The Narda 4242 is a coaxial directional coupler series engineered for precision signal sampling across 500 MHz to 2 GHz. These couplers extract a defined portion of signal power for monitoring and analysis while maintaining signal integrity in the primary transmission path. Available in 6 dB, 10 dB, and 20 dB coupling configurations, the 4242 delivers consistent performance across demanding RF and microwave test environments.
Technical Specifications
Frequency Range: 500 MHz to 2 GHz
Coupling Values: 6 dB, 10 dB, and 20 dB models available
Directivity: 22 dB minimum (all models)
Insertion Loss:
• 4242-10 dB: 0.35 dB (coupled power excluded), 0.90 dB (true insertion loss)
• 4242-20 dB: 0.35 to 0.40 dB
Frequency Sensitivity: ±0.5 dB maximum
Coupling Accuracy:
• 4242-6 dB and 4242-10 dB: ±1.0 dB maximum deviation from nominal
• 4242-20 dB: ±1 dB variation
VSWR: 1.20:1 maximum (primary and secondary lines)
Power Handling:
• Average: 50 W
• Peak (4242-10 dB): 3 kW
Connector: SMA Female
Weight:
• 4242-10 dB: 71 g maximum
• 4242-20 dB: 80 g
– Key Features
• Minimal insertion loss maintains signal fidelity in primary transmission path
• Flat frequency response with ±0.5 dB sensitivity across operating band
• High directivity at 22 dB ensures accurate coupled signal extraction
• Low VSWR preserves impedance matching on both ports
• High power rating supports both continuous (50 W) and pulsed (3 kW peak) operation
– Typical Applications
• RF and microwave test and measurement
• Telecommunications signal monitoring
• Aerospace systems integration and validation
• Power measurement and directional analysis
– Compatibility & Integration
SMA Female connectors enable direct integration with standard RF test equipment and instrumentation across 500 MHz to 2 GHz frequency band.
