M S - 7 0 2 T W O - C H A N N E L M A I N S T A T I O N
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12. Mic Select Switch:
Set the
mic select
switch to select whether the panel
microphone or the headset microphone is active.
13. Panel Mic Gain:
This control is located on the inside of the MS-702 chassis.
It may be used to increase or decrease the volume of the panel microphone.
It has no effect on the sensitivity of the headset microphone.
To adjust the panel microphone gain, remove the top cover of the MS-702.
Locate the R161 control which is on the leftmost side of the circuit board,
toward the front of the MS-702 when facing it. Use a small screwdriver to
turn the control clockwise to increase sensitivity or counterclockwise to
decrease sensitivity.
Note:
This adjustment should only be carried out by qualified service
personnel.
Figure 1-2: Gain Adjust Control R161
14. Announce:
Press the
announce
button to make stage or PA system
announcements. It directs the audio from the selected headset or panel
microphone to the
annc out
rear panel connector and activates the announce
relay. Simultaneously, if the program audio feed to the announce output is
enabled, it is interrupted by the announcement. Program audio feed to the
announce output is selected by setting jumper JP2 on the main board to the
on
position. Optionally, pressing the announce button can also disconnect
the selected headset or panel microphone audio from the intercom line(s).
This option is controlled by the
interrupt announce option
switch.
Note:
This adjustment should only be carried out by qualified service
personnel.
18.
Panel Mic Connector:
Clear-Com recommends the GM-9 and GM-18
plug-in panel microphones for use with the MS-702. The GM-9 is 9 in.
(22.86 cm) long and the GM-18 is 18 in. (45.72 cm) long. The microphone
is an electret type. The 1/4 in. (0.64 cm) phone jack on the microphone
mates with the
panel mic
receptacle on the front panel of the MS-702.
To install a GM-9 or GM-18 microphone, use the following steps:
R161
Gain Control
