8201 Modulation Analyzer The Model 8201 provides precision modulation and audio analysis in a single, easy-to-operate package. Measures AM, FM, PM, carrier and audio frequencies, SINAD, distortion and carrier level. • Carrier frequency range: 100 kHz to 2.5 GHz • 0 to 500 kHz FM deviation to 1% accuracy • 0 to 99% AM to 1% accuracy • 0 to 500 radians to 3% accuracy • Audio distortion range 0.01% to 100% THD or 0 to 80 dB SINAD • GPIB