Rohde & Schwarz NAP-Z5 25-1000MHz 350W RF Power Sensor

The Rohde & Schwarz NAP-Z5 is a directional RF power sensor engineered for accurate measurement of transmitted and reflected power across the 25 MHz to 1 GHz frequency band. Operating from 0.2 W to 350 W (−60 dBm to +43 dBm), it delivers measurement uncertainty of 6% maximum of reading plus zero offset at 20–25 °C, with directivity exceeding 26 dB.

Technical Specifications

• Frequency range: 25 MHz to 1 GHz


• Power measurement range: 0.2 W to 350 W (−60 dBm to +43 dBm)


• Input impedance: 50 Ω


• Connectors: N(m) / N(f) Performance Data


• Measurement type: Transmitted and reflected power


• Average power measurement uncertainty: 6% max. of reading, plus zero offset (20–25 °C)


• Directivity: ≥26 dB


• SWR (50 Ω reference): 1.03


• VSWR error: ≤1.25 typical 5%; >1.25 to 2 typical 8%


• Insertion loss: 0.8 dB (to 0.3 GHz), 0.15 dB (to 0.5 GHz), 0.2 dB (to 1 GHz)


• Reflection measurement range: 0–23 dB / 1.15 to ∞ / 0.07 to 1 (30 MHz to 1 GHz) Operational Characteristics


• AM burst width minimum: 20 µs


• Repetition rate: 30 Hz to 10 kHz


• Physical dimensions: 118 mm × 105 mm × 45 mm


• Weight: 0.6 kg

Key Features

• Directional sensor with ≥26 dB directivity for simultaneous forward and reflected power measurement


• Low insertion loss across the operating range ensures minimal system impact


• Compact form factor at 0.6 kg enables bench and field deployment


• SWR of 1.03 provides excellent return loss characteristics

Typical Applications

• RF system testing and optimization requiring simultaneous forward/reflected power data


• Component characterization in the VHF to UHF frequency bands


• Power amplifier validation and impedance matching assessment


• Transmission line and antenna performance evaluation

Compatibility & Integration The NAP-Z5 interfaces with Rohde & Schwarz NAP and NRT Power Meters via standard RS-232 serial connection and PC Card interface. Operation via NRT-B1 option on the NRT base unit is supported. Sensor cable (D-SUB 15 pin male, 1 m typical) provided.