E May 2005 Modifed MPE information for FCC compliance.
M/A-COM Technical Publications would particularly appreciate feedback on any
errors found in this document and suggestions on how the document could be
improved. Submit your comments and suggestions to:
Wireless Systems Business Unit or fax your comments to: (434) 455-6851
M/A-COM, Inc.
Technical Publications or e-mail us at: techpubs@tycoelectronics.com
221 Jefferson Ridge Parkway
Lynchburg, VA 24501
Replaced “blasting caps” hazard information with OSHA-standard
blasting caps hazard information.
Updated safety information, personality section, menu structure
figure, log-in and log-off sections, radio tones section, stealth mode
section, V-TAC SOI mode section, selective call section,
emergency communications section, and DTMF microphone
section. Added information on telephone interconnect calls, GPS
coordinates display, V-TAC XCOV-TG mode operations, and
engineering data display.
Updated emergency communications and manual encryption
sections. Separated selective alert subsection from selective call
section.
CREDITS
This device is made under license under one or more of the following US patents: 4,590,473;
4,636,791; 5,148,482; 5,185,796; 5,271,017; 5,377,229; 4,716,407; 4,972,460; 5,502,767;
5,146,497; 5,164,986; 5,185,795.
The voice coding technology embodied in this product is protected by intellectual property rights
including patent rights, copyrights, and trade secrets of Digital Voice Systems, Inc. The user of
this technology is explicitly prohibited from attempting to decompile, reverse engineer, or
disassemble the Object Code, or in any other way convert the Object Code into human-readable
form.
OpenSky is a registered trademark of M/A-COM, Inc.
All other brand and product names are trademarks, registered trademarks or service marks of their
respective holders.
NOTICE!
This manual covers M/A-COM products manufactured and sold by M/A-COM, Inc.
Repairs to this equipment should be made only by an authorized service technician or facility
designated by the supplier. Any repairs, alterations or substitutions of recommended parts made
by the user to this equipment not approved by the manufacturer could void the user's authority to
operate the equipment in addition to the manufacturer's warranty.
This manual is published by M/A-COM, Inc., without any warranty. Improvements and changes
to this manual necessitated by typographical errors, inaccuracies of current information, or
improvements to programs and/or equipment, may be made by M/A-COM, 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 M/A-COM, Inc.
The M-803 digital mobile radio generates RF
electromagnetic energy during transmit mode. This radio
is designed for and classified as “Occupational Use
Only”, meaning it must be used only during the course of
employment by individuals aware of the hazards and the
WARNING
This radio has been tested and complies with the FCC RF exposure limits for
“Occupational Use Only.” In addition, the M-803 digital mobile radio
complies with the following Standards and Guidelines with regard to RF
energy and electromagnetic energy levels and evaluation of such levels for
exposure to humans:
Compliance with FCC Guidelines for Human Exposure to Radio
Frequency Electromagnetic Fields.
•American National Standards Institute (C95.1 – 1992), IEEE Standard for
Safety Levels with Respect to Human Exposure to Radio Frequency
Electromagnetic Fields, 3kHz to 300 GHz.
Use of this radio as described below will result in user exposure substantially
below the FCC recommended limits for human exposure to Radio Frequency
Electromagnetic energy.
ways to minimize such hazards. This radio is NOT
intended for use by the “General Population” in an
uncontrolled environment.
Before operating this radio:
•Do not operate this radio if any of the RF connectors are not secure or if
open connections are not properly terminated.
•Do not operate this radio near electrical blasting caps or in an explosive
atmosphere.
This radio has been tested and complies with the FCC RF exposure limits for
Uncontrolled Exposure and Occupational exposure. The difference is in the
minimum safe distance that people must be away from the antenna when
transmitting RF energy. To assure optimal radio performance and that human
exposure to RF electromagnetic energy is within the guidelines, transmit only
when people are at least the minimum distance away from a properly installed
antenna. Refer to Table 1-1 for the minimal allowable distances.
Note that the M-803 can transmit without pressing the PTT as part of the
normal registration process the radio periodically performs. The TX light
behind the SELECT button on the front panel will glow red when this or any
transmission is in process.
6
Table 1-1: Minimum Allowable Distances
RATED POWER ANTENNA
GAIN
43.9 dBm max
41.8 dBm nominal
43.9 dBm max
41.8 dBm nominal
*Refers to Controlled (Occupational Use) and Uncontrolled (General Population
Use) exposure.
0 dBd 62 cm
3 dBd 87.6 cm
MPE1
UNCONTROLLED*
(24.4 inches)
(34.5 inches)
MPE
CONTROLLED*
27.7 cm
(10.9 inches)
39.2 cm
(15.4 inches)
The radio must be serviced and installed only by a qualified technician. Be
sure that the radio is properly grounded according to the installation
instructions.
Before jump starting or changing the vehicle battery, it is
strongly suggested that DC power connector(s) be
disconnected from the radio equipment (including control
CAUTION
head(s), if any). This will prevent voltage surges that may
occur from damaging the radio equipment.
This equipment generates or uses radio frequency energy. Changes or
modifications to this equipment may cause harmful interference unless the
modifications are expressly approved in the instruction manual. The user
could lose the authority to operate this equipment if an unauthorized change or
modification is made.
This equipment has been tested and found to comply with the limits for a
Class B digital device pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation.
Government law prohibits the operation of unlicensed transmitters within the
territories under government control. Illegal operation is punishable by a fine,
imprisonment, or both. Refer service to qualified technicians only. Do not
operate the transceiver in explosive atmospheres (gases, dust, fumes, etc.).
1
The MPE radius is the minimum distance from the antenna axis (distances listed in Table 1-1)
that persons should maintain in order to avoid RF exposure higher than the allowable MPE level
set by the FCC.
7
1.1 OCCUPATIONAL SAFETY GUIDELINES AND
SAFETY TRAINING INFORMATION
The M-803 mobile radio transmits using a remote antenna. When it is ON, it
receives and transmits radio frequency (RF) signals. In 1996, the Federal
Communications Commission (FCC) adopted RF exposure guidelines with
safety limits, based on the recommended limits of the National Council on
Radiation Protection and Measurements (NCRP) and the American National
Safety Institute (ANSI).
The design of the M-803 mobile radio complies with the FCC guidelines for
Occupational/Controlled exposure to RF electromagnetic fields, as measured
by the Maximum Permissible Exposure (MPE). To assure optimal
performance and human exposure to RF electromagnetic energy is within the
FCC guidelines, always adhere to the following:
1. The push-to-talk button should only be depressed when intending to send
a voice message.
2. The radio should only be used for necessary work related
communications.
3. The radio should only be used by authorized and trained personnel and
should not be operated by children.
4. Do not operate the radio in explosive atmospheres (gases, dust, fumes,
etc.) or near explosive blasting caps.
5. Do not attempt any unauthorized modification to the radio. Changes or
modifications to the radio may cause harmful interference. Only qualified
personnel should service the radio.
6. Always use M/A-COM authorized accessories (antennas, control heads,
speakers/microphones, etc.). Use of unauthorized accessories can cause
the FCC RF exposure compliance requirements to be exceeded.
The information listed above provides the user with the information
needed to make him or her aware of a RF exposure, and what to do to
assure that this radio operates within the FCC exposure limits of this
radio.
8
1.2 COMMON HAZARDS
The operator of any mobile radio should be aware of certain hazards common
to the operation of vehicular radio transmissions. Possible hazards are:
1. Explosive Atmospheres
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 of the vehicle if the radio is mounted in the trunk.
2. Interference To Vehicular Electronic Systems
Electronic fuel injection systems, electronic anti-skid braking systems,
electronic cruise control systems, etc., are typical types of electronic devices
that can malfunction due to the lack of protection from radio frequency (RF)
energy present when transmitting. If the vehicle contains such equipment,
consult the dealer for the make of vehicle and enlist his aid in determining if
such electronic circuits perform normally when the radio is transmitting.
3. Electric Blasting Caps
To prevent accidental detonation of electric blasting caps, DO NOT use twoway radios within 1000 feet (304.8 meters) of blasting operations. Always
obey the "Turn Off Two-Way Radios" signs posted where electric blasting
caps are being used. (OSHA Standard: 1926.900)
4. Radio Frequency Energy
To prevent burns or related physical injury from radio frequency energy, do
not operate the transmitter when anyone outside of the vehicle is within the
minimum safe distance from the antenna as specified in Table 1-1.
5. Vehicles Powered By Liquefied Petroleum (LP) Gas
Radio installation in vehicles powered by liquefied petroleum gas, where the
LP gas container is located in the trunk or other sealed-off space within the
interior of the vehicle, must conform to the National Fire Protection
Association Standard NFPA 58. This requires:
a. The space containing radio equipment is isolated by a seal from the
space containing the LP gas container and its fittings.
b. Outside filling connections are used for the LP gas container.
c. The LP gas container space is vented to the outside of the vehicle.
6. Vehicles Equipped With Airbags
For driver and passenger safety, avoid mounting the control head (or any other
component) above or near airbag deployment areas. In addition to driver-side
and passenger-side front-impact airbags, some vehicles may also be equipped
with side-impact airbags. For occupant safety, verify the location of all airbags
within the vehicle before installing the radio equipment.
9
2 PRODUCT DESCRIPTION
The M-803 digital mobile radio is a hardware component of the OpenSky®
network, an integrated voice and data communications system that delivers
end-to-end digital transmissions over a single wireless network to the dashmounted or trunk-mounted radio receiver.
The M-803 is intended to operate in a mobile environment, typically a motor
vehicle. The radio operates over both the Specialized Mobile Radio (SMR)
and National Public Safety Planning Advisory Committee (NPSPAC)
frequency bands. These bands provide more than 840 possible channels spread
over the 806-824 MHz transmit and 851-869 MHz receive bands. The M-803
operates half-duplex with a 15W (typical) transmit output power. Optional
full-duplex operation is also available.
The M803 is available in four hardware configurations, three of which are
further defined for data operation as half- or full-duplex:
•Dash mount with built-in control head. Additional remote control heads
can be added (half- or full-duplex).
•Trunk mount with a single or multiple remote control heads (half- or full-
duplex).
• Data only – No control head (half- or full-duplex, PC required).
• V-TAC Full Duplex Vehicle Repeater with a one or more remote control
heads.
The M-803 uses Time Division Multiple Access (TDMA) technology to allow
multiple users to share a single RF channel. In addition, a single RF channel
can support simultaneous digital voice and data communications. The V-TAC
takes advantage of OpenSky’s TDMA ability to minimize interference
between its local and network radio links when operating in an Extended
Coverage mode (XCOV or XCOV-TG), an undesirable characteristic of many
traditional vehicular repeater systems.
The M-803 provides integrated voice and data services. Voice operation is
provided using a microphone and speaker included in the radio installation kit.
For data transfers, the M-803 is constructed with an industry-standard RS-232
interface serial port for connecting an optional laptop PC.
A PC, not included with the M-803, provides network connectivity through
the standard serial (DTE-type) interface.
The M-803 is a “soft” radio. Its functions are determined by the software
applications installed.
The optional GPS tracking devices embedded in M-803 radios can provide
quick and accurate positional information to a connected laptop locally in the
vehicle. GPS can also provide positional information over the radio link, if
configured to do so.
10
Unlike most dispatch radio systems, however, an active transmission can be
pre-empted by a dispatcher or supervisor. This results in the transmitting radio
instantly switching to receive the “priority” in-bound call. Normal operation
can be resumed once the in-bound call is concluded. This feature is
particularly useful for V-TAC users operating as a scene commander.
2.1 VOICE OPERATION
The voice path operates like a traditional dispatch radio, with a microphone to
transmit (push-to-talk) and a speaker to receive. In OpenSky Trunked Protocol
(OTP), there is no separate voice and data path – all transmitted information is
digital.
2.2 DATA OPERATION
Data operation requires the connection of a laptop PC. OpenSky works
through standard IP protocols such as UDP/IP. The data path operates
similarly to the voice path, with a few differences. All external data
information in and out of the radio uses the RS-232 serial port connection.
2.3 REMOTE CONTROL HEAD OPERATION
For remote mount installations configured with a CH-103 control head, all
normal radio operations and interfaces can be made remotely from the radio
unit via the remote control head connected to the radio unit by a single
twisted-pair connection that is easy to route through a vehicle. Up to six
control units may be attached to a trunk mount radio or V-TAC. Each control
head provides a serial access point for data and any one (only one at a time) of
these can be connected to a data device such as a personal computer.
Where multiple control heads are connected, or where a dash-mount radio is
installed with additional remote control heads, several other features are
available from each position:
•Outgoing voice calls can be initiated. (Any control head can initiate a call
but only one can talk at a time. All other connected control heads will
hear both sides of the conversation.)
•Incoming and outgoing audio can be heard. (Outgoing audio is not
broadcast at the source position.)
• Independent audio control is available.
• Radio settings such as talk group, scan mode etc., can be controlled. (Any
connected control head can override the radio settings of other connected
control heads.)
•Comfort settings, such as volume and display brightness that are
applicable to the individual control head can be adjusted and cannot be
overridden by other control heads.
11
•An optional intercom function is available between control units. (Audio
will be broadcast to ALL connected control heads.)
2.4 INTERCOM OPERATION
The intercom option, a licensed option, allows the M-803 radio to pass audio
locally between control heads and not over the network. It gives users at
multiple control heads connected to the same radio the ability communicate
with each other without transmitting over-the-air. When activated, incoming
network radio calls are still scanned and broadcast at each control head.
2.5 V-TAC OPERATION
V-TAC operation requires the V-TAC hardware configuration (RF Combiner,
Vehicular Repeater Base VRB, and Mobile Radio Unit MRU) and offers the
user four (4) different operating modes: Extended Coverage for individual
users (XCOV), Extended Coverage for talk groups (XCOV-TG), Scene of
Incident (SOI), and normal Mobile-Only operation. Refer to section 3.16 for
operating information on these modes.
2.6 PERSONALITY
As illustrated in Figure 2-1, a personality defines the profiles and talk groups
available to the user. It is the structuring of a collection of profiles and
privileges established by the OpenSky network administrator to provide the
user with a comprehensive set of profiles to communicate effectively with the
necessary talk groups or individuals.
Personalities are stored on the network and downloaded over-the-air to the
radio. This process is called “provisioning.” Provisioning occurs at radio
power-up and at user log-in. Each personality can contain up to sixteen (16)
profiles and each profile can contain up to sixteen talk groups.
2.6.1 Profiles
As stated above, each profile can contain up to sixteen (16) talk groups. A
profile also defines the radio’s emergency behavior. All transmissions are
made on the selected talk group (displayed on the top line of the dwell
display). The user can change the selected talk group to any of the other talk
groups within the profile.
12
Profile 1 Profile 2 Profile 3
TG a
TG b
TG c
TG x
TG y
TG d
TG e
TG f
TG a
TG d
TG g
TG h
TG i
TG z
TG = Talk Group
Figure 2-1: Personality Structure Example
2.6.2 Talk Groups
A talk group represents a set of users that regularly need to communicate with
one another. There can be any number of authorized users assigned to a talk
group. Talk groups are established and organized by the OpenSky network
administrator. An OpenSky talk group is similar to a channel within a
conventional FM radio system.
2.7 GPS OPTION
The radio can be equipped with an optional Global Positioning System (GPS)
receiver. Utilized with a micro-patch antenna, this option allows the user to
track his/her coordinates and report these to central dispatch when within
range of an OpenSky network. See page 52 for additional information.
13
2.8 FRONT PANEL
The front panel provides the interface for the operator. It includes a
19-character (8 over 11) vacuum fluorescent display, navigation and select
buttons for menu navigation, three pre-set buttons, a power button/rotary
volume control knob, a microphone connector, and an emergency button. The
front panel of the dash-mounted M-803 mobile radio is identical to the front
panel of the CH-103 control head utilized in remote/trunk-mounted M-803
and V-TAC radio installations.
In addition, the front panel contains a light-level sensor that samples ambient
light levels for automatic display and button backlight brightness adjustments.
In other words, it automatically brightens the display and backlights when
higher external light levels exist and it automatically dims the display and
backlights during lower external light levels.
14
Figure 2-2: M-803 and CH-103/103PA Front Panel
2.9 M-803 REAR PANEL
The M-803 rear panel is shown in Figure 2-3. It contains most of the radio’s
cable connections. The DC power connector accepts vehicle battery power to
power the radio and an ignition/accessory control sense input. The I/O
connector contains the speaker output connections and optional connections,
including NMEA-formatted GPS output data if the optional GPS receiver is
installed in the radio. A serial port is provided for connection to a standard
serial (DTE-type) device such as a mobile data terminal. An antenna port
connection is also available for connecting a GPS antenna if the optional GPS
receiver is installed in the radio. If not, a nylon plug is inserted into this hole.
Connection to a CAN
through the 3-pin CAN connector.
NOTE
Finally, the TX/RX mini-UHF connector (half-duplex) provides connection
for an RF antenna and the RX port is capped with a nylon plug. For fullduplex radios, the RX port has a TNC connector output and both RF ports and
antenna are connected through an RF combiner.
2
device such as the CH-103 control head, is made
The radio uses a nominal amount of battery power when it
is turned off. If the vehicle in which the radio is installed
is likely to be left unused for extended periods of time,
M/A-COM recommends installing Time-Delay Relay (p/n
MAMROS0088) to prevent excessive vehicle battery
drain.
Figure 2-3: M-803 Rear Panel (Half-Duplex Radio Shown)
2
Controller Area Network—a type of digital interface used to transfer control data and digitized
voice data between the mobile radio and control head(s) connected to it.
15
2.10 CONTROL HEAD REAR PANEL
The rear panel of the CH-103 control head contains the interface connections
necessary between the radio and control unit. As shown in Figure 2-4, five
connection points are:
•POWER - The DC power connector accepts vehicle battery power to
power the unit and an ignition/accessory control sense input for on/off
control via the vehicles ignition switch/key.
• AUDIO – Provides connection to an external speaker.
• SERIAL – An serial port is provided to transfer data to and from a mobile
data terminal or PC. It is configured as a DTE device.
•CAN – The two 3-pin CAN connectors are used to connect the CH-103 (a
CAN device) to the M-803/V-TAC and to other control heads. These two
connectors are connected in parallel to allow daisy chaining of additional
control heads. A terminator (supplied) must be connected to the unused
CAN port of the last control head.
16
Figure 2-4: CH-103 Control Head Rear Panel
2.11 V-TAC REAR PANEL
As shown in Figure 2-5, the V-TAC consists of an RF Combiner and two
radio units, assembled to allow operation from a single antenna. One of the
radio units, the MRU, is configured as a mobile radio. The second radio unit,
the VRB, is configured to operate with a base station frequency plan. Each
unit requires connection to a DC power source. All cable connections are
color coded on the rear panel of the V-TAC components. Refer to Table 2-1
for connection details.
Figure 2-5: V-TAC Rear Panel
Table 2-1: V-TAC Connections
RF COMBINER VEHICULAR REPEATER
BASE (VRB)
From BTX (blue) To TX/RX RF Antenna
From MRX (red) To RX RF Antenna
Antenna
From MTX (green) To TX/RX RF Antenna
From BRX (yellow) To RX RF Antenna
DC Power DC Power DC Power
From I/O Port I/O Port From I/O Port
The front panel of the dash-mounted M-803 mobile radio is identical to the
front panel of the CH-103 control head utilized in remote/trunk-mounted
M-803 and V-TAC radio installations. It includes a 19-character 2-line
display, menu and select buttons for menu navigation, an emergency button,
three pre-set buttons, a power button/rotary volume dial, a microphone
connector. See Figure 3-1. Table 3-1 lists all front panel controls and their
functions.
Figure 3-1: Front Panel Components
The buttons on the front panel are backlit for operation in a low ambient light
level, such as nighttime operation. Some buttons also flash to provide
feedback of various operating conditions.
In addition, the front panel contains a light-level sensor that samples ambient
light levels for automatic display and button backlight brightness adjustments.
In other words, it automatically brightens the display and backlights when
higher external light levels exist and it automatically dims the display and
backlights during lower external light levels.
18
Table 3-1: Front Panel Controls and Functions
PART FUNCTION
POWER
Button/Volume Dial
Mic Connection
EMERGENCY button
AMBIENT LIGHT
sensor
MENU and SELECT
buttons
DISPLAY area
PRE-SET buttons
• Push to turn the radio on
• Push and hold for approximately one-half (0.5) of a
4
to turn the radio off.
second
• Twist clockwise to increase volume.
• Twist counter-clockwise to decrease volume.
• Connect hand-held, hands-free, DTMF microphone,
speaker-mic, or headset here.
• Pressing the EMERGENCY button, if enabled
through programming, will send an emergency alert
and open voice communication on the currently selected talk group or the default emergency talk
group (depending upon how the system is defined).
• To end an emergency call, press and hold the
emergency button for approximately four seconds.
• Radio automatically adjusts the display and button
backlight brightness level based on ambient light.
Do not block this sensor.
• Cycle through the menu loop with UP and
DOWN buttons.
•Scroll through selections with LEFT and RIGHT
buttons.
• Press SELECT button to activate the current
selection. In some cases, this is not necessary as the
last selection will automatically activate after a short
period.
• The SELECT button flashes green when the radio is
receiving and red when the radio is transmitting.
• Menu selections and messages.
• Network Connectivity icon (Figure 3-2)
• Current Volume Level icon (Figure 3-2)
♦ Volume numeric representation within the
display (0 = Muted, 40 = Loudest).
• User may select which one of several dwell displays
the radio uses.
• These buttons are used to store and recall user-
selectable parameters such as scan mode, selected
profile, selected talk group, and priority talk group.
Different parameters can be stored at each of the
three different pre-set buttons.
3
.
3
The Power Button may be configured to function in different ways or be disabled altogether.
Refer to Section 3.3.1 for more detail. At power-up to V-TAC mode (e.g., portable radio not in
vehicular charger at V-TAC turn on), the V-TAC will sound four tones (high-medium-highmedium) as it initiates the default Extended Coverage mode.
4
The length of time necessary to hold the Power Button is configurable. The default time length is
one-half of a second.
19
3.2 DISPLAY OVERVIEW
The display shows the radio status (Table 3-2). Network connectivity and
volume icons appear on the right. The volume level is also represented
numerically within the display with zero (0 or muted) being the lowest volume
level and forty (40) being the highest/loudest level. “Mute” displays when the
speaker is muted. The rest of the display consists of two text lines that change
in response to user interaction with the menu buttons. A sample display is
shown in Figure 3-2.
Icons
Network
Connectivity
Volume Level
Two Text Lines
Figure 3-2: Sample Display (Talk Group Menu Session)
3.2.1 Network Connectivity Icon
The illuminated network connectivity icon (refer to Table 3-2) indicates
network connectivity has been achieved. This icon will always be illuminated
when the powered radio is connected to the “network.”
Transmitting voice communications may be possible even
if the Network Connectivity icon is not illuminated.
NOTE
However, reception of voice calls from others is not
guaranteed while in this state.
3.2.2 Volume Level Icon
As shown in Figure 3-2, the volume level icon indicates the current
speaker/headset volume setting. Turn the volume dial to change the setting.
In addition to the volume level icon at the right of the
display, volume level is also presented numerically within
NOTE
the display. This numeric representation only appears
during, and briefly after, the volume adjustment is made.
20
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