Test – Leader LAG 120B Audio Generator
LAG-120B Audio Generator
Overview
The Leader LAG-120B is a precision, wide-band audio sine/square-wave generator designed for bench-top use. It delivers exceptionally low distortion (< 0.05%) over a 10 Hz to 1 MHz span, with selectable output levels via a 50 dB step attenuator plus a 20 dB variable control. A double-geared, backlash-free frequency dial and five-decade range switches enable smooth, accurate tuning, and a rear-panel SYNC-IN lets you lock its output to an external source
Key Specifications
Parameter | Value |
|---|---|
Frequency Range | 10 Hz – 1 MHz (5 decades) |
Frequency Accuracy | ±(3% + 1 Hz) |
Sine-Wave Output Level | 3 V rms into 600 Ω (≈ +12 dBm) |
Sine-Wave Distortion | ≤ 0.05% (500 Hz – 20 kHz) |
Square-Wave Output Level | 3 V p-p into 600 Ω |
Square-Wave Rise Time | 200 ns |
Attenuation Range | 70 dB total (50 dB in 10 dB steps + 20 dB var.) |
Output Impedance | 600 Ω ± 10%, unbalanced |
Sync-In Lock Range | ± 1% of dial frequency per volt rms input (max 10 V rms) |
Termination Accessory | 600 Ω terminator (LT-2040) |
Power Requirements | 100/120/220/240 VAC, 50/60 Hz, 6.5 VA |
Size (W × H × D) | 132 × 150 × 250 mm (5.25 × 6 × 9.875 in) |
Weight | 3 kg (6.5 lb) |
Specifications compiled from Leader LAG-120B datasheets and datasheet summaries.
Applications and Uses
- Testing and servicing audio amplifiers, preamplifiers, mixers, and other audio-frequency equipment
- Measuring frequency response of filters, equalizers, and speaker crossovers
- Verifying gain stages and level calibration in studio and broadcast gear
- Distortion analysis and harmonic content checks using low-distortion sine outputs
- Loudspeaker and transducer testing with both sine and square-wave stimuli
- Signal-injection troubleshooting in audio signal paths and cable assemblies
- Circuit performance checks and timing analysis using fast rise-time square waves
- Educational labs and technical training for audio electronics fundamentals
- R&D and production-line verification of analog-audio components
- Calibration and linearity testing of ADCs/DACs and audio converters
Whether you’re maintaining studio consoles, calibrating high-fidelity amplifiers, or teaching electronics labs, the LAG-120B brings reliable, high-performance signal generation to any audio-test bench.
Conclusions
Concluding comments
1. This page was done engineering notebook style – Someday in the future it might be added to and typed up in a spreadsheet
2.This is a current system ‘Standard’ subject to revision.