Agilent/Keysight 11930B

The Keysight 11930B is a power limiter that protects RF and microwave instrumentation from over-power conditions and transients. Operating across 5 MHz to 6.5 GHz, it maintains linear performance at low input levels while clamping excessive power at a 30 dBm threshold. The device handles up to 3 W continuous or 6 W pulsed input (30 ms pulse width, 10% duty cycle) and supports DC levels to 30 V at 350 mA. With 50 Ω impedance and Type-N connectors, insertion loss ranges from 1.0 dB (16 MHz to 3 GHz) to 1.5 dB (3 GHz to 6.5 GHz), while return loss is 21 dB and 17 dB across those same bands respectively. The limiter fails to either an open circuit or short to ground, providing fail-safe protection for connected test equipment. Specifications are warranted from 0 to 55 °C.

– Technical Specifications

• Frequency Range: 5 MHz to 6.5 GHz
• Impedance: 50 Ω nominal
• Connector Type: Type-N
• Limiting Threshold: 30 dBm (typical)
• Insertion Loss: 1.0 dB (16 MHz to 3 GHz); 1.5 dB (3 GHz to 6.5 GHz)
• Return Loss: 21 dB (16 MHz to 3 GHz); 17 dB (3 GHz to 6.5 GHz)
• Maximum Continuous Input Power: 3 W
• Maximum Pulsed Input Power: 6 W (30 ms pulse, 10% duty cycle)
• DC Voltage Rating: 30 V maximum
• DC Current Rating: 350 mA maximum
• Weight: 30 g
• Operating Temperature Range: 0 to 55 °C

– Key Features

• Linear operation at low input levels preserves signal integrity below threshold
• Fail-safe design—opens or shorts to ground to protect downstream equipment
• Broadband performance from microwave to low GHz frequencies
• Dual-mode rating supports both continuous and short-duration pulse exposure

– Typical Applications

• Spectrum analyzer input protection
• Signal source output safeguarding
• RF and microwave receiver input stages
• High-power transient suppression in automated test systems

– Compatibility & Integration

• Keysight Microwave & RF Test Systems
• Any 50 Ω RF instrumentation with Type-N ports