Clear-Com MS-704 - Manual (Page 10)

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 1 - 4
• SPEAKER ON/OFF SWITCH: The speaker may be turned on and off with
a front panel switch.
• SPEAKER DIMMING: Whenever a talk is active, the speaker output is
dimmed approximately 6 dB to prevent feedback.
• PANEL MIC GAIN: The preamplifier for the panel microphone has a gain
trim adjustment to allow field trimming. Adjustment of the panel
microphone gain also varies the frequency response of the preamplifier to
compensate for feedback when the microphone is used up close.
• POWER SUPPLY WITH SHORT CIRCUIT PROTECTION: The
MS-704 features redundant powering to remote stations by providing
separate short-circuit-protected power sources to each of the four intercom
lines. A short on one intercom line will not bring the whole system down.
Short circuit indicators are provided on the front panel for each channel.
• HEADSET AUDIO LIMITER: The headset audio limiter restricts the
maximum audio level heard in the headset to protect the hearing of the user.
You can turn this feature on or off with one of the front-panel dip switches.
OPERATION
Once installed and operational, the MS-704 and RM-704 intercom stations are
easy to operate. The following sections describe normal operation of the units,
use of controls available under the access panel, and abnormal operation of the
power distribution system.
Some of the following functions are exclusive to the MS-704 and are marked as
such.
NORMAL OPERATION
Normal operation of the MS-704 and RM-704 requires access only to the front
panel controls. The following is a brief description of how to use the front panel
controls in day-to-day operation.
There are option DIP switches and adjustment controls behind the access panel
in the lower portion of the front panel. To gain access to the switches and
controls, pull on the two latches on either end of the access panel and remove it.
This section discusses the following subjects:
• Intercom power status lights
• Selecting microphones and enabling the speaker
• Listening to intercom channels
• Monitoring main program
• Talking on intercom channels
• The all-talk function
• Sending and receiving call signals
• Linking intercom channels together (MS-704)