RTS CM300L A5F 2 Channel Console Mount User Station

Two-channel select console mount user station. Features microphone limiter circuit, separate dynamic and carbon microphone input and silent channel-select switching. Solid metal front and open back for console mounting. The CM 300L uses the MCP-3 mounting kit.

 Features

• On the CM-300L, a toggle switch turns the microphone on or off. When the mic is turned on one (1) or more users talk and the others listen
• Volume control on the CM-300L has a wide range to compensate for: user hearing differences, ambient noise variation, variations in headset/handset sensitivity, and variations in voice
• Channel selector switch allows a choice of 2-channels
• Call light push button transmits a call signal to all other units on the channel selected by the channel selector switch. A call signal on this channel will cause the call light push button to flash. The flash rate is 2 to 5 times a second. The call signal itself is a 20kHz signal

 Specs

• Input DC Voltage:
  • TW Mode: 18 to 35 volts DC
  • LP Option: 15 to 35 volts DC
  • Battery: 12 to 35 volts DC (reduced performance)
• DC Current Drawing from TW Line (Note: LP Option draws no current from TW line):
  • Quiescent:
    • CM-300/RM-300: 23 milliamperes ±10%
    • CM-300/RM-300L: 33 milliamperes ±10%
  • Operating 25 Ohm headphones:
    • CM-300/RM-300: 37 milliamperes ±10%
    • CM-300/RM-300L: 45 milliamperes ±10%
  • Operating 25 Ohm headphones + Call Light: CM-300/RM-300: 60 milliamperes ±10%
• Impedance Across Line: 10,000 ohms, minimum
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Operating and Storage Humidity: 5% to 95% non-condensing
• Noise Contribution:
  • One Unit: -75 dBu
  • Ten Units: -67 dBu
• Microphone Preamplifier:
  • Input Impedance: 470 ohms/dynamic mic
  • Source Impedance: 200 ohms, nominal
  • Maximum Input Level: 150 millivolts
  • Frequency Response: 100 hertz to 10 kilohertz ±3 dB (-54 dBu input)
  • Limiter Range: 30 dB
  • Carbon Mic Excitation Current: 10 millliamperes, nominal
• Current Source:
  • Transfer Ratio: 3.3 milliamperes/volt=3.3 millisiemens
  • Output: ±5 milliamperes into 200 ohms = ±1 volt peak, nominal
• Headphone Amplifier:
  • Voltage Gain: 34 dB
  • Output Voltage: 8 volts peak-to-peak into 25-1/2
  • Output Power: 1/2 watt peak into 25 ohms
  • Frequency Response: 150 hertz to 8 kilohertz ±3dB
  • Headphone Impedance Range: 25 to 600 O (600 to 2000 with reduced levels)
    • Note: Do not use headphones with impedance less than 25 O.
  • Sidetone Adjustment Range: -20dB to full on
• Call-Light:
  • Signaling Frequency: 20,000 hertz ±100 hertz
  • Flashing Rate: 5 hertz ±2 hertz
• Auxiliary Connections:
  • Headset Connector
    • Dynamic Microphone: XLR type 4-pin female
    • Carbon Microphone: 1/4"standard phone jack, 3-circuit
  • Live Connection
    • Input: XLR type 3-pin female
    • Loop/External: XLR type 3-pin female
  • Dimensions: 2.75" (69.9mm) high, 6.25" (158.75 mm) wide, 6.4" (162.6mm) deep
  • Weight: 1.2 lbs (0.55kg)
  • Finish: Front Panel: Light Gray Enamel Paint
  • Federal Standard 595A Color#26492
  • Chassis: Gold Iridite over aluminum