Clear-Com RM-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
• EXTERNAL IFB and HOT MIC OUTPUT: A rear panel jack provides
direct connection to Clear-Com’s external IFB system such that the
station’s microphone can be used in the external IFB system. A buffered
unswitched output of the selected microphone is also available.
• 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