Anritsu MA2425B Fast Thermal Sensor, 10MHz to 50GHz

The Anritsu MA2425B is a broadband thermal power sensor engineered for rapid, accurate RF power measurements spanning 10 MHz to 50 GHz. Using Seebeck element technology with true-RMS detection, it delivers settled power readings up to 10 times faster than conventional thermal sensors—with rise and fall times below 4 ms each. This speed advantage directly reduces test cycle time in production and field environments.

– Technical Specifications

-# Frequency and Power
• Frequency Range: 10 MHz to 50 GHz
• Dynamic Range: 50 dB
• Measurement Principle: Thermal power sensing with true-RMS detection
• Rise Time: < 4 ms
• Fall Time: < 4 ms

-# Connectors and Physical Interface
• RF Connector: V(m) type (1.85 mm)

-# Calibration
Internal EEPROMs store frequency-dependent, power-dependent, and temperature-dependent calibration coefficients. The connected power meter automatically interpolates and applies corrections during measurement, eliminating the need for manual calibration adjustments across the frequency and power range.

– Key Features

• Thermal detection enables accurate average power measurement of any signal modulation type
• 50 dB dynamic range supports both high-power and low-level signal characterization
• Sensor-resident calibration data eliminates external calibration references
• Sub-4 ms response time accelerates measurement throughput in high-volume test applications
• Compact form factor with V-type RF connector for direct integration into test benches

– Typical Applications

• Broadband RF power measurement and validation
• Power amplifier characterization and efficiency testing
• Transmitter output power verification across microwave and millimeter-wave bands
• Automated test systems requiring fast thermal power sensing

– Compatibility & Integration

The MA2425B integrates with the Anritsu ML2430A Series Power Meters, which interpret the sensor's stored calibration data and execute real-time measurement correction and interpolation.