MM-010019-001, Rev. B
48
11 MICROPHONE
ATTACHMENT
There are several versions of microphones available for use with the radio. Each has a 17-pin flush-mount
type connector that mates with the mic connector on the front panel of the control head. The mic’s
connector includes a captive thumbscrew that secures it to the mic connector on the front panel of the
control head. A microphone clip is included with each microphone. The radio can be configured to
provide a monitor function when the microphone is cradled in the clip. Connect the mic to the control
head and install the clip as follows:
1.
As illustrated in Figure 11-1, grasp the mic’s connector with a thumb and index finger on the sides of
the connector just adjacent to the thumbscrew.
2.
Position the connector in front of the control head’s mic connector so the mic cable’s stain relief is
hanging down and out at an approximate 45 degree angle.
3.
Mate the two connectors by pressing them fully together. Do
not
apply any force to the thumbscrew
when mating the connectors.
4.
Tighten the thumbscrew finger-tight. Do
not
use a screwdriver to
tighten
it.
5.
Using the microphone clip as a template, drill mounting holes in the surface of the selected location.
6.
Attach the microphone clip to the mounting surface using self-threading screws. Select a location that
has clearance for the mic when it is clipped to the clip.
7.
The microphone clip must be grounded to the vehicle’s chassis. If not mounted to a grounded metal
surface, complete this requirement by adding a jumper wire attached from chassis ground to the clip.
8.
Clip the microphone to the clip.
Figure 11-1: Attaching the Microphone to the CH-721Control Head
As illustrated, do
not
apply any
force to the thumbscrew when
mating the mic connectors.
