Managing Dual Band Radio Laboratory Testing under Chinese Regulatory Frameworks
SRRC approval for dual-band radios demands locked firmware power tables, local agent coordination, and strict host radiated spur compliance to avoid re-test delays.
Antenna Gain Inheritance
Meaning
Hardware certification procedures allow a new wireless device to reuse the radio frequency test reports of an existing modular transmitter under specific conditions. When the new system utilizes an antenna with equal or lower peak gain than the originally certified antenna, antenna gain inheritance permits the reuse of the transmitter’s fcc or ce certification data. This reduces the requirement for redundant radiated emissions testing during system integration.
Technical Foundation
Regulatory authorities establish limits on equivalent isotropically radiated power to prevent interference with other spectrum users. If the replacement antenna has a peak gain that does not exceed the certified value, the radiated power limits are guaranteed to remain within the approved boundaries. This comparison must be made across all operating frequency bands of the transceiver to ensure that the system does not exceed the maximum allowed limits in any channel.
Compliance Path
System integrators must document the electrical specifications of both the original reference antenna and the new antenna. Standard datasheets or laboratory measurements must verify that the peak gain is lower or equal to the reference value. This documentation becomes part of the technical file submitted to the conformity assessment body.
Testing Relief
Partial evaluations of the assembled product remain necessary to ensure that the surrounding housing does not alter the radiation pattern. Integrators perform spot checks to confirm regulatory compliance.