I'm integrating a WiFi/Bluetooth module into a consumer product, however the module does not have a modular grant, will not have a modular grant, and is anyway getting paired with a unique internal antenna.
Per https://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id=50&tn=916170 (FCC publication 996369 Section 15.212), that means certification as an intentional radiator.
I have also read http://www.emcfastpass.com/rf-modules/ on the benefits of single-modular and limited single-modular certification.
The question is: if I must certify as an intentional radiator, how is the WiFi module cycled through testing modes? My testing lab says we must do low, and mid on each band, plus each modulation mode and speed, for each regulatory region. The permutations are huge:
- Two bands (2.4Ghz and 5Ghz)
- Eight protocols (802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, Bluetooth, BTLE)
- Six modulation techniques (FHSS DSSS OFDM HR-DSSS 256-QUAM CKM) at various data rates from 1 to 54 Mbps.
- Two channel pairings (20 Mhz, 40 Mhz)
- Three regulatory regions (US/Canada, Japan, Europe).
A few of the above are documented at http://www.intel.com/content/www/us/en/support/network-and-i-o/wireless-networking/000005725.html
Perhaps this is why I was quoted $50k and up for the testing, and 12 weeks, with 10 days of lab time at 8 hours of chamber time per day.
Is this really what's done? And how are those modes set anyway? I can imagine:
- Load special software into the Linux driver which runs through test modes. This requires cooperation with the chip vendor (internal chip is Broadcom BCM43341). However, this is not representative of the product in real use. The WiFi driver is not fully under my control, so running software from the module maker may be difficult or impossible.
- Have a trick Access Point, that can cycle through the modes. Each time have the product connect to the AP and stream data until the test data is collected.
The device pre-tests perfectly for unintentional radiation: passing with flying colors, even with an active AP co-resident in the chamber.
It's an IoT kind of device, so has no way to hook to a Windows PC for testing.