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: Condenser, back electret

MIC Polar Pattern:
7501A: Omnidirectional
7502A: Unidirectional
7503A: Omnidirectional

MIC Frequency Response:
7501A: 30 Hz - 15 kHz
7502A: 90 Hz - 18 kHz
7503A: 50 Hz - 10 kHz

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-B utilizes the latest technology to create a superior quality wireless microphone system. The system consists of a true diversity dual-receiver and body-pack transmitter.
The 7500B-B 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 7500B-B system offers the choice of three different lavalier microphones. Two units, the 7501A and 7503A, are omnidirectional microphones specifically designed for broadcast and sound reinforcement applications where feedback
problems are minimal. The unit's omnidirectional polar characteristic provides a uniform output regardless of the direction of the sound.
The third unit, the 7502A unidirectional microphone, was designed for similar applications but where feedback problems frequently occur. The unit's unidirectional polar characteristic provides excellent gain-before-feedback control.
The bodypack transmitter incorporates 2:1 compander audio processing circuitry for clean, crisp, natural sound. The transmitter is equipped with a silent on/off audio switch. This eliminates noise and RF interference when the microphone is turned on and off. The LED indicator displays when the unit is turned on, when the battery power is low, and when the input is overdriven.