COMTEK M-216P Digitally Synthesized Wireless Microphone Transmitter

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The M-216 wireless microphone transmitter offers the ultimate performance and versatility for assistive listening, language interpretation, tour guide presentations, personal cueing, and for other personal remote transmission situations. For use with the PR-216 and PR-216 Option 7 synthesized receivers.

The M-216 incorporates the latest digital and analog technologies to produce low residual noise, wide dynamic range, and extended frequency response rendering the most natural sound possible from a wireless microphone.

The transmitter's micro controller automatically sets the modulation deviation, companding or non-companding audio processing, and the EQ when corresponding channels are selected. Because of this comprehensive feature, this versatile transmitter can transmit on 19 high fidelity channels and 38 standard channels ensuring compatibility with receivers conforming to regulations regarding Low Power Radio Service (LPRS) transmissions in the 216-217 MHz band under Part 95 of the FCC regulations.

• Audio Input:
  • Microphone input impedance for electret type microphone - 3k ohm
  • Aux/Line input impedance - 10k ohm at 0 dB nominal
• Connectors:
  • Microphone - Micro-mini mono 2.5 mm
  • Auxiliary - Mini stereo 3.5 mm
    • Audio: Tip and sleeve
    • Battery Charging: + Tip, - sleeve
    • 9 volt DC input: + Ring, - sleeve (with current limiting)
• Controls & Indicators:
  • Synthesized channel selection switches
  • Power On/Off switch
  • Optional microphone muting switch
  • Audio input gain control
  • Power/Battery status indicator
  • Audio (voice level) modulation indicator
• Frequency Response: 80 Hz to 10 kHz
• Audio Distortion: <1% (80% modulation)
• Modulation Limiter: Soft compressor with 30 dB linear overload protection, attack time - less than 1 ms, recovery time - 10 ms
• Frequency Modulation: 10 kHz deviation
• Operating Radio Frequency: 57 synthesized frequencies in the 216-217 MHz
  LPRS band under FCC part 95
• Out-of-Band Emissions: Better than 45 dB below carrier
• R.F. Stability: 20 ppm XTL controlled
  Digitally synthesized
• RF Power Output: 10 mW to antenna system
• Antenna System: Body-worn microphone cord, or whip plugged directly into microphone connector when auxiliary input is used
• Current Drain: 18 mA constant current
• Battery:
  • 9 volt alkaline Eveready 522 or equivalent for up to 30 hours of operation
  • 9 volt Nickel-Metal Hydride rechargeable battery for up to 10 hours of operation
• FCC Compliance: Certification under Part 95
• Dimensions: 1 1/6 x 2 1/4 x 3 1/4 in | 27 x 57 x 83 mm)
• Weight: 5.4 oz | 153 g (w/ clip)