2. FMAT7620-20 Substitution Conclusion Electrically and parametrically feasible, but a supplier transition assessment is required. The FMAT7620-20 provides a complete match to the original LCAT1000-20 in all critical performance specifications (20dB attenuation, 2W power handling, 50-ohm impedance, 0-18GHz frequency range) and physical interface (SMA In-Line Module). Its extended 18 GHz frequency range meets and exceeds the original application's technical demands. The key difference is the manufacturer change from L-com to Fairview Microwave. While direct electrical and mechanical substitution is possible, attention must be paid to potential subtle variances between brands, such as attenuation accuracy, temperature stability, and VSWR performance curves, as well as changes in the supply chain and quality certification systems. On-board verification is recommended prior to formal, volume substitution.