Agilent/Keysight 8901A

The Agilent/Keysight 8901A Modulation Analyzer is a single-instrument solution for RF signal characterization, combining modulation meter, frequency counter, and power meter functionality. Operating from 150 kHz to 1.3 GHz, it delivers precise AM, FM, and PM measurements across communication systems, R&D, and field maintenance environments.

– Technical Specifications

RF Input
• Frequency Range: 150 kHz to 1300 MHz
• Operating Level: 150 kHz to 650 MHz at −25 dBm to +30 dBm; 650 MHz to 1300 MHz at −20 dBm to +30 dBm
• Input Impedance: 50 Ω nominal
• Maximum Safe Input: 35 Vrms AC, 25 W (source SWR 50 dB automatic; > 90 dB manual
• Accuracy: ±3 counts ± reference accuracy
• Acquisition Time: ~1.5 seconds in automatic mode

RF Power Measurement
• Range: 1 mW to 1 W
• Instrumentation Accuracy: ±1.5 dB (150 kHz to 1300 MHz), 0.7 dB typical
• Peak Envelope Power Accuracy (AM): ±1.5 dB
• SWR: 5% depth)
• FM: 20 Hz to 200 kHz rates, deviations to 400 kHz peak, ±1% to ±5% accuracy depending on rate
• Residual AM: < 0.02% rms (50 Hz to 3 kHz BW)

– Key Features

• Automatic frequency tuning and tracking above 10 MHz with manual entry option
• Diode detection power measurement calibrated for sine wave inputs
• HP-IB programmability for automated test sequences
• Peak voltage measurement technique for modulation envelope analysis

– Typical Applications

• AM/FM transmitter characterization and calibration
• Modulation quality verification in communication systems
• Field maintenance and signal parameter verification
• Laboratory R&D modulation testing

– Compatibility & Integration

HP-IB interface enables integration into automated test systems and remote measurement configurations.