Rohde & Schwarz NRT-Z44 200MHz-4GHz 120W Directional Power Sensor

The Rohde & Schwarz NRT-Z44 is a directional power sensor engineered for accurate forward and reverse power measurements across 200 MHz to 4 GHz. It delivers precise RF power flow analysis and signal reflection characterization for transmitter testing, antenna validation, and RF generator monitoring in industrial, medical, and R&D environments. The sensor supports modern digital modulation standards and functions as a standalone instrument via digital interface.

Technical Specifications

Frequency Range: 200 MHz to 4 GHz Power Measurement Range

• Average Power: 0.0007 W to 120 W


• Peak Power: Up to 300 W Standing Wave Ratio (50 Ω reference): Maximum 1.06; maximum 1.07 from 0.4 GHz to 3 GHz Insertion Loss


• Maximum 0.06 dB from 0.4 GHz to 1.5 GHz


• Maximum 0.09 dB from 1.5 GHz to 4 GHz Directivity: Minimum 30 dB from 0.4 GHz to 3 GHz Measurement Accuracy (CW): 3.2% of reading (0.14 dB) plus zero offset from 0.3 GHz to 4 GHz Temperature Coefficient: 0.25%/K (0.011 dB/K) from 0.4 GHz to 4 GHz

Key Features

• Average power and peak envelope power (PEP) measurement


• Modulated and unmodulated burst analysis via average power and duty cycle


• Peak-to-threshold exceedance monitoring (CCDF)


• Crest factor determination and power ratio measurement


• Return loss, SWR, reflection coefficient, and reverse-to-forward power ratio analysis


• Amplitude distribution display


• Independent operation with digital interface (RS-232 or PC Card)


• N female connector

Typical Applications Transmitter and antenna testing across GSM/EDGE, WCDMA, CDMA2000®, TETRA, DECT, DAB, and DVB-T systems. Power monitoring in radiocommunications infrastructure and signal reflection assessment in RF system validation.

Compatibility & Integration Operates independently or integrates with base units via direct PC connection. Compatible with predecessor NAP sensor systems via optional hardware.