Rohde and Schwarz ZN-B13 Broadband Limiter, 30 – 6000 MHz, 50 OHM

The Rohde & Schwarz ZN-B13 is a broadband limiter designed to protect sensitive RF and microwave equipment from excessive signal power across 30 MHz to 6000 MHz. Operating at 50 Ohm impedance with N-type connectors, it attenuates high-power input signals to prevent damage to receivers, amplifiers, and other critical components. The ZN-B13 handles continuous wave input up to 2.5 W and limits power levels within the +12 dBm to +33 dBm range, making it essential for RF test benches and measurement systems where signal levels vary unpredictably.

– Technical Specifications

• Frequency Range: 30 MHz to 6000 MHz
• Impedance: 50 Ohms
• Maximum RF Input Power: 2.5 W CW
• Limiting Power Range: +12 dBm to +33 dBm
• Input Connector: N-type female
• Output Connector: N-type male
• Weight: 22 lbs
• Dimensions: 22 × 20 × 16 inches

– Key Features

• Broad frequency coverage from 30 MHz through 6 GHz
• Fixed 50 Ohm characteristic impedance for standard RF systems
• Continuous wave rated to 2.5 W input power
• Configurable limiting threshold between +12 dBm and +33 dBm
• Standard N-type RF connectors for field deployment

– Typical Applications

The ZN-B13 protects sensitive receiver front-ends and low-noise amplifiers in RF measurement environments. It is commonly deployed in test systems where transmitter power, reflected signals, or external interference could otherwise damage equipment. Applications include receiver protection during antenna tuning, amplifier safeguarding in variable-power test setups, and system reliability assurance in dynamic RF environments.

– Compatibility & Integration

Designed for integration into standard 50 Ohm RF systems. The N-type connectors and 30 MHz to 6 GHz frequency range enable interoperability with most RF test instruments, signal sources, and measurement devices operating in this impedance class.