The Agilent HP Keysight 8901B Modulation Analyzer characterizes modulated RF signals from 150 kHz to 1.3 GHz. This single instrument integrates a power meter, modulation analyzer, frequency counter, and audio analyzer with full GPIB programmability. It delivers AM and FM modulation accuracy to 1%, phase modulation to 3%, and power measurements from −20 dBm to +30 dBm with the 11722A sensor or −70 dBm to +44 dBm with 8480 series sensors.
Technical Specifications
• Frequency Range: 150 kHz to 1.3 GHz
• Modulation Types: AM, FM, Phase Modulation (φM)
• Modulation Accuracy: AM/FM ±1%; φM ±3%
• RF Power Measurement: −20 to +30 dBm (with 11722A); −70 to +44 dBm (with 8480 series)
• Power Meter Linearity: ±0.02 dB plus ±0.02 dB per range change
• Frequency Counter Resolution: 10 Hz
• Audio Measurement: 6-digit frequency resolution; distortion measurement at 400 Hz and 1000 Hz; RMS levels 100 mV to 3 V (±4% accuracy)
• Adjacent Channel Power: ±0.5 dB accuracy; >115 dB dynamic range; >90 dB selectivity
• Carrier Noise (with Options 030–037): SSB measurements to 1.3 GHz; ±0.5 dB to −129 dBc/Hz; −150 dBc/Hz noise floor
• Display: 10-digit LED
• Memory: Eight non-volatile locations
– Key Features
• Integrated power meter, modulation analyzer, frequency counter, and audio analyzer in one unit
• Channel filters: 12.5 kHz, 25 kHz, 30 kHz spacing
• Front panel 50 MHz power reference (±0.7%, traceable to U.S. National Bureau of Standards)
• Meets CEPT standards for adjacent channel power
• Eight configurable measurement memory slots
• GPIB full automation and programmability
– Typical Applications
• RF design and signal characterization
• Modulation quality testing and validation
• Power and frequency measurement across UHF/microwave bands
• Audio distortion and RMS analysis
• Carrier noise performance evaluation
– Compatibility & Integration
Works with Agilent 8480 series power sensors for extended dynamic range. Optional modules add rear-panel connections, high-stability reference (1×10⁻⁹), external oscillator support, and extended low-frequency operation (48–440 Hz below 40°C).
