The Keithley 2015-P is a 6.5-digit Total Harmonic Distortion (THD) and Audio Analyzer Multimeter engineered for precision audio device characterization. It combines a high-resolution digital multimeter with dedicated audio analysis capabilities, delivering THD, THD+Noise, SINAD, and frequency measurements alongside standard DC/AC voltage, current, resistance, and temperature functions.
## Technical Specifications
**Distortion Measurement**
• Voltage Range: 100 mV, 1 V, 10 V, 100 V, 750 V (user selectable)
• Input Impedance: 1 MΩ || <100 pF
• Display Range: 0–100% or 0–100.00 dB
• Resolution: 0.0001% or 0.00001 dB
• Fundamental Frequency: 20 Hz–20 kHz
• Harmonic Frequency: 40 Hz–50 kHz
• Frequency Resolution: 0.008 Hz
• Frequency Accuracy: ±0.01% of reading
• Selectable Harmonics: 2 to 64 in THD calculation
• HI/LO Cutoff Filters: 20 Hz–50 kHz, configurable as brickwall bandpass
**Measurement Accuracy (1 Year, 23°C ±5°C)**
• THD and harmonic magnitudes: ±0.8 dB, 0.004%, or –87 dB (20 Hz to 20 kHz)
• THD+Noise: ±1.5 dB, 0.056%, or –65 dB (100 Hz to 20 kHz)
• SINAD: ±1.5 dB, +65 dB (100 Hz to 20 kHz)
**Signal Generation**
• Waveform: Sinewave
• Frequency Range: 10 kHz–20 kHz
• Amplitude: 2 V rms (50 Ω / 600 Ω) or 4 V rms (HI Z)
• Amplitude Resolution: 0.5 mV rms (50 Ω / 600 Ω) or 1 mV rms (HI Z)
• Amplitude Accuracy: ±(0.3% of setting + 2.5 mV)
• Output Impedance: 50 Ω ±1 Ω or 600 Ω ±10 Ω (user selectable)
• Generator THD: –64 dB
• Generator Noise: 100 µV rms
• Maximum Output: 4 V rms single-ended or 8 V rms differential
**Reading Rates**
• Single Acquisition: 14–28 readings/second (frequency dependent)
• Automatic Mode: 5.5–6.6 readings/second (frequency dependent)
• Frequency Sweep: 5–200 frequencies in 0.2–6.9 seconds
## Key Features
• Configurable harmonic analysis from 2 to 64 terms
• Programmable bandpass filtering for targeted distortion measurement
• Dual-impedance source output (50 Ω and 600 Ω)
• Differential and single-ended generation modes
• Temperature coefficient stability: ≤100 ppm (frequency), typically 0.015%/°C (amplitude)
## Typical Applications
Design verification and production testing of audio amplifiers, DAC/ADC devices, analog filters, and consumer audio equipment. Frequency sweep capability supports rapid characterization across the audible spectrum.
## Compatibility & Integration
The instrument's dual output impedance options and INV/PULSE output accommodate standard audio industry impedance standards and test configurations.
