The Narda 4745 is a precision step attenuator engineered for signal level control across RF and microwave applications from DC to 18 GHz. This device delivers attenuation from 0 dB to 69 dB in 1 dB increments, enabling fine-grained adjustment for laboratory testing, system integration, and signal path management. Maximum average power handling is 2 W, with peak power capability of 0.2 kW at 0.0001 duty cycle.
Technical Specifications
Frequency Range: DC to 18 GHz
Attenuation Range & Resolution: 0 dB to 69 dB in 1 dB steps
Power Handling: 2 W average; 0.2 kW peak (0.0001 duty cycle)
Impedance: 50 Ohms
VSWR: 1.50 max (DC to 12.4 GHz); 1.65 max (12.4 to 18 GHz)
Temperature Stability: 0.0001 dB/dB/°C
Resettability per Drum: < 0.05 dB
Insertion Loss: Typically < 1 dB
RF Connector: SMA Female
– Key Features
• Attenuation accuracy ±0.5 dB (1–9 dB range), scaling to ±2.0 dB at 60–69 dB steps
• Low insertion loss and exceptional temperature stability minimize measurement drift
• High reliability construction supports laboratory and field deployment
• Optional removable rack mount ears (R configuration) for integrated system installations
– Typical Applications
• Signal attenuation and leveling
• Impedance matching and signal path management
• Protection of sensitive equipment from high power levels
• Telecommunications and radar system integration
• Test and measurement environments requiring precise, repeatable control
– Compatibility & Integration
SMA female connectors provide standard 50 Ohm RF interconnection. The model 4745-69 designation reflects the full 69 dB attenuation range. Precision construction ensures consistent performance across diverse operational environments.
