Rohde & Schwarz ZNB8 8.5GHz Vector Network Analyzer

The Rohde & Schwarz ZNB8 is a vector network analyzer engineered for precision RF component characterization across 9 kHz to 8.5 GHz. It delivers dynamic range up to 140 dB, sweep times as fast as 4 ms for 401 points, and measurement speed better than 5 µs per point. Available in two-port and four-port configurations - the four-port model includes two independent internal generators.

The instrument supports expansion to 48 ports via switch matrices and offers electronically adjustable output power over more than 95 dB range.

Technical Specifications

Frequency Range: 9 kHz to 8.5 GHz Port Configurations: Two-port and four-port models; four-port includes dual independent generators Dynamic Range: Up to 140 dB at 10 Hz IF bandwidth; extended option (ZNB8-B5x) reaches 150 dB for inter-port measurements Measurement Speed: 4 ms minimum sweep time (401 points); 5 µs per point or better Output Power: Maximum +13 dBm; adjustable over 95–98 dB range IF Bandwidth: 1 Hz to 10 MHz Stability & Noise: Temperature coefficient 0.01 dB/°C or better; phase drift <0.15°/°C; trace noise <0.004 dB RMS at 10 kHz IF bandwidth Display: 12.1" high-resolution touchscreen

Key Features

• Wide dynamic range with optional extended performance (150 dB)


• Sub-millisecond sweep capability for high-throughput production


• Automatic and manual calibration methods; TSM calibration offers TOSM-equivalent accuracy with fewer steps


• Automatic calibration units support up to 24 ports


• Receiver step attenuators available for ports 1–4 (30 dB in 10 dB increments)


• Extended power range option (B24) down to −80 dBm


• GPIB interface option (B10) for system integration


• Fast synthesizer settling contributes to rapid measurement cycles

Typical Applications Component and subsystem validation; production test environments requiring high-speed throughput; multi-device characterization via switch matrix expansion; demanding laboratory and manufacturing settings.

Compatibility & Integration Supports expansion to 48 ports using switch matrices. GPIB connectivity available. DC inputs option (B81) for extended measurement capability.