Anritsu MA2481D Universal Sensor, 10MHz to 6GHz

The Anritsu MA2481D is a universal RF power sensor delivering true RMS average power measurements across 10 MHz to 6 GHz. Built for wireless system testing, antenna characterization, and amplifier validation, it handles CW, multi-tone, and modulated waveforms including 3G, 4G, and OFDM signals with ±3% linearity and an 80 dB dynamic range. The sensor employs three pairs of diodes operating in the square law region, each calibrated and stored in EEPROM for field deployment without external calibration dependencies.

Technical Specifications

• Frequency Range: 10 MHz to 6 GHz


• Dynamic Range: −60 dBm to +20 dBm (80 dB span)


• Sensor Linearity: ±3% (10 MHz to 6 GHz, −60 dBm to +20 dBm); ±3.5% (0 dBm to +20 dBm); ±1.8% CW with Option 1


• Rise Time: < 0.004 ms (Option 1 only)


• SWR: < 1.17 (10 MHz to 150 MHz); < 1.22 (150 MHz to 2 GHz); < 1.25 (2 GHz to 12.4 GHz)


• RF Connector: N-type male with precision coupling nut


• Calibration Storage: Internal EEPROM

Key Features

• True RMS detection for accurate average power across any signal type


• Multi-diode architecture ensures consistent performance throughout dynamic range


• Option 1 enables TDMA measurement capability and optimizes CW linearity to ±1.8%


• Option 1 provides < 0.004 ms rise time for fast transient capture


• Precision RF connector with standard torque wrench interface

Typical Applications

• Wireless system characterization and validation


• Antenna testing and tuning


• Amplifier performance qualification


• Multi-tone and modulated signal power measurement


• 3G, 4G, and OFDM signal power monitoring

Compatibility & Integration The MA2481D integrates with Anritsu ML2400A, ML243xA/B, ML2480A/B, and ML2490A series power meters. Firmware revision 3.10 or higher is required when pairing with ML2407A/08A and ML2437A/38A meters.