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7500B-H True Diversity Dual-Receiver Wireless Microphone System

 

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7500B-H True Diversity Dual-Receiver Wireless Microphone System

KEY SYSTEM SPECIFICATIONS
RF Frequency Range: 169 - 186 Mhz.

Working Range: Up to 1000 ft under ideal conditions; usually somewhat less in typical applications.

Receiver Type: Single frequency, single conversion, superheterodyne FM.

Receiver Sensitivity: 1.6 µV for 50 dB S/N (processed), 20 kHz bandwidth.

Dynamic Range: 105 dB.

MIC Element: Neodymium supercardioid.

MIC Frequency Response: 60 Hz to 14 kHz, ±1.5 dB, 30 Hz to 16 kHz, ±3 dB.

MIC Ultimate S/N: (processed, 20 kHz bandwidth) 105 dB (flat) minimum (108 dB typical A-weighted).

KEY FEATURES
• True Dual-Receiver Space Diversity System
• Utilizes 2:1 Compander Audio Processing
• 50 mW Transmitter for Largest Coverage Area


The Altec Lansing 7500B-H utilizes the latest technology to create a superior quality wireless microphone system. The system consists of a true diversity dual-receiver and super-cardioid microphone/transmitter.
The 7500B-H incorporates a single-frequency, single-conversion, superheterodyne FM receiver. The dual-receiver space diversity design increases range and assures freedom from drop-outs caused by multi-path signals. Thus, "phase cancellation" from reflected signals is virtually non-existent.
The microphone of the 7500B-H system employs a neodymium supercardioid microphone element. Use of the revolutionary neodymium alloy magnet yields four times the power potential of conventional microphone magnets.

The design of the neodymium magnetic structure is computer optimized to provide higher output sensitivity. A more uniform magnetic field lowers distortion during peak sound pressure levels.
The large diaphragm has 50 percent more surface area than conventional designs and is reinforced to prevent "breakup". The result is an extended high-frequency response with an open, transparent sound quality.
The transmitter section of the microphone incorporates 2:1 compander audio processing circuitry for clean, crisp, natural sound. The transmitter is equipped with a silent on/off mute switch. This eliminates noise and RF interference when the microphone is turned on and off.

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