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Intercom

RTS MRT-327

RTS / MRT-327
BCS Price: $460.00
Item #:MO17948
Condition:Reference Item
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Model Description:
2 Channel select user station / optional MCP6 Mic., MCS-325 Modular Speaker (not available)

Available Items

Intercom
RTS / MRT-327

NEWRTS MRT-327

SKU# EQ438586N

2 Channel select user station / optional MCP6 Mic., MCS-325 Modular Speaker (not available)

Price:$460.00

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Intercom
RTS / MRT-327

NEWRTS MRT-327

SKU# EQ438587N

2 Channel select user station / optional MCP6 Mic., MCS-325 Modular Speaker (not available)

Price:$460.00

Request Info

Intercom
RTS / MRT-327

USEDRTS MRT-327

SKU# EQ501057U

2 Channel select user station / optional MCP6 Mic., MCS-325 Modular Speaker (not available) Good Condition

Price:Click Here to Contact Us

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Model Details

Unique modular design supports five different package arrangements. Inherent operational simplicity makes the MRT-327 a perfect choice for a wide variety of intercom applications. Features microphone limiter circuit, separate headphone and speaker amps and silent channel-select switching. Part of RTS's unique modular packaging system in 1/2 rack by 1 RU metal housing for added durability.
The Model MRT-327 is a two-channel intercom station for use in RTS-TW intercom systems. It may be used as a headset station
or as a speaker station (with an optional MCS-325 Modular Speaker). The MRT-327 may be installed in optional console or rack mount configurations.



Features:

Call Signaling

The MRT-327 can send and receive 20 kHz call signals.

Dual-Action Momentary/Latching Mic Switch

The Mic on/off switch can be used as a momentary push-to-

Remote Deactivation

The MRT-327 can receive 24 kHz "talk-off" signals for deactivation of the MRT-327 microphone from a remote location.

Microphone Limiter

The microphone pre-amplifier circuit contains a limiter which helps to equalize output for different voice levels.

Optional Microphone Speaker & Headset Configurations

The standard MRT-327 accepts an unbalanced, dynamic-mic headset or a dynamic microphone used in conjunction with an external speaker located on the rear panel. It also has a jack for an optional Model MCP-90-xx gooseneck panel microphone. Additionally, the MRT-327 may be internally modified for use with a carbon or balanced-dynamic microphone. It can also be modified to provide the microphone audio as an unswitched, balanced output.

Powering Options

The MRT-327 receives operating power from the intercom line. It may be internally modified for local powering from a separate dc power supply or batteries.



Specifications:

General

Input DC Voltage

Mode: 18 to 35 volts DC

Local 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 ? phones: 75 mA ±10%

Operating, 25 ? phones + call light: 90 mA ±10%

Operating, 8 ? speaker: 240 mA ±10%

Operating, 8 ? speaker + call light: 300 mA ±10%

Operating current is measured with output level at 10

Local power option draws no current from TW line.

DC Current Drawn from TW Line

Notes:

Operating current is measured with output level at 10 dB below clipping.

Local power option draws no current from TW line.

Impedance Across Line

10,000 ?, minimum (designed for use with 200? “TW”

Operating: 0°C to 60°C

Storage: 40°C to 85°C

Humidity

Operating and Storage: 5% to 95%, non-condensing

Noise Contribution

(Ch 2): >-60 dBp

(Ch 1): >-80 dBp

Microphone Preamplifier

Input Impedance

470 ? ±5% (dynamic mic)

Source Impedance

200 ?, nominal

Maximum Input Level

150 millivolts

Frequency Response

(-54dB input): 100 Hz to 8 kHz ±3dB

Limiter Range

30 dB

Carbon Mic Excitation Current

10 mA, nominal

Current Source

Transfer Ratio

3.3 mA/volt = 3.3 millisiemens

Output

3.3 mA into 200 ? = ±1 volt peak, nominal

Speaker Amplifier

Maximum Voltage Gain

30 dB

Frequency Response

100Hz to 8kHz ±4dB

Output Power

1.5 watts into 8 ? nominal

Speaker DIM (speaker muting during mic activation) adjustable, -4 to -30 dB (Factory set to -6 dB)

Headphone Amplifier

Voltage Gain

34 dB

Output Voltage

8 volts peak-to-peak into 25 ? nominal

Output power

½ watt peak into 25 ?

Frequency Response

150 Hz to 10 kHz ±3dB

Headphone Impedance Range

25 to 600 ? (600 to 2000 ? with reduced levels)

Sidetone Adjustment Range

-20 dB to full on

Call Light

Signalling Frequency

20 kHz ±100 Hz

Flashing Rate

5 Hz ±2 Hz

Talk-Off

Frequency

24 kHz nominal

Connectors

Dynamic Microphone Headset

XLR type 6 pin female

Panel Microphone

¼-inch standard phone jack, 3-circuit

Line Input

One (1) XLR type 3-pin female and one (1) XLR type 3-pin male, wired in parallel

Mechanical

Dimensions

1.71" (44 mm) tall, 8.2" (208 mm) wide, x 9.0" (228 mm) deep

Weight

2.75 lbs (1.25 kg)

Construction/Finish

Aluminum case, thermoplastic front panel, light gray finish

 



Additional Information

MRT-327%20Technical%20Data%20Sheet.pdf

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