Narda 4741

The Narda 4741 is a precision step attenuator for RF and microwave test and measurement applications. It provides controlled attenuation from DC to 18.0 GHz with 1 dB increments across a 0 to 9 dB range. The device delivers ±0.5 dB accuracy at each step, exceptional temperature stability of 0.0001 dB/dB/°C, and resettability better than 0.05 dB per drum. With a 50 ohm characteristic impedance and maximum VSWR of 1.50, it integrates into RF systems requiring precise signal level control and impedance matching. SMA female connectors (MIL-STD-348 compliant) provide standard connectivity. The 4741 handles average power inputs up to 2 W or peak power to 0.2 kW at 0.0001 duty cycle, making it suitable for both continuous and pulsed signal applications.

– Technical Specifications

• Frequency Range: DC to 18.0 GHz
• Attenuation Range: 0 to 9 dB
• Step Size: 1 dB increments
• Attenuation Accuracy: ±0.5 dB (0 dB through 3 dB steps)
• Resettability per Drum: <0.05 dB
• Impedance: 50 ohms
• Maximum VSWR: 1.50
• Temperature Stability: 0.0001 dB/dB/°C
• Average Power Input: 2 W or 0.2 W maximum
• Peak Power Input: 0.2 kW (at 0.0001 duty cycle)
• Connectors: SMA female (input and output), MIL-STD-348 compliant

– Key Features

• Precision 1 dB step control across full attenuation range
• Extremely low temperature coefficient ensures stable operation across environmental extremes
• High repeatability minimizes drift between settings
• Compact panel-mount form factor (1.125 inches / 28.75 mm)
• DC-coupled operation for broadband signal handling

– Typical Applications

• RF and microwave system characterization
• Signal level calibration and control
• Impedance matching and network analysis
• Test and measurement setups requiring precise attenuation

– Compatibility & Integration

The 4741 integrates directly into 50 ohm RF systems via standard SMA female connectors. Design accommodates panel mounting with installation configuration details provided in technical documentation.