equipment should be serviced only by a qualified
technician.
This device complies with Part 15 of the FCC rules.
Operation is subject to the condition that this device
does not cause harmful interference.
Unpacking Information
Remove and carefully inspect the contents of your package
for the following items:
• Radio
• Microphone
• DC power supply cord
• Mounting bracket, hardware
• Microphone hanger and hardware
• Operating instructions
If any items are missing, please contact your Maxon
Dealer.
2
Installation Safeguards
Some electronic fuel injection, anti-skid breaking systems,
cruise controls, and vehicle alarms may be prone to interference from radio frequency energy or may malfunction due to
a lack of protection from RF energy. If the vehicle contains
such equipment, consult the dealer or factory and enlist their
help in determining whether the electronics equipment in the
vehicle will operate properly when the radio is transmitting.
• Select a location for the radio which allows the user to see
and easily reach the microphone and radio controls.
DO NOT install the unit where it would interfere with the
proper operation of automatic collision protection
devices (air bags).
DO NOT install the unit where it would likely cause injury
in case of accident.
• After selecting a location for the radio, hold the mounting
bracket in place. Using the bracket as a template, mark
with a pencil the spots where the bracket securing
screws will be located.
• Before drilling holes in the vehicle, verify that there is
nothing that could be damaged or get in the way by
drilling and putting screws in this location.
NOTE: It is better to use existing passages in the dashboard, trunk, and floor for the routing cable, thus avoiding
excessive drilling.
NOTE: This radio is not intended for operation in a positive
ground vehicle.
A suitable antenna must be purchased for use with the radio.
Consult your Maxon Dealer for recommended Maxon
antennas.
3
4
TM-4800 Features
• Up to 10 systems selectable
• Up to 10 groups selectable per system
• System scan
• System lockout when scanning
• Group scan automatically or manually
• Programmable CTCSS and DCS squelch capability
• 7-character alpha-numeric LCD display with backlight
• Operation in both trunking and conventional modes
• Repeater talk-around (conventional and trunking modes)
• Automatic system ringback if system is busy
• Transmit inhibit with busy tone
• Clear-to-talk tone
• First available system scan (FASS)
• Optional microphone for telephone interconnect*
• Storage of up to 8 telephone numbers (of up to 14 digits in
length) *
*Functions only when using Maxon Model TMA-4474
(optional microphone with DTMF keypad).
NOTE: System setup determines the specific operation
of some of the above features. Refer to the descriptions
in this manual for more information.
V
5
• OFF
VOL
• MAX
V
GRP
LCK
T/A
SCN
V
SYS
V
Quick Reference Guide
Controls
Push-To-Talk bar (on microphone) places
transceiver in transmit mode
Turns transceiver On/Off and
adjusts VOLume
Changes SYStem number
LoCKs displayed System out of
scan sequence
Talk-Around bypasses system when out
of range of system
Initiates SCaNning mode
Changes GRouP number
Description of Radio Components
Controls and Connectors
TX/RX Indicator - Two color LED glows red when radio
is transmitting (TX) and green when radio is receiving (RX).
On/Off-Volume Control - Turning this knob clockwise
supplies power to the radio and increases volume level. A
counter-clockwise rotation decreases volume level. To turn
transceiver power off, rotate knob counter-clockwise
to detent.
Microphone Connector - Eight pin modular connector for
Maxon heavy duty microphone and optional DTMF microphone (model TMA-4474).
Function Keys - Used to select system and group; to
initiate system lockout, talk-around and scan modes.
6
Controls and Connectors, Continued
Antenna Connector - N-type connector. Must be
connected to a properly installed 50 ohm antenna.
Power Connector - Polarized plug for 13.8 VDC
NEGATIVE GROUND SYSTEMS ONLY.
Auxiliary Speaker Connector - A 3.5mm diameter
jack is provided for a 4 ohm auxiliary speaker.
7
Function Keys
SYS "System" Selector Keys - Pressing ▲ or ▼ selects the
next programmed system. Only programmed systems will be
displayed. System number selected is located on the left side
of display.
LCK "Lock" Key - Used to lock system or systems out of
the scan sequence so that they are not scanned. This function
is retained in memory and does not need to be re-entered
each time the radio is turned on. (Refer to "System Lockout"
for more information).
T/A "Talk-Around" Key - Places the TM-4800 into the
talk-around mode on trunking and conventional systems
(Dealer programmable option). Allows direct radio-to-radio
communication when out of range of the system.
SCN "Scan" Key - Pressing this key initiates the scan
feature. When the SCN key is pressed followed by pressing
either the SYS (system) or GRP (group) key, system scan or
group scan is enabled. (See "Scan Modes" for more
information).
GRP "Group" Selector Key - Pressing
▲ or ▼ changes the
selected group. Only programmed groups will be displayed.
Group number selected is located on the right side of display.
Group name or identifier is shown in main body of display.
8
SYS GRP
▼
SCN
LCK
T/A
▲
▲
▼
Display Information
Alpha-numeric Display - In the normal mode the
7-character display identifies a selected system/group
and those operating modes or error conditions as
described in "Display Messages".
SYS (System) -Displays above the system number
LOCK -Indicates that the displayed system has
been locked out of the scan sequence
or a system or systems have been locked
out of scan
FASS -Indicates First Available System Scan
has been enabled
PHONE -Indicates that the telephone mode has been
selected*
-Indicates that the displayed group is
programmed for telephone interconnect
GRP (Group) -Displays above the group number
-Indicates that there are overflow digits (the
telephone number is longer than 7-digits)*
SCAN -Indicates that the scan mode has been
initiated
CALL -Indicates that a call has been received
BUSY -Indicates that the channel (conventional)
or the system/group (trunking) you have
selected is busy
* Displays only when using optional Maxon TMA-4474 microphone with DTMF keypad.
9
TM-4800 Operation
Trunking and Conventional Mode
Your Maxon TM-4800 may be programmed to operate in
both trunking and conventional modes. Each system can be
individually programmed to operate in either trunking or
conventional systems. There are only a few differences in
their operation and these are detailed as follows.
Channel Monitoring
While on a trunking system, channel monitoring is
performed automatically by the radio. In accordance with
the FCC Rules, while operating on a conventional system
the channel must be monitored prior to transmitting. Simply
remove the microphone from the hanger bracket to monitor.
In both trunking and conventional systems, operation may
vary from system to system. Your Maxon Dealer will be
able to assist with particular operational parameters and
procedures.
System "Handshaking"
In a trunking system, when the P-T-T bar on microphone is
pressed, the red TX/RX indicator flashes momentarily to
allow the transceiver and system repeater to connect properly.
When the red TX/RX indicator glows steadily, voice
transmission may begin. If your Maxon Dealer has enabled
the clear-to-talk tone option, the radio will emit a short tone
signal, then voice transmission may occur. In conventional
systems, there is no system "handshaking" and voice
transmission may start immediately.
10
Transmitting
A. Turn power on and rotate control clockwise to desired
volume level.
B. Press the SYS and GRP keys until the desired system
and group are displayed.
C. If a conventional system is selected, the channel must be
monitored before transmitting.
D. Press and hold the P-T-T bar on the side of the
microphone. Listen for the clear-to-talk tone (or
wait for the TX/RX indicator to glow steady red).
Hold the microphone 1 or 2 inches from your
mouth, speaking clearly and distinctly. (If a busy,
or intercept tone is heard, refer to "Trunking
Supervisory Tones" descriptions for more
information).
E. Release the P-T-T bar on the microphone as soon as the
message is complete and listen for a response.
The P-T-T bar must be released to listen.
11
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