LCAT7438-20

Overview

The LCAT7438-20 is a fixed RF attenuator manufactured by L-com, designed for 75-ohm systems. It provides a nominal attenuation of 20 dB with a maximum power handling capacity of 2 Watts continuous wave. The device operates within a frequency range from DC to 4 GHz and maintains a voltage standing wave ratio (VSWR) of less than 1.35:1. It features BNC connectors on both ends, specifically a male plug and a female jack, facilitating inline integration into coaxial circuits.

Feature Summary

• Provides precise signal reduction in 75-ohm transmission lines
• Supports high-frequency operation up to 4 GHz
• Features durable metallic construction with gold plating

Applications

• Broadcast video distribution networks
• Cable television infrastructure
• RF test and measurement setups requiring signal level adjustment

Procurement Notes

Verify the specific part number suffix against official L-com documentation to ensure correct impedance and connector configuration. Confirm that the 75-ohm specification aligns with your system requirements, as standard RF components often default to 50 ohms. Check datasheet revisions for any updates regarding operating temperature ranges or power derating curves before finalizing procurement specifications.

Selection Notes

Select this component when a 20 dB reduction is required in a 75-ohm environment. Ensure the application does not exceed the 2W power limit. Compare VSWR specifications against system tolerance levels to maintain signal integrity. Verify connector gender compatibility with existing cabling assemblies to avoid adapter usage.

Part Context

This model belongs to the LCAT7438 series of fixed attenuators from L-com. The series offers various attenuation values while maintaining consistent 75-ohm impedance and BNC connectivity. This specific variant focuses on higher attenuation levels suitable for significant signal loss applications within professional broadcast and communication systems.

Replacement Considerations

Compatible substitutes include other LCAT7438 series variants with different dB ratings if attenuation needs change. Cross-reference with other manufacturers' 75-ohm BNC fixed attenuators ensuring identical DC-4 GHz frequency response and 2W power handling capabilities.