8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
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PART I
January 2019
Page 35 of 153
DVRS Installation Basics
Planning the Installation
Before starting the installation, inspect the vehicle and determine how and where you
intend to mount the DVRS antennas (one or two connected to the Mobile Radio and one
to the DVR), the DVR components, MSU, Control Head, MSU accessories. Ensure to
provide adequate separation between the Mobile radio antennas and the DVR antenna,
especially in in-band configurations.
When planning the DVRS installation, make sure to leave adequate room around all DVRS
modules to allow for easy RF and Control cabling connections, to enable programming /
re-flashing access to both the DVR and MSU ports and access to the DVR mounting
screws.
Ensure all DVRS components are mounted within the interconnecting cables range.
The DVRS operates only in negative ground, +12VDC electrical systems. Before starting
the installation, make sure that the ground polarity of the vehicle is correct. Accidentally
reversing the polarity will not damage the radio but will cause the cable fuses to blow.
Futurecom recommends installation of voltage surge protection to protect the car
electronics to prevent spikes in the supply voltage.
CAUTION!
Before
installing any electrical equipment, check the vehicle manufacturer’s User
Manual.
Installation Tools Required
Description
Needed for:
Drill
Mounting base installation screws.
Center Punch
Mounting base installation screws.
6mm Allen Key
Tightening the 8mm machine screws for securing DVR/Filters
to their mounting bases.
Wire Cutters and
Crimping Tool
DC power cable installation.
#1 Philips Screwdriver Tightening of cover screws.
3/16” Flat Screwdriver Tightening of connector screws.
