Agilent / Keysight 8347A RF Amplifier, 100 kHz to 3 GHz

The Keysight 8347A is a broadband RF amplifier engineered for instrumentation and test applications across 100 kHz to 3 GHz. It delivers minimum gain of 25 dB with leveled output power spanning +2 dBm to +20 dBm, addressing signal losses in network analysis, receiver characterization, and high-power device drive scenarios. An internal leveling loop (ALC) reduces mismatch effects and maintains output flatness within ±1.5 dB across the operating band, enabling repeatable measurements in demanding test environments.

Technical Specifications

• Frequency range: 100 kHz to 3 GHz


• Gain: ≥25 dB (typical, 20–30°C)


• Maximum leveled output power: ≥+20 dBm


• Output leveling range (>300 kHz): +2 dBm to +20 dBm


• 1 dB compression point: +22 dBm (nominal)


• Third-order intercept: +30 dBm (nominal)


• Power flatness (internally-leveled, ±300 kHz): ±1.5 dB Distortion & Noise


• Harmonic distortion at +20 dBm (ALC Off): ≤–25 dBc


• Harmonic distortion at +20 dBm (ALC On): ≤–20 dBc


• Noise figure (10 MHz to 3 GHz): <15 dB (typical)


• Noise figure (below 10 MHz): <20 dB (typical) Impedance & Return Loss


• RF impedance: 50 ohms nominal


• Input VSWR: 60 dB (typical) Input & Power


• Maximum input for minimum internally-leveled output: –14 dBm


• Maximum continuous input power: +27 dBm


• AC supply: 100, 120, 200, or 240 V (±10%), 50–400 Hz


• Power consumption: 45 VA maximum

Key Features

• Type N female RF connectors (input and output)


• Internal automatic level control for output power stabilization


• Compact benchtop form factor: 213 mm W × 102 mm H × 297–298 mm D


• Net weight: 3.5–4 kg; shipping weight: 5 kg

Typical Applications

• Network analyzer drive and receiver enhancement


• Low-level signal amplification in receiver front-end testing


• High-power device characterization and validation


• Wideband instrumentation requiring flat gain across multiple octaves

Compatibility & Integration Standard 50-ohm interface with Type N connectors supports integration into existing RF test systems. Leveled output accommodates mismatched loads while maintaining measurement accuracy.