Maxon TM-4800 User manual

Operating Instructions
TM-4800 Mobile
800 MHz Transceiver

About Your TM-4800 Radio
Maxon's TM-4800 is a sophisticated microprocessor-
controlled 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
UnpackingInformation 2
InstallationSafeguards 3
TM-4800 Features 4
Quick Reference Guide 5
Description of Radio Components 6
Controls and Connectors 6
Function Keys 8
DisplayInformation 9
TM-4800 Operation 10
TrunkingandConventional Mode 10
ChannelMonitoring 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
TransmittingWhileScanning 16
Last Active (Floating) System and Group 16
"Home" System and Group 17
Scan Resume Delay 17
RXPriority 18
First Available System Scan 18
TrunkingSupervisoryTones 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
TransmittingWhileScanning 34
First Available System Scan 34
TelephoneCalls 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
TrunkingSupervisoryTones 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
radioequipment.
• 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 interfer-
ence 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 dash-
board, trunk, and floor for the routing cable, thus avoiding
excessivedrilling.
NOTE: This radio is not intended for operation in a positive
groundvehicle.
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 GRouPnumber

Description of Radio Components
ControlsandConnectors
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 micro-
phone (model TMA-4474).
Function Keys - Used to select system and group; to
initiate system lockout, talk-around and scan modes.
6

ControlsandConnectors,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

FunctionKeys
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
ofdisplay.
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
▲▲
▼

DisplayInformation
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 micro-
phone with DTMF keypad.
9

TM-4800 Operation
TrunkingandConventionalMode
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.
ChannelMonitoring
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.
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Transmitting
A. Turn power on and rotate control clockwise to desired
volumelevel.
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
monitoredbeforetransmitting.
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

12
Receiving
A. Turn power on and rotate control clockwise to desired
volumelevel.
B. Press the SYS and GRP keys until the desired system
and group are displayed.
C. When a message is received, the TX/RX indicator will
glow steady green.
D. To respond 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).
NOTE: If scanning, be sure to respond before scanning
resumes. If you do not, another call may be received and the
selected system and group may have to be changed. Refer to
system scan description for more information.
T/A-Talk-Around
Talk-around mode, if enabled by your Maxon Dealer, allows
you to talk directly from radio to radio. This is useful when
your radios are out of range of any system. If the radio can
receive the system transmissions, then talk-around may be
disabled.
A. Press the T/A key. The LCD display will indicate the
word SIMPLEX in place of the unique system /
groupidentifier.

B. Transmit and receive as described in "Transmitting".
C. To return to trunking or conventional operation press the
T/A key again.
TranspondMode
If transpond has been enabled by your Dealer, your radio
will automatically send (transpond) an acknowledgment to
the system indicating that your radio has received a transmis-
sion. Transpond is a Dealer programmable option.
13

Scan Modes
General
Both system scan and group scan are available in Maxon's
TM-4800 radio. Although your Maxon Dealer will explain
which option(s) he has programmed for you, the following is
a description of each.
System Scan
System scan is initiated by pressing SCN,then SYS. Scan
mode is indicated by the word "SCAN" displayed in the
upper center portion of the display. When scanning is
actually occurring, the words "IN SCAN" appear in the
display in place of the unique group identifier. In addition,
the system numbers are incremented. Scanning is sequential
through all trunking and conventional systems, unless they
are locked out of scan as described under "System Lockout".
When an incoming call is detected, scanning stops and the
call is received. The display will indicate the system and
group identifier from which the call was received and the
word "SCAN" in the upper center portion of the display.
When the incoming call is complete, scanning resumes after
a predetermined pause. To exit scan mode, press SCN and
hold for 2 seconds. (See "Scan Resume Delay" for
additional information regarding the pause).
System Lockout
All trunking and conventional systems are scanned in system
scan mode. If you desire not to scan a particular system,
select that system with the SYS key and press the LCK key.
The word "LOCK" appears in the upper left portion of the
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display and that system will be deleted from the scan list.
When system scan is initiated, the word "LOCK" will be
shown in the upper left portion of the display along with the
words "IN SCAN" denoting a system or systems have been
locked out of scan. To restore a system to the scan list
manually select the "LOCKed" system and press the LCK
key. The word "LOCK" will disappear and the system
will now be scanned while in the system scan mode. The
"LOCK" information is stored in memory and will not be
affected by turning the power switch off.
GroupScan
There are two different ways the TM-4800 does group
scanning. Your Maxon Dealer programs these functions into
the radio during initial setup. Only those groups your Dealer
has enabled for group scan can be scanned. Group scan is
not available in conventional systems.
AutoGroupScan
There is no action required to initiate auto group scan.
Whenever a system is selected that is programmed for auto
group scan, those groups enabled will automatically be
scanned. When an incoming call on any enabled group is
detected, the radio will switch to this group, display the
group number, and unique identifier. The radio will continue
to display this group until a message comes from another
enabled group; the SYS key is pressed; or the GRP key is
pressed.
15

ManualGroupScan
To initiate manual group scan press SCN, then GRP.
Scan mode is indicated by the word "SCAN" shown in
the upper center portion of the display. When group scan is
actually occurring, the words "IN SCAN" appear in the
display in place of the unique group identifier. Group scan
occurs only on those groups enabled by your Maxon
Dealer for the selected system. When an incoming call is
detected, scanning stops and the incoming call is received.
The display changes to indicate the group identifier on
which the call was received and the word "SCAN" in the
upper center portion of the display remains. When the
incoming call is complete, after a brief pause, scanning
resumes. To exit group scan mode, press SCN and hold
for 2 seconds. (See "Scan Resume Delay" for additional
information regarding the pause).
TransmittingWhileScanning
When a message is transmitted while scanning (i.e., the
words "IN SCAN" show on the display), Dealer
programming determines if it is transmitted on the "Last
Active" (floating) or on a pre-set "Home" system and group.
The following describes operation for each configuration.
Last Active (Floating) System and Group
During scan (i.e., the words "IN SCAN" show on the
display) when you press the P-T-T bar on the microphone,
you will transmit on the system and group that were selected
prior to entering scan mode. Once a signal is received, you
will always transmit on that last system group received.
Last active (floating) programming allows you to respond
(transmit) to an incoming call during scan mode
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