The 1121A audio analyzer provides fast and accurate measurements, including frequency, AC/DC level, distortion, SINAD, and signal-to-noise ratio. It also includes an audio source that delivers precise signals with low distortion across a wide frequency and level range. Frequency range: 10 Hz to 200 kHz Measurement functions: AC/DC level, distortion, SINAD, S/N, frequency Measurement speed: ten readings per second Output impedance: 50, 150, and 600 Ohms Full-scale sensitivity: 300 B5V Common-mode rejection ratio (CMRR): 70 dB Interface: IEEE-488 Features and benefits: Low-distortion audio source for testing systems, amplifiers, receivers, and components Frequency or level scanning Non-volatile memory for instant recall of up to 99 full front panel settings