The Agilent/Keysight 495A is a traveling-wave tube (TWT) amplifier engineered for microwave testing and measurement across the 7 to 12.4 GHz band. This 50-ohm system delivers 1 W maximum output power into a 50-ohm load with 30 dB gain, supporting both continuous-wave and amplitude-modulated signals. Type N female connectors provide RF in/out connectivity. The unit integrates a DC-coupled modulation amplifier with 500 kHz bandwidth (3 dB) and accepts modulation inputs down to -20 V peak to achieve >20 dB output suppression. Housed in a compact 5.5″ × 16.75″ × 18.375″ chassis weighing 33 lbs, the 495A suits R&D, manufacturing, and field measurement environments where mid-range microwave amplification is required.
Technical Specifications
• Frequency Range: 7 GHz to 12.4 GHz
• Maximum Gain: 30 dB
• Maximum Output Power: 1 W (50-ohm load)
• Noise Figure: 20 dB
• Physical Dimensions: 5.5″ × 16.75″ × 18.375″
• Weight: 33 lbs
– Key Features
• Single-stage TWT design provides flat gain across the X-band spectrum
• 50-ohm matched input and output eliminate external tuning
• Integrated modulation path supports pulse and AM signaling to 500 kHz
• Direct modulation control via negative peak voltage
– Typical Applications
• Microwave component characterization and S-parameter measurement
• Radar and EW signal generation
• Amplification of low-level signals in lab and production test
• Developmental testing in the X-band region
– Compatibility & Integration
The 495A is part of a matched amplifier family including the 489A, 491C, and 493A models, all delivering minimum 1 watt output for 1 milliwatt input drive. Shared operating and service manuals are available for the 493A/495A pair.
