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I am inferring the frequency range (MHz) as the valid channel of operation for Wifi.
The information regarding the valid channels and target power is captured in the blob and nvram file.
The blob file is basically a collection of country codes/regions and the valid channels(with power target) for all channels in the regions.
Please refer the regulatory manual for details of the blob file. New Document Release: AN225347 - Cypress Wi-Fi CLM Regulatory Manual