8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
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PART I
January 2019
Page 39 of 153
Mounting the Mobile Radio
For detailed Mobile Radio and accessories Installation Instructions, please refer to the
Installation Manuals available from Motorola. Ensure the Remote Mount MSU is mounted
beside the DVR within the range of the DVRS cabling.
NOTE:
Unless special cabling length is specified upon placing an order, the DVR is shipped with
a standard 3ft-long interconnect cable between the MSU and DVR.
Connecting the DVRS Cables
NOTE:
The DVRS antenna ports (both DVR and APX sides) are mini UHF female and require
antennas with matching mini UHF male terminations. Simplex Cross-Band Models
(without any filters) require an antenna with TNC male connector.
Figure 15 DVR Connectors - Front and Back View (With Duplexer)
Power Cable
IMPORTANT!
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.
1. Determine power cable routing between the VRS mounting location and the vehicle
battery.
2. Locate an existing hole with a grommet in the vehicle firewall. If a firewall hole does
not exist, drill an access hole in the firewall for cable passage. Install a grommet in the
hole to avoid damage to the power cable.
3. From the inside of the vehicle, feed the red lead (without lug attached) through the
access hole into the engine compartment.
4. Find a grounding point close to the VRS location. Shorten the black lead.
5. Strip the end of the black lead as required. Crimp the large lug on the black lead and
connect it to the vehicle chassis ground.
TX
RX
RADIO
DVR
USB
AUX
POWER
ANTENNA
RX
TX
