Keithley 2015-P/J – Total Harmonic Distortion and Audio Analyzer Multimeter, 6.5-Digit

The Keithley 2015-P/J is a 6.5-digit Total Harmonic Distortion (THD) and Audio Analyzer Multimeter that combines high-performance digital multimeter capabilities with advanced THD analysis. Engineered for precision audio measurements across the 20 Hz to 20 kHz band, this instrument delivers accurate voltage, current, resistance, frequency, and distortion characterization essential for audio equipment testing and quality control.

## Technical Specifications

• **Resolution:** 6.5 digits maximum
• **THD Measurement:** Total Harmonic Distortion over 20 Hz–20 kHz audio band; THD+Noise and SINAD analysis
• **Harmonic Analysis:** Up to 64 individual harmonic magnitudes with user-selectable count for optimized accuracy and speed
• **Frequency Domain:** 20 Hz–20 kHz fundamental range; 40 Hz–50 kHz harmonic range; 0.008 Hz resolution; ±0.01% reading accuracy; ≤100 ppm temperature coefficient
• **DMM Functions:** DC Voltage, AC Voltage, DC Current, AC Current, 2-Wire and 4-Wire Resistance, temperature, frequency, period, dB, dBm, continuity, and diode testing
• **Audio Shaping Filters:** Five standard filters including CCITT weighting, CCIR, C-message, CCIR/ARM, and A-weighting; programmable high-pass and low-pass filters (20 Hz–50 kHz)
• **Low Residual Distortion:** –87 dB
• **Sine Wave Source:** Dual output with inverse capability; 2 V rms (50Ω and 600Ω) or 4 V rms (HI Z); –64 dB THD; 100 µV rms noise; ±1.2 mV DC offset
• **Source Impedance:** 50Ω ± 1Ω or 600Ω ± 10Ω, user selectable

## Key Features

• Fast frequency sweeps: 30-frequency sweep execution and data transmission in 1.1 seconds
• High measurement speed: 50 triggered readings/s over IEEE-488 at 6½ digits
• Production-optimized testing enables reduced cycle times without measurement degradation
• Peak frequency spectrum identification

## Typical Applications

Audio equipment quality control and validation; audio amplifier and speaker characterization; frequency response and distortion profiling; differential input circuit testing; production test automation.

## Compatibility & Integration

IEEE-488 interface support for automated test environments and remote operation.