Anritsu MA2475D Series – Standard Diode Sensors (CW)

The Anritsu MA2475D is a standard diode sensor for high-accuracy continuous wave power measurements across extended frequency ranges. Built on zero-bias Schottky diode rectifiers with low-pass filtered envelope detection, the sensor delivers dynamic range from -70 dBm to +20 dBm with linearity better than 1.8% from -70 dBm to +15 dBm, plus an additional 1% above +15 dBm. Rise time of 4 µs enables reliable measurements on TDMA systems using GMSK modulation. The sensor stores calibration data - including frequency, power, and temperature dependencies - in internal EEPROM, enabling automatic correction and interpolation by compatible power meters. Frequency-dependent linearity specifications range from 1.8% up to 18 GHz, 2.5% up to 40 GHz, and 3.5% up to 50 GHz. Standing wave ratio performance varies across the frequency spectrum, optimized for minimal reflections at each band. The V-connector interface (1.85 mm) with precision hexagon coupling nut ensures reliable RF coupling.

Technical Specifications

Frequency Range: 10 MHz to 50 GHz

Dynamic Range: -70 dBm to +20 dBm

Linearity: Better than 1.8% (-70 dBm to +15 dBm); additional 1% above +15 dBm

Sensor Linearity by Frequency: 1.8% to 18 GHz; 2.5% to 40 GHz; 3.5% to 50 GHz

Rise Time: 4 µs

SWR (Frequency-Dependent): <1.17 (10–150 MHz); <1.12 (150 MHz–2 GHz); <1.22 (2–12.4 GHz); <1.25 (12.4–18 GHz); <1.35 (18–32 GHz); <1.50 (32–40 GHz); <1.63 (40–50 GHz)

RF Connector: V-type (1.85 mm)

Weight: 2 lbs

Key Features

Zero-bias Schottky diode sensing elements with envelope detection

Automatic calibration correction via embedded EEPROM interpolation

Frequency-, power-, and temperature-compensated measurements

Precision RF coupling with torque-controlled hexagon nut

Typical Applications

CW power measurement in RF research and development

TDMA system characterization (GSM, similar standards)

Production analysis and field testing of RF components

High-accuracy power monitoring across microwave and millimeter-wave bands

Compatibility & Integration

Anritsu ML2430, ML2480, and ML2490 series power meters

PowerMax™ software (ML2480B, ML2490A)

PowerSuite software (ML2430A)