Meaning
Regulatory guidance issued by the Federal Communications Commission outlines the permissible changes and modification categories for certified transmitter modules. Manufacturers consult kdb 178919 d01 to determine if an update to a wireless module’s antenna or shielding requires a new certification or can be handled as a permissive change. This document defines the boundaries between minor and major modifications.
Permissive Change
Under this guidance, changes are divided into Class I and Class II permissive changes based on their potential impact on radio frequency emissions. A Class I change does not degrade the RF performance and does not require a filing, whereas a Class II change requires the submission of test data to the regulator. This classification helps developers manage the cost of product updates.
Technical Boundary
Modifying the antenna type or increasing the gain beyond the original grant requires careful evaluation. The kdb 178919 d01 guidance states that substituting an antenna of a different type always requires a Class II permissive change and new radiated emissions testing. This ensures that the modified device remains within emission limits.
Filing Requirement
Following these guidelines prevents regulatory non-compliance and product recalls. This process ensures the legal status of the hardware.
