1. LCAT1002-07 Substitution Conclusion The LCAT1002-07 can only substitute for the original part LCAT1006-07 under the condition that the system operating frequency does not exceed 3GHz; otherwise, substitution is not permissible. The core difference between the two parts lies in their frequency range: the LCAT1006-07 supports an ultra-wide bandwidth from DC to 18GHz, whereas the LCAT1002-07 is limited to DC to 3GHz. Within the 3GHz to 18GHz frequency interval, key performance parameters of the LCAT1002-07—such as attenuation accuracy, impedance matching (VSWR), and power handling capability—cannot be guaranteed. This may lead to system signal distortion, increased reflection, or even component damage. If the application involves frequency bands above 3GHz (e.g., satellite communications, 5G millimeter-wave fronthaul, or high-end test and measurement), the Original Part must be used. Substitution is only acceptable when the application is strictly confined to frequencies below 3GHz, such as in most consumer wireless systems or low-frequency RF units.