HP / Agilent 8495G Programmable Attenuator, 4 GHz, 70 dB, 10 dB steps

The HP/Agilent 8495G is a programmable RF attenuator for precise signal level control in test systems operating up to 4 GHz. Maximum attenuation reaches 70 dB in 10 dB discrete steps, with attenuation accuracy of ±0.5 dB (or 3% of setting) up to 40 dB, and ±1.5 dB (or 5%) above 40 dB. Insertion loss stays below 0.5 dB across its frequency range. The unit handles 3 Watts average power and 100 Watts peak power at 0.1% duty cycle with 1 µs pulse width.

– Technical Specifications

• Frequency Range: DC to 4 GHz
• Maximum Attenuation: 70 dB
• Attenuation Steps: 10 dB increments
• Impedance: 50 Ohms nominal
• Insertion Loss: Less than 0.5 dB (DC to 4 GHz)
• VSWR: 1.5:1 at 1 GHz; 1.8:1 at 4 GHz
• Attenuation Accuracy: ±0.5 dB or 3% of setting (≤40 dB); ±1.5 dB or 5% of setting (>40 dB)
• Power Handling: 3 Watts average; 100 Watts peak (0.1% duty cycle, 1 µs pulse width)
• RF Connectors: Type N female (input and output)
• Control Connector: 24-pin male for remote control and power
• Control Interface: TTL/DTL compatible logic levels

– Key Features

• Discrete 10 dB step attenuation simplifies level control in automated systems
• Low insertion loss maintains signal fidelity across the DC to 4 GHz band
• High peak power rating accommodates pulsed RF applications
• Type N connectors and 50 Ohm impedance ensure integration with standard RF equipment
• TTL/DTL control interface enables direct connection to digital sequencers and ATE controllers

– Typical Applications

• Automated test equipment (ATE) signal conditioning
• RF/microwave system calibration and characterization
• Signal generation and power level management
• Production testing where repeatable attenuation is critical

– Compatibility & Integration

The 8495G integrates directly into 50 Ohm RF systems. Type N female connectors mate with standard RF test equipment and sources. TTL/DTL control levels allow straightforward interfacing with digital control systems, test sequencers, and programmable instruments without additional conditioning.