Auto Nulling Feature Speeds Measurements Measures THD, Signal Level
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Semi-Automatic Distortion Meter
Auto Nulling Feature Speeds Measurements Measures THD, Signal Level
Cost Effective task making distortion measurements audio equipment systems greatly simplified with Leader's LDM-171.This semi-automatic distortion meter features automatic nulling mode that enables rapid error-free measurements below eliminating almost manual tuning, increasing productivity same time. LDM-171 also features measurements signal level measurements over wide range further enhancing value instrument audio bench. high-pass filter (cut-off frequency monitor output terminals identifying distortion products provided.All this versatility packaged into compact, neatly designed instrument certainly welcome addition audio bench.
LDM-171
Function switches select mode distortion, signal-tonoise ratio volt/millivolt measurement. Input terminals accept level measurements S/N. level range switch more than third full scale deflection relative input signal level ratio measurements. level vernier full scale reference 0.35 rms. Output monitoring characterizing distortion noise products oscilloscope.
Range switches used enter level mode, then select measurement range sensitivity. Mode switch selects auto-nulling less speed measurements. Frequency fine control used during manual distortion measurements. Frequency range vernier nulls fundamental frequency component during measurements. Balance coarse/fine controls used balance bridge during distortion measurements.
SIGNAL-TO-NOISE RATIO MEASUREMENTS Range below reference level Input Level 0.35 Input Impedance LEVEL MEASUREMENTS Range ranges Frequency Range Minimum Reading Accuracy full scale Input Impedance FILTER High-Pass point dB/octave MONITOR OUTPUT Output Voltage full scale Output Impedance POWER REQUIREMENTS 100, 120, 220, 50/60 Operating Temperature 40°C PHYSICAL Size 113/4 97/8 Weight lbs., SUPPLIED ACCESSORY Dual Banana Plug Alligator Cable
DISTORTION MEASUREMENTS Ranges 0.1, 0.3, 100% full scale Automatic Nulling Ranges 0.1%, 0.3% 1.0% full scale Minimum Distortion Read 0.01% Accuracy Within full scale Frequency Range ranges Input Level Range 0.35 ranges Input Impedance Fundamental Frequency Suppression harmonic flatness within Harmonic Bandwidth kHz, Residual Distortion 0.01%
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