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The Telex MRT-327 2-Channel User Station is a base station used for RTS TW intercom systems. The station provides flexible routing, microphone input, call signaling, a built in limiter and more. It may be used as a headset or a speaker station with the optional MCS325 modular speaker.
An optional rackmount kit may be purchased for installation into a 19-inch rack. Its dual-action on/off switch allows for momentary and latching push-to-talk functions. The MRT-327 can receive 24kHz "talk off" signals for deactivation of the MRT-327's microphone from a remote location. Additional features include a built-in microphone limiter and optional speaker operation.
Input DC voltage: TW mode: 18 to 35 volts DCLocal power: 15 to 35 volts DC (12 to 15 volts, DC reduced performance)DC current drawn from TW line: Quiescent: 45 mA +/- 10%Operating, 25 ohm phones: 75mA +/- 10% Operating, 25 ohm phones + call light: 90mA +/- 10%Operating, 8 ohm speaker: 240mA +/- 10% Operating, 8 ohm ohm speaker + call light: 300mA +/- 10%Operating current is measured with output level at 10dB below clipping. Local power option draws no current from TW line.
10k ohms minimum (designed for use with 200-ohm "TW" intercom lines)
Temperature: Operating: 32° to 140°F (0° to 60°C)Storage: -40° to 185°F (-40° to 85°C) Humidity: Operating and storage: 5% to 95%, non-condensing
Maximum Voltage Gain: 30dB Frequency Response: 100Hz to 8kHz +/- 4dBOutput Power: 1.5 Watts into 8 ohms nominal Speaker DIM (speaker muting during mic activation) adjustable, -4 to -30dB (factory set to -6dB)
Voltage Gain: 34dB Output Voltage: 8 volts peak-to-peak in to 25 ohms nominalOutput power: 1/2 Watt peak into 25 ohms Frequency Response: 150Hz to 10kHz +/- 3dBHeadphone Impedance Range: 25 to 600 ohms (600 to 2000 ohms with reduced levels) Sidetone Adjustment Range: -20dB to full on