2. LCAT1000-12 Substitution Conclusion The LCAT1000-12 is a direct functional substitute for the original FMAT1014 part based on its nominal key parameters. Both units are identical in core specifications, including attenuation value, frequency range, power handling, and interface. The main difference is the manufacturer (L-com replacing Fairview Microwave). For standard applications at or below 6 GHz, they are essentially interchangeable in terms of electrical performance and mechanical compatibility. It is important to note that unlisted minor performance variations may exist between brands, such as in VSWR or temperature stability. For mission-critical system applications, verifying the specific performance curves is recommended.