8M083X25 R14
APX Series P25 Interface
DVRS Installation & Programming Guide
–
PART I
January 2019
Page 50 of 153
DVRS Antenna Installation
Any DVRS model requires the use of two or three antennas
– one or two connected to the
MSU and one connected to the DVR. For a list of approved DVR antennas, please refer
to
Appendix 12.
IMPORTANT!
To assure optimum performance and compliance with RF Energy Safety standards,
these antenna installation guidelines are limited to metal-body vehicles with
appropriate ground planes and take into account the potential exposure of back
seat passengers and bystanders outside the vehicle.
The MSU and DVR antennas must be installed in such way as not to cause interference.
IMPORTANT!
All DVRS models require 30dB minimum Antenna Isolation between the DVR and
MSU Antennas.
Before installing an antenna on the trunk lid:
•
Ensure the distance from the antenna to the front surface of the rear back seat is
greater than the minimum distance specified in the
“Product and RF Safety” booklet
for the specific DVRS model and frequency band.
•
Ensure the trunk lid is grounded by connecting grounding straps between the trunk lid
and the vehicle chassis.
To ensure compliance with RF Energy Safety standards, the antenna locations, gain and
maximum transmit power (for both the MSU and the DVR) must be as specified in the
“Product and RF Safety” Booklet shipped with the DVR.
NOTE:
The DVRS antenna ports are mini UHF female and require antennas with matching mini
UHF male terminations. Simplex ONLY DVRS configurations feature TNC female
connector on the DVR side.
