The Rohde & Schwarz ZNL20 is a 2-port vector network analyzer spanning 5 kHz to 20 GHz, engineered for precision S-parameter measurement and signal characterization in development, production, and field service. This benchtop instrument combines VNA, spectrum analyzer, and power meter capabilities in a single Windows 10–based platform, delivering dynamic range exceeding 120 dB (typically >130 dB) with trace noise typically below 0.001 dB. The ZNL20 measures S-parameters, impedance (Z), admittance (Y), stability factors, and wave ratios with 1 Hz frequency resolution and 0.01 dB amplitude resolution across a configurable IF bandwidth of 1 Hz to 500 kHz.
– Technical Specifications
Frequency Range: 5 kHz to 20 GHz
Ports: 2-port configuration with 3.5 mm male connectors
Dynamic Range: >120 dB (specified); typically >130 dB
Trace Noise: Typically <0.001 dB; <0.0005 dB at 10 kHz IFBW; <0.0025 dB at 10 kHz IFBW
Output Power: 0 dBm (specified); typically +3 dBm; range –40 dBm to +3 dBm
Maximum Input Level: +15 dBm
Sensitivity: –60 dBm
Noise Floor: –140 dBm/Hz (typical)
IF Bandwidth: 1 Hz to 500 kHz
Frequency Resolution: 1 Hz
Amplitude Resolution: 0.01 dB
Display: 10.1" WXGA color LCD, capacitive touchscreen with multi-touch
Physical: 408 × 186 × 235 mm; 6–8 kg
Interfaces: USB host/device, LAN (RJ-45), GPIB
Operating System: Windows 10
– Key Features
• Dual-port TOSM calibration with sweep times as low as 2.5 ms (201 points via HiSLIP over 1 Gbit/s LAN)
• S-parameter, impedance, admittance, and stability factor measurements
• Integrated I/Q analyzer for digital and analog signal demodulation
• Optional time-domain analysis via R&S ZNL-K2
• Optional spectrum analyzer functionality (integrated to 6 GHz; software support to 26.5 GHz)
• Optional power meter support for external sensors (R&S NRP series) up to 6 GHz
• MultiView simultaneous display of multiple measurement modes
• CW signal generator option available
– Typical Applications
Component characterization, impedance matching networks, cable and antenna analysis, signal integrity verification, filter and amplifier testing, and field service diagnostics across microwave and millimeter-wave frequencies.
– Compatibility & Integration
GPIB, LAN, and USB interfaces enable integration with automated test systems. External power sensors and signal generation options extend measurement capability beyond the base instrument.
