Prior to 2013, the Wi-Fi airwaves were getting clogged in China as the 5GHz band was confined to 5725-5850 MHz. To solve this issue, China opened up the 5GHz band to add the 5150-5350 MHz frequencies to create more breathing space and a less congested Wi-Fi environment. Some of the changes are as follows:

• Increased the number of 20 MHz channels from 5 to 13
• Increased the number of 40 MHz channels from 2 to 6
• Maximum power output is 200 mW EIRP
• Maximum PSD (Power Spectral Density): 10 dBm/MHz (EIRP)
• Out-of-band emission: -80 dBm/Hz (EIRP)
• 5250 to 5350 MHz band is subject to Dynamic Frequency Selection (DFS) and Transmit Power Control requirements

Wi-Fi Channels Summary:

• 2.4 GHz: Channels 1 – 13.

• 5 GHz:

Considerations when dealing with wireless regulations in China

China does not accept modular certification of 802.11 Wi-Fi radio modules.  System approval is required to obtain the China Compulsory Certification (CCC).  In addition, the radio must also obtain State Radio Regulation Committee (SRRC) Radio Type Approval, with in-country testing required.

China Safety Update

There is a new requirement for power supplies sold in China. China standard GB 4943.1-2011 went into effect December 01, 2012 and requires warning labels for power supplies that do not meet creepage clearance from the primary-to-secondary circuitry. This applies to units used above 2,000 meters due to sparking danger in higher altitudes where the air is thinner and less humid. This standard may become a worldwide standard in the future as most power supplies are manufactured in China.

If your system is not capable of running the various Wi-Fi radio tests, like continuous transmit, then in most cases it is possible to demonstrate compliance using a third-party development platform. Silex Technology can help with this radio testing. Please contact sales@silexamerica.com to obtain more information.