RTS Stereo Receiver MCE 325 User Guide

MCE-325  
User Station  
The MCE-325 is a four-channel, programmable intercom station. It may be used as a headset station or, with the addition of  
the MCS-325 Modular Speaker, as a speaker station. It may be mounted in a console or equipment rack via optional mounting  
kits. The MCE-325 can be used with either two-wire or four-wire intercom lines, or a combination of both. In the labeling on the  
MCE-325, references to channels 1, 2, 3, and 4 indicate two-wire lines; references to four-wire A and four-wire B indicate four-  
wire lines. The MCE-325 can be interfaced to a variety of external devices including external program sources, two-way radios,  
paging systems, and satellite circuits.  
Features  
Call Signaling  
External device keying  
Call signaling is accomplished using an inaudible (20 kHz)  
signal to activate a call indicator LED.  
External devices, such as two-way radios, speaker mute  
relays, or paging systems may be activated through key  
outputs at the auxiliary connector on the rear panel. The key  
outputs may also be used to expand the simple IFB function,  
allowing any one of a number of MCE-325 stations to inter-  
rupt the program source and talk on the line.  
Remote “talk-off”  
Active, unattended remote station microphones may be  
deactivated by momentarily injecting an inaudible (24 kHz)  
signal into the corresponding intercom line. The MCE-325  
can send and receive “talk-off” signals.  
Microphone Limiter  
The microphone preamplifier circuit contains a limiter, which  
helps to equalize voice levels.  
VOX circuit  
The MCE-325 may be programmed for voice activation of  
the microphone.  
Fully programmable  
Retains programming even when power is shut off.  
Simple IFB  
Program audio assigned to a channel is interrupted during  
talk.  
Instantaneous Auto-Reset  
Instantaneous Auto Reset (IAR), the newest technology in  
performance and safety, which uses a revolutionary new  
circuitry that dynamically monitors line fault conditions. Then,  
when the fault is removed, automatically brings individual  
power supply channels up.  
Line Drawing  
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