Rohde & Schwarz ZNB26 26.5GHz Vector Network Analyzer

The Rohde & Schwarz ZNB26 is a benchtop vector network analyzer operating from 100 kHz to 26.5 GHz with 2 or 4 test ports. It delivers dynamic range up to 150 dB (base unit 140 dB), trace noise below 0.004 dB RMS at 10 kHz IF bandwidth, and output power to +13 dBm with extended range down to -60 dBm on 2-port models. Fast sweep times reach 4 ms for 401 points.

The instrument features 1 Hz frequency resolution, 42–46 dB directivity, and excellent magnitude and phase stability below 0.01 dB/°C and 0.15°/°C respectively. A 12.1-inch touchscreen display, USB interface, and optional second internal generator support frequency-converting and active device measurements. Characterized by low drift, high temperature stability, and embedding/de-embedding capabilities, the ZNB26 suits RF component development, production test, and field service across amplifiers, filters, cables, connectors, and high-speed PCB designs.

Technical Specifications

• Frequency Range: 100 kHz to 26.5 GHz with 1 Hz resolution


• Ports: 2 or 4, 2.92 mm male connectors, 50 Ω impedance


• Dynamic Range: 140 dB base unit; up to 150 dB with options


• Trace Noise: Less than 0.004 dB RMS (10 kHz IF bandwidth)


• Output Power: +13 dBm maximum; adjustable over 95 dB range; extended option to −60 dBm (2-port)


• Power Sweep Range: 98 dB


• Measurement Bandwidth: 1 Hz to 10 MHz


• Sweep Time: 4 ms (401 points)


• Directivity: 42–46 dB


• Harmonics: −30 to −15 dBc


• Linearity: 1–2 dB


• Magnitude Stability: Below 0.01 dB/°C; phase below 0.15°/°C


• Supply: 100–240 V AC


• Operating Temperature: 5–40 °C


• Display: 12.1-inch WXGA LCD touchscreen, 18-bit color


• Weight: 16 kg

Key Features

• Optional second internal generator for frequency conversion and active device characterization


• Embedding/de-embedding for fixture removal


• Mixed-mode S-parameter support


• RFFE GPIO, GPIB, and handler I/O control interfaces


• Low long-term drift enabling multi-day operation without recalibration

Typical Applications

• Amplifier and mixer characterization


• Filter and connector analysis


• Cable measurements


• High-speed PCB design validation


• Production test and field service

Compatibility & Integration USB connectivity with optional external component control via RFFE GPIO, GPIB, and handler I/O interfaces.