Futurecom Systems Group ULC DVRSUHF MOBEXCOM DVR Vehicular Repeater User Manual Revised
Futurecom Systems Group ULC. MOBEXCOM DVR Vehicular Repeater Revised
Contents
- 1. users manual
 - 2. USERS MANUAL
 - 3. User Manual
 - 4. installation/operating instructions- RF Exposure Booklet
 - 5. RF Exposure Booklet
 - 6. Revised RF Expo Booklet
 - 7. Revised User Manual
 - 8. Updated User Manual
 - 9. RF Safety Booklet
 - 10. User Manual Revised
 - 11. RF Safety Booklet Revised
 - 12. Trimmable Antenna
 - 13. Installation Manual
 
Revised User Manual

MOBEXCOM DVRS Vehicular Repeater 
Users Manual 
8A083X01 Rev. 2.2 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 2 
1. TABLE OF CONTENTS 
Section Page 
1. TABLE OF CONTENTS.......................................................................................... 2 
Notes, Attentions, Important........................................................................................ 3 
REPEATER MODES........................................................................................................................ 6 
CONTROL HEAD............................................................................................................................. 7 
REPEATER RADIO UNIT................................................................................................................ 8 
MOBILE RADIO UNIT...................................................................................................................... 8 
3. OPERATION........................................................................................................... 9 
CONTROL HEAD............................................................................................................................. 9 
APPENDIX 1................................................................................................................. 12 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 3 
Notes, Attentions, Important 
Throughout this manual, you will see Notes, and Attentions, Important 
Their meaning is as follows: 
 NOTE 
A clarifying statement that expands on the text that follows. 
 IMPORTANT 
An important statement that should be considered and / or implemented in order to 
achieve adequate equipment operation. 
 ATTENTION! 
An instruction that must be followed in insure compliance with the appropriate 
standards or proper equipment operations. 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 4 
 NOTE 
This equipment has been tested and found to comply with the limits for a Class A digital device, 
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful 
interference when the equipment is operated in a commercial environment. This equipment generates, uses, and 
can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may 
cause harmful interference to radio communications. However, there is no guarantee that interference will not 
occur in a particular installation. 
 ATTENTION! 
Changes or modifications not expressly approved by Futurecom Systems Group Inc. could void the 
user’s authority to operate the equipment. 
USA Users: 
Do not use the DVRS in the frequency band 406.0MHz – 406.1MHz. This frequency band is reserved for 
distress beacons 
RF EXPOSURE 
    ATTENTION! 
To satisfy FCC/IC RF exposure requirements for mobile transmitting devices, refer to Futurecom 
8F083X03 or 8F083X05 Product Safety and RF Energy Exposure Booklet for TX – RX duty cycle 
and a separation distance between the antenna of this device and persons during operation. To ensure 
compliance, operations at closer than this distance is not allowed.  
 RADIO OPERATOR 
Futurecom requires the MOBEXCOM DVRS Repeater operator to ensure FCC Requirements for Radio 
Frequency Exposure are met. The minimum distance between all possible personnel and an 
omnidirectional antenna must be as specified in Futurecom 8F083X03 or 8F083X05 Product Safety and 
RF Energy Exposure Booklet.  
FAILURE TO OBSERVE THE MPE DISTANCE EXCLUSION AREA AROUND THE ANTENNA MAY 
EXPOSE PERSONS WITHIN THIS AREA TO RF ENERGY ABOVE THE FCC EXPOSURE LIMIT FOR 
BYSTANDERS (GENERAL POPULATION). IT IS THE RESPONSIBILITY OF THE REPEATER OPERATOR 
TO ENSURE THAT MPE LIMITS ARE OBSERVED AT ALL TIMES DURING REPEATER 
TRANSMISSIONS. THE REPEATER OPERATOR MUST ENSURE AT ALL TIMES THAT NO PERSON 
COMES WITHIN MPE DISTANCE FROM THE ANTENNA. 
 ATTENTION! 
The MOBEXCOM DVRS Repeater is intended for use in occupational / controlled conditions, where 
users have full knowledge of their exposure and can exercise control over their exposure to meet FCC 
limits. This radio is NOT authorized for general population, consumer, or any other use. 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 5 
ANTENNA INSTALLATION 
 IMPORTANT 
Refer to Futurecom 8F083X03 or 8F083X05 Product Safety and RF Energy Exposure Booklet for 
antenna installation instructions. 
FCC Label 
including interference that may cause undesired 
2) This device must accept any interference received,
1) This device may not cause harmful interference, and
Operation is subject to the following two conditions:
This device complies with Part 15 of the FCC Rules.
operation.  
RF Exposure Label 
RF EXPOSURE LABEL INSTALLATION LOCATION 
 IMPORTANT 
The RF Exposure Label should be affixed in the vehicle beside the mobile radio control head. The label 
should be in the direct view of the Repeater operator.  The label is supplied with the MOBEXCOM DVRS 
Repeater. 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 6 
2. INTRODUCTION 
The Futurecom MOBEXCOM DVRS® Vehicular Repeater is designed to interface to a range of mobile radios 
and control heads. It permits expanded operation of portable radios. The Vehicular Repeater system consists of. 
a  mobile radio, MOBEXCOM DVRS® Vehicular Repeater unit, a mobile radio Control Head and a RF 
multiplexer. The Control Head communicates with the Vehicular Repeater and the mobile using a serial data 
protocol.  
REPEATER MODES 
The Vehicular Repeater operates in one of three modes. The mode of operation is selectable from the Mobile 
Control Head by the mobile radio operator.  
The three modes are known as the MOBILE, LOCAL and SYSTEM modes. The function and purpose of each 
mode is described as follows. 
Mobile Mode 
In the MOBILE mode, the vehicular repeater is completely disabled. The mobile radio is operational and 
will permit the mobile radio user to communicate conventionally, using the mobile radio. The mobile user may 
select the desired mobile operating channel, adjust the receiver volume level and transmit using the 
microphone Push-to-Talk (PTT).  
This mode is used when Repeater operation is not desired. The Vehicular Repeater System operates 
similarly to a standard mobile radio system, as if the Repeater were not present. The RF multiplexer is 
disabled and the antenna is connected directly to the mobile radio. 
The MOBILE mode should be selected if several Repeater equipped vehicles are in the same area and 
another Vehicular Repeater already has LOCAL or SYSTEM mode enabled. 
Local Repeat Mode 
In the LOCAL repeat mode, the Vehicular Repeater is enabled to permit communications among nearby 
portable radio users and the mobile radio user. Repeater signals are not retransmitted by the Mobile Radio, 
so that communications on the mobile channel will not be disturbed. However, all functions of the mobile 
radio operate normally, except for scan, microphone mobile Push-to-Talk, scan activation, mode selection, 
zone selection, home channel operation and mobile channel selection. When the LOCAL repeat mode is 
selected, the mobile radio scan is deactivated and the mobile radio reverts to the selected mobile channel.  
Signals received by the Vehicular Repeater receiver are heard in the mobile speaker and will also be 
retransmitted by the Vehicular Repeater transmitter. Signals received by the Mobile receiver are heard in the 
Mobile speaker and will be transmitted by the Vehicular Repeater. When signals are present in both the 
Vehicular Repeater and Mobile receivers simultaneously, the signal from the Vehicular Repeater will have 
priority in the mobile speaker.  (Note that the receiver/PTT and speaker priorities are programmable.) 
The mobile user will key only the Vehicular Repeater transmitter when using the microphone Push-to-
Talk. The Vehicular Repeater receiver has full priority over the mobile radio operator microphone Push-to-
Talk. To respond to a mobile signal, the mobile operator must enter either the MOBILE or SYSTEM mode to 
be able to transmit from the mobile radio.  
The mobile user may adjust the receiver volume level and transmit over the Vehicular Repeater using the 
microphone Push-to-Talk.  
The LOCAL mode, as the name implies, permits communications among portable radio users and the 
mobile radio operator, without interfering with the mobile radio dispatch channels.  
System Repeat Mode 
In the SYSTEM repeat mode, both the Mobile Radio and the Vehicular Repeater are enabled to permit 
the full exchange of communications among nearby portable radio users, the mobile radio user and the 
dispatcher and other users on the Mobile Radio channel. Signals received by the Vehicular Repeater receiver 
are heard in the mobile speaker and will also be retransmitted by both the Vehicular Repeater and Mobile 
transmitters. Signals received by the Mobile receiver are heard in the mobile radio speaker and are also 
retransmitted out of the Vehicular Repeater transmitter. However, all functions of the mobile radio operate 
normally, except for scan, scan activation, mode selection, zone selection, home channel operation and 
mobile channel selection. When the SYSTEM repeat mode is selected, the mobile radio scan is deactivated 
and the mobile radio reverts to the selected mobile channel. When signals are present in both the Vehicular 
Repeater and Mobile receivers simultaneously, the signal from the Vehicular Repeater will have priority in the 
mobile speaker. (Note that the receiver/PTT and speaker priorities are programmable.) 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 7 
The mobile user simultaneously keys both the Mobile radio and Vehicular Repeater transmitters when 
using the microphone Push-to-Talk. The Vehicular Repeater receiver has full priority over the mobile radio 
operator microphone Push-to-Talk. The mobile radio operator microphone Push-to-Talk has priority over the 
Mobile receiver. 
When signals are present in both the Vehicular Repeater and Mobile receivers simultaneously, the signal 
from the Vehicular Repeater has priority in the mobile speaker. 
The mobile user may adjust the receiver volume level and transmit over the Vehicular Repeater and 
Mobile Radio, using the microphone Push-to-Talk.  
The SYSTEM repeat mode is used when full communications among all radio parties is desired. 
CONTROL HEAD 
The control unit is a standard mobile radio control head. The Vehicular Repeater is designed to operate with a 
variety of control heads. It is a ruggedly constructed weatherized control unit, incorporating an array of 
pushbuttons, a Liquid Crystal display, 2 knobs and 2 LED indicators. The display and pushbuttons are backlit for 
night time visibility.  
The control unit is housed in a two-piece plastic, weather-resistant housing. The external radio/repeater 
connections are made to connector on the rear of the unit. A microphone is provided and is secured to the control 
unit connector on the front of the control unit.  
A serial-control data interface is used to provide a communications connection between the control unit, the 
Vehicular Repeater and the mobile radio.  
The following features are provided: 
Knobs for: 
‘Volume’ with integral Power On/Off pushbutton switch 
‘Channel’ selection 
Pushbuttons for: 
‘Zone’ 
‘Page’ 
‘Monitor’ ON/OFF 
‘Alarm’ (Δ) 
‘Private’ (∅) 
‘Repeater mode’ selection (H/L) 
‘Phon’ 
‘Scan’ 
‘Call’ 
‘Opt’ 
‘Home Menu’ 
‘Sel’ 
LED Indicators for: 
‘Mobile Transmit’ (Red LED) 
‘Mobile Receiver Busy’ (Orange LED) 
Display: 
Alphanumeric LCD (with backlighting) 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 8 
Indicators are provided to display the receiver and transmitter status of the mobile. The ‘Mobile Transmit’ 
red indicator lights whenever the mobile transmitter is keyed. The ‘Mobile Receiver Busy’ orange indicator lights 
whenever the receiver is busy, regardless of presence or absence of any CTCSS (Channel-Guard) tone coding.  
REPEATER RADIO UNIT 
The Repeater is designed to implement a Vehicular Repeater System, to provide portable radio users greater 
communication range by repeating signals through the vehicle's mobile radio to the dispatch centre. Various 
modes of repeater operation are available, to suit different operational requirements. The Vehicular Repeater 
Radio is the central connection point for the vehicular system. It connects to an external Control Head and Mobile 
Radio.  
It includes all the necessary hardware for repeater operations. The Repeater is housed in a weather resistant 
metal enclosure with 2 removable covers. The covers provide protection for the connectors. The Repeater is 
mounted on a RF multiplexer. 
The Repeater communicates with the control head and the mobile radio via serial communication bus.   
MOBILE RADIO UNIT 
The Mobile Radio used in the Vehicular Repeater System is a standard mobile radio. Refer to the mobile 
radio’s user manual for details of operation of this radio. The Vehicular Repeater is designed to operate with a 
variety of mobile radio units. 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. Preliminary Page 9 
3. OPERATION 
CONTROL HEAD 
The Repeater Control Head selects mode of operation for both the Repeater and the Mobile Radio. 
To Turn the Repeater ON or OFF 
Press the button in the Volume knob located on the left side of the control unit. The display should 
become active when the system turns ON. A test message appears briefly on the display. When the system 
is turned ON, the Mobile Channel and Repeater Mode will automatically return to the same settings that were 
in effect when the power was last turned OFF. Press the button in the Volume knob second time to turn the 
Repeater OFF. 
To Change the Speaker Volume 
Turn the Volume knob until the desired volume level is reached.  
To Change the Repeater Mode 
Press the 'H/L' button once. The Repeater mode is changed in the following sequence: MOBILE-
SYSTEM-LOCAL-… In the Mobile mode the alphanumeric display shows ‘ZONE CHANNEL’. In the System 
mode the display changes to ‘RSYS CHANNEL’ and in the Local mode it shows ‘RLOC CHANNEL’. (‘ZONE’ 
is the selected Mobile zone name while ‘CHANNEL’ is the selected Mobile channel name.) When the LOCAL 
or SYSTEM repeat modes are selected, the mobile radio scan is deactivated and the mobile radio reverts to 
the selected mobile channel.  
NOTE 
The Mobile zone and channel cannot be changed while in LOCAL and SYSTEM 
repeat modes. 
Refer to the earlier description of repeat modes.  
MOBILE XMIT Status Indicator 
The 'MOBILE XMIT' red LED indicator is one of two status indicators that is provided on the Control 
Head, located in the upper left corner. This indicator will light whenever the Mobile Transmitter is keyed. This 
will occur in 'MOBILE' or 'SYSTEM' mode when the microphone Push-to-Talk is being pressed or when a 
signal from the Vehicular Repeater is being retransmitted by the Mobile Radio (In 'SYSTEM' mode). 
MOBILE BUSY Status Indicator 
The 'MOBILE BUSY' orange LED indicator is one of two status indicators that are provided on the Control 
Head, located in the upper left corner. This indicator will light whenever the Mobile Radio is receiving any 
signal on the selected Mobile Channel. If CTCSS (Channel Guard) tone coding is used, the signal may not be 
audible if the coding does not match. 
Note that if the microphone is “off-hook”, the Mobile/Repeater audio will be heard on the speaker even if 
CTCSS is not present or is incorrect. This is the same as the Monitor function. 
ALPHANUMERIC Status Indication 
The ‘ZONE’ is not displayed in the LOCAL and SYSTEM repeat modes. Instead, this portion of the 
alphanumeric display shows the status of the Repeater in these two modes together with 'MOBILE XMIT' and 
'MOBILE BUSY' status indicators. 
The following tables summarize indicators for different Repeater states: 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. PreliminaryPage 10 
CONTROL HEAD INDICATORS AND ALPHANUMERIC DISPLAY – MOBILE MODE 
REPEATER  STATE 
 ‘MOBILE BUSY’   ‘MOBILE XMIT’  DISPLAY 
MOBILE RECEIVE WITH 
CTCSS  ON 
  ‘ZONE CHANNEL’ 
MOBILE RECEIVE 
WITHOUT CTCSS  ON 
  ‘ZONE CHANNEL’ 
MICROPHONE PTT   ON 
 ‘ZONE CHANNEL’ 
REPEATER RECEIVE 
WITH CTCSS    ‘ZONE CHANNEL’ 
REPEATER RECEIVE 
WITHOUT CTCSS    ‘ZONE CHANNEL’ 
CONTROL HEAD INDICATORS AND ALPHANUMERIC DISPLAY – LOCAL MODE 
REPEATER  STATE 
 ‘MOBILE BUSY’   ‘MOBILE XMIT’  DISPLAY 
MOBILE RECEIVE WITH 
CTCSS  ON    ‘RL TX CHANNEL’ 
MOBILE RECEIVE 
WITHOUT CTCSS  ON     ‘RLOC CHANNEL’ 
MICROPHONE PTT      ‘RL TX CHANNEL’ 
REPEATER RECEIVE 
WITH CTCSS      ‘RL RT CHANNEL’ 
REPEATER RECEIVE 
WITHOUT CTCSS      ‘RL RX CHANNEL’ 
CONTROL HEAD INDICATORS AND ALPHANUMERIC DISPLAY – SYSTEM MODE 
REPEATER  STATE 
 ‘MOBILE BUSY’   ‘MOBILE XMIT’  DISPLAY 
MOBILE RECEIVE WITH 
CTCSS  ON    ‘RS TX CHANNEL’ 
MOBILE RECEIVE 
WITHOUT CTCSS  ON  ‘RSYS CHANNEL’ 
MICROPHONE PTT    ON  ‘RS TX CHANNEL’ 
REPEATER RECEIVE 
WITH CTCSS    ON  ‘RS RT CHANNEL’ 
REPEATER RECEIVE 
WITHOUT CTCSS      ‘RS RX CHANNEL’ 
Note that ‘ZONE’ and ‘CHANNEL’ are the selected Mobile zone and channel names, respectively. 

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. PreliminaryPage 11 
Functions Disabled in LOCAL and SYSTEM Repeat Modes 
There are several control unit button and knob functions, which are disabled in the LOCAL and SYSTEM 
repeat modes.  These are Scan activation, Mode selection, Zone selection, Home channel operation and 
Mobile channel selection.  
NOTE 
A standard audible error signal “bop” as well as an error message is displayed     
‘RLOC VR ACTIVE’ or ‘RSYS VR ACTIVE’ if any of the above functions are 
attempted in the LOCAL or SYSTEM repeat modes. 
Other Button and Knob Functions 
The available Repeater functions are: 
•  ‘Monitor’  - unmutes speaker audio when Mobile or Repeater RF carrier is present. 
•  ‘H/C’    - changes Repeat mode of operation. 
•  ‘Call’    - sends call signal via Mobile transmission (SYSTEM and MOBILE mode only). 
•  ‘Opt’    - dims alphanumeric display. 
All other buttons and knobs function as programmed in the standard mobile radio. Please refer to the 
mobile radio’s documentation for details of operation.  

DVRS Vehicular Repeater System 
Futurecom Systems Group Inc.DVRS Users Manual 8A083X01_UHF_Rev2_2.DOC Rev. PreliminaryPage 12 
APPENDIX 1 
General Specifications   
Dimensions Height / Width / Depth 92mm (3.63”) / 186mm (7.32”) / 315mm ( 12.41”) 
Weight 5.2 kg (11.5 lbs) approx. 
Channel Spacing 12.5 kHz or 25 kHz 
Analog Voice or P25 Modulation 
Power Supply 13.8 VDC ± 20%, negative ground only 
DC Current Drain        Repeater OFF
RPTR Standby
Receive
Transmit
Max. 0.01 A 
Max. 0.8 A 
Max 1.7 A @ 7.5 W Audio @ 13.8 VDC 
Max. 6.0 A @ 20 W RF output at TX Connector 
Operating Temperature -30°C to +60°C 
Protection Against Liquids IP6 (water jet proof) 
RF Connector Impedance 50 Ohms 
Duty Cycle 50% TX – 50% RX  
External Connectors
RF Connectors
Computer Interface
Mobile Radio
DC Power
TNC female 
USB, 9 pin male circular 
20 pin male circular 
6 pin male circular 
Power Output at TX Connector 20 W Max. (programmable per channel from 1 W 
Min.) 
CCT Option 15 sec to 15 min. or disabled 
Carrier Frequency Stability
12.5kHz Channel Spacing
25kHz Channel Spacing
± 1.5 ppm, from –30° to +60°C, ambient +25°C 
reference 
± 2.5 ppm, from –30° to +60°C, ambient +25°C 
reference 
Audio Distortion <3% 
Frequency Band (TX and RX) 380 - 430 MHz 
450 - 470 MHz 
470 - 512 MHz 
Applicable Standards  Test 
MIL-STD 810C,D,E,F For rain, dust and salt atmospheres 
MIL-STD 810C,D,E,F For shock and vibration