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Automatic Distortion Meter

Automatic Distrotion Meter
The GAD-201G distortion meter is aimed at total harmonic distortion (THD) and AC voltage measurement at audio frequency range, from 20 ~ 20kHz. Frequency and voltage value are displayed simultaneously on dual meters, with measurement range automatically switching over full scale. Shortcut keys are provided for commonly used 400Hz, 1kHz, and 10kHz measurement. Output terminal feeds basic waveform (X) and harmonic distortion (Y) to external monitoring device. Residual distortion, including hum and noise, is kept at a minimum level of 0.03%, making the GAD-201G ideal for high-class audio application.

 

Features

  • Automatic level & distortion measurements
  • Auto or Hold function selectable
  • 0.1% ~ 100% in 7 distortion measuring ranges
  • 20Hz ~ 20kHz in 3 continuous ranges
  • 400Hz, 1kHz, 10kHz 3 frequency spots
  • 1mVrms ~ 300Vrms in 12 ACV measuring ranges
DISTORTION MEASUREMENT
Range 0.1% ~ 100% full scale in 7 ranges (auto ranging)
Fundamental Frequency Range 20Hz ~ 20kHz in 3 continuous ranges with fine adjustment tuning
3 spots for 400Hz, 1kHz, 10kHz
Input Level 100mVrms ~ 300Vrms
Automatic Level Control Range ±10dB
Fundamental Rejection > 80dB
Second Harmonic Accuracy ±1dB at basic frequency 20Hz ~ 20kHz
Residual Distortion < 0.03% including hum and noise
AC VOLTAGE MEASUREMENT
Range 1mVrms to 300Vrms full scale in 12 ranges (auto-ranging)
Frequency Response 20Hz ~ 200kHz ±1dB
Imput Impedance 100kΩ ±10%, <70pF (unbalanced)
Accuracy ±3% of full scale (@ 1kHz)
Residual Noise < 10uV (input short circuit)
Output Level X:1Vrms, Y:500Vrms at meter full scale
Output Impedance Approx. 600Ω
POWER SOURCE
  AC 100V/120V/220V/240V ±10%, 50/60Hz
DIMENSIONS & WEIGHT
  310(W) × 165(H) × 300(D) mm
Approx. 4.6kg
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Features Automatic level & distortion measurements Auto or Hold function selectable 0.1% ~ 100% in 7 distortion measuring ranges 20Hz ~ 20kHz in 3 continuous ranges 400Hz, 1kHz, 10kHz 3 frequency spots 1mVrms ~ 300Vrms in 12 ACV measuring ranges ..
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