Novatel Wireless Inc.
Version 2.2
Page
14
of
20
6.0 Simultaneous RF Exposure Evaluation Guidelines
For Collocated Transmitters Allowable through a Class I
Permissive change
Collocated transmitters can be operated simultaneously with the E371 module in mobile
configurations, provided the technical parameters listed in KDB pub 447498 section 8 are met.
These procedures apply to antennas in the display screen for laptop devices.
6.1 Mobile Simultaneous Transmission guidelines
These parameters are:
a) Transmitters and modules certified for mobile or portable exposure conditions and
categorically excluded by § 2.1091(c) can be incorporated in mobile device notebooks
without further testing or certification when:
i.
The closest separation among all simultaneous (radiating) transmitting antennas
is
≥
20cm, or
ii. The antenna separation distance and MPE compliance boundary requirements
that enable all simultaneous transmitting antennas incorporated within the host to
comply with MPE limits are specified in the application filing of at least one of the
certified transmitters incorporated in the host device. In addition, when
transmitters certified for portable use are incorporated in a mobile device
notebook the antenna(s) must be
≥ 5 cm from all other simultaneous transmitting
antennas.
b) All transmitters in the final product must be at least 20cm from users and nearby persons.
6.2 Mobile Hosts calculations through power density calculations
This section can be used to select WWAN transmitters and antennas for use in Mobile device
configurations. Simultaneous transmitters must be selected to ensure that the compliance
evaluation will not result in issues with the WWAN transmitters or antennas.
The following tables provide guidance on maximum recommended gain and conducted powers of
WLAN transmitters.
Per OET 65, when RF sources have different frequencies, the fraction of the FCC power density
limit shall be determined and the sum of all fractional components shall be less than 1. The
fractional MPE calculation is also addressed in FCC KDB 616217 D03 (Simultaneous
Transmission Considerations).
