Motorola APX Mobile Gebrauchsanweisung - Seite 41
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APX Dual-Radio Installation: Operator Compartment Units
5.6
Operator Compartment Units
This section describes operator compartment unit installations.
5.6.1
Quick-Disconnect Connector
NOTE: The O7 Control Head quick-disconnect connector typically mounts under the driver's seat.
This allows the operator to disconnect it quickly and easily if so desired. Be sure adequate
clearance exists between the connector and the seat for all positions of seat adjustment.
Mount the O7 Control Head connector bracket using the #10-16 x 3/4' self tapping screws supplied
in the Hardware kit (P/N HLN4831_). Be sure it is easily accessible. Allow for the forward and
backward movement of the seat. Use the #4-40 screws, nuts and lock washers to hold the O7
Control Head connector to the bracket.
5.6.2
Speaker Mounting
Connect both speakers to the gray, two-pin connectors at the quick-disconnect end of the APX Dual-
Radio Cable (P/N HKN6250_) cable. Note the speaker wires are black/red and black/violet for the
Primary radio and are green and orange for the Secondary Radio. Be sure the plugs are fully seated,
and then tie up any surplus cable.
Two speakers are required to play the audio from each radio separately. There are two ways to
connect speaker to radio:
a. Speakers connect to radio directly.
b. One speaker connects to Secondary radio, and the other speaker connects to O7 Control
Head. The speaker connected to O7 Control Head, shall only play the audio from Primary
Radio.
Refer to Section 2.5, Speaker, of the APX Mobiles And Control Heads Installation Manual (P/N
6878215A01), for further details on speaker mounting.
5.6.3
Microphone Hang-Up Clip
Refer to Section 2.6, Microphone Hang-Up Clip, of the APX Mobiles And Control Heads Installation
Manual (P/N 6878215A01), for further details on Microphone Hang-Up Clip.
5.6.4
Emergency Footswitch
Emergency Footswitch must be connected to the control head, or wired to both radios. Refer to
Chapter 4, Options and Accessories Installation, of the APX Mobiles And Control Heads Installation
Manual (P/N 6878215A01). When installing the footswitch, discard the green and black extension
wires packaged in the footswitch kit and use instead the wiring packaged with the APX Dual-Radio
Cable (P/N HKN6250_).
5.7
Antenna Mounting
The three most important factors in antenna placement are maximizing the distance between the
four antennas, maximizing the distance between the radios and the antennas (particularly between
the VHF antenna and the radios), and using good ground planes for the antennas.
Mount the VHF antenna on the middle of the roof of the vehicle and the UHF antenna on the middle
of the trunk. The further away from the edge and towards the middle of the roof or trunk that you can
go, the better the ground plane for the respective antenna. This mounting configuration separates
each antenna and puts the VHF antenna far away from the radios. The next best placement for the
antennas is to locate them both on top of the roof. Mount the UHF antenna near the rear of the
vehicle, about 6 inches from the edge of the roof.
MN000770A01-AA
5-7
July 30, 2014