LCAT7438-3

Overview

The LCAT7438-3 is a fixed attenuator manufactured by L-com, designed for use in 75 Ohm impedance circuits. It provides a nominal attenuation of 3 dB and operates within a frequency range of 0 Hz to 4 GHz. The device handles a power rating of 2 Watts and features BNC connectors, specifically configured as a plug-to-jack in-line module. It exhibits a Voltage Standing Wave Ratio (VSWR) of 1.35:1, ensuring good performance for adjacent components.

Feature Summary

• Provides fixed 3 dB attenuation for signal level reduction
• Designed for 75 Ohm impedance circuit applications
• Operates effectively up to 4 GHz frequency range
• Features BNC in-line connector configuration

Applications

• RF signal chain attenuation
• Video distribution systems
• Broadcast equipment interfacing
• Test and measurement setups

Procurement Notes

Verify the specific part number suffix against official L-com documentation to confirm connector orientation and impedance specifications. Ensure compatibility with existing 75 Ohm infrastructure before integration. Cross-reference datasheet parameters such as VSWR and power handling against system requirements to prevent signal degradation or component failure during operation.

Selection Notes

Select this component when a precise 3 dB reduction is required in a 75 Ohm environment. Consider the 2W power rating and 4 GHz bandwidth limits relative to the application's signal strength and frequency content. The BNC interface dictates physical connectivity constraints within the assembly.

Part Context

This model belongs to L-com's line of fixed attenuators, which are passive devices used to reduce signal amplitude without distortion. These components are essential for maintaining optimal signal levels in RF and video transmission paths, protecting sensitive downstream equipment from high-power signals while preserving waveform integrity across the specified frequency band.

Replacement Considerations

Direct substitutes include other 3 dB, 75 Ohm, BNC fixed attenuators from various manufacturers. Verify that replacement units match the exact impedance, attenuation value, frequency range, and connector type to ensure seamless integration without requiring adapter modifications.