Leader LAG-120B Audio Generator

The Leader LAG-120B is a precision audio generator engineered for testing and servicing audio equipment across professional and laboratory settings. It delivers sine and square waveforms from 10 Hz to 1 MHz with exceptional frequency accuracy and low distortion characteristics. The dual-output design supports independent amplitude control with 6-step attenuation plus continuous variable adjustment, providing greater than 50 dB total range. A 600 Ω output impedance matches standard audio test configurations, while external synchronization capability enables phase-locking to external frequency sources.

– Technical Specifications

Frequency Performance
• Range: 10 Hz to 1 MHz across 5 decade selectable ranges
• Dial accuracy: ± (3% + 1 Hz)
• Output flatness: ± 0.5 dB into 600 Ω load (referenced at 1 kHz)

Sine Wave Output
• Maximum level: 3 V rms into 600 Ω termination (+12 dBm)
• Distortion: ≤ 0.05% (500 Hz to 20 kHz), ≤ 0.4% (50 Hz to 200 kHz), ≤ 0.8% (20 Hz to 500 kHz), ≤ 1.5% (10 Hz to 1 MHz)

Square Wave Output
• Level: 3 V p-p into 600 Ω termination
• Rise time: 200 ns
• Sag: 5% or less
• Overshoot: 2% or less at maximum output

Amplitude Control
• Output impedance: 600 Ω ± 10%, unbalanced
• 6-step attenuator: 10 dB steps, up to 50 dB attenuation
• Continuous variable control: approximately 20 dB adjustment range
• Combined maximum attenuation: greater than 70 dB
• Open circuit output: approximately 25 V p-p

External Synchronization
• Lock range: ± 1% of dial frequency per volt rms input
• Maximum input: 10 V rms

– Key Features

• Double-geared frequency dial with backlash-free operation
• 5 decade switches for rapid frequency range selection
• Sine and square waveform switching
• 600 Ω terminator (LT-2044) included
• Internally selectable power supply: 100, 120, 220, or 240 V ac (50/60 Hz)
• Power consumption: approximately 6.5 VA

– Physical & Operational

Dimensions: 5.25 x 6 x 9.875 inches (132 x 150 x 250 mm). Weight: 3 kg (6.5 lbs).

– Typical Applications

Audio equipment testing, system integration verification, frequency response measurement, and laboratory-grade signal sourcing for audio engineering.