Keithley 2015 THD – Multimeter and Distortion Analyzer

Keithley 2015 THD is a high-precision measuring instrument with 6.5-digit resolution, combining the functions of a digital multimeter and an audio signal analyzer. It is designed for measuring Total Harmonic Distortion (THD) in the audio frequency range from 20 Hz to 20 kHz, as well as calculating THD+Noise, Signal-to-Noise Ratio (SNR), and Distortion (SINAD).

Main Features

• Built-in sine wave generator: provides output voltage up to 4 V RMS (single-ended) or 8 V RMS (differential) for testing audio devices.
• Fast frequency sweeps: allow quick characterization of audio frequency circuits in production test systems.
• Individual harmonic measurement: ability to analyze up to 64 harmonics for detailed signal spectrum analysis.
• Five standard audio filters: include CCITT, CCIR, C-message, CCIR/ARM, and "A-weighting" filters for various applications.
• 13 digital multimeter functions: include voltage, current, resistance, frequency, temperature measurements, and more.

Additional Features

The 2015-P model additionally includes spectral analysis capability, enabling identification and analysis of peak components in the spectrum. This is especially useful for testing audio devices and components.

By combining high-precision multimeter functions with advanced audio signal analysis, Keithley 2015 THD is a versatile tool for engineers and professionals working in audio testing and electronic component development.