Clear-Com MS-704 - Manual (Page 25)

M S - 7 0 4 / R M - 7 0 4 F O U R - C H A N N E L M A I N / R E M O T E S T A T I O N S
2 - 9
long. The microphone is of the electret type. The microphone has a built-in
¼ in. (0.64 cm) phone jack for a connector. A proprietary mating receptacle is
mounted on the station.
To install a GM-9 or GM-18 panel mount microphone, use the following steps:
1. Check the set screw in the mic mounting flange to make sure it is clear of the
threads in the bushing.
2. Screw the microphone into the bushing hand tight.
3. If desired, set the set screw on top of the bushing to lock the mic in place.
INTERCOM LINE CONNECTORS (REAR PANEL)
The MS-704 has a pair of male XLR-3 connectors for each intercom line. The
male-male pair of connectors are wired in parallel to allow connecting multiple
remote stations.
The RM-704 has a male and female pair of XLR-3 connectors for each intercom
line. The male-female connectors are wired in parallel and intended for
loop-through connection.
The pinout of the intercom connectors is as follows:
Pin 1 --- Ground (shield)
Pin 2 --- Power
Pin 3 --- Audio
PROGRAM INPUT (REAR PANEL)
A XLR-3F connector provides the main program input to the station. This input
is fed to the front panel program level control for listening in the headphones or
speaker. Optionally, it can be fed to each of the intercom lines with the option
DIP switches marked program select A-D. Another option is to feed program
audio to the announce output. This is selected by setting jumper J11 on the main
board to the on position.
Separate program inputs are also available for each channel via the accessory
DB-15 connector. Refer to the section on that connector for details.
The pinout of the program input connector is as follows:
Pin 1 --- Ground (shield)
Pin 2 --- - Signal
Pin 3 --- + Signal