User's Manual

MRF89XAM9A
DS00000A-page 18 Preliminary © 2011 Microchip Technology Inc.
3.1.1.2 OOK Modulation
The following settings configure the MRF89XAM9A for
narrowband operation that conform to the requirements
of Part 15.249. Part 15.249 requires a much lower
power setting than is allowed in Part 15.247. These set-
tings are good for applications that require lower trans-
mit power current consumption and shorter transmit
distances:
• Transmit Power Maximum Setting:1 dBm
• Bit Rate Maximum Setting: 16 kbps
• Frequency Deviation Setting: 200 kHz
• Transmit Bandwidth Setting: 400 kHz
• Lower Frequency Setting: 902.330 MHz
• Upper Frequency Setting: 927.500 MHz
3.1.2 RF EXPOSURE
All transmitters regulated by FCC must comply with RF
exposure requirements. OET Bulletin 65 “Evaluating
Compliance with FCC Guidelines for Human Exposure
to Radio Frequency Electromagnetic Fields” provides
assistance in determining whether proposed or existing
transmitting facilities, operations or devices comply
with limits for human exposure to RF fields adopted by
the Federal Communications Commission (FCC). The
bulletin offers guidelines and suggestions for
evaluating compliance.
If appropriate, compliance with exposure guidelines for
mobile and unlicensed devices can be accomplished
by the use of warning labels and by providing users
with information concerning minimum separation
distances from transmitting structures and proper
installation of antennas.
The following statement must be included as a
CAUTION statement in manuals and OEM products to
alert users of FCC RF Exposure compliance:
If the MRF89XAM9A module is used in a portable
application (antenna is less than 20 cm from persons
during operation), the integrator is responsible for
performing Specific Absorption Rate (SAR) testing in
accordance with FCC rules 2.1091.
3.1.3 HELPFUL WEB SITES
Federal Communications Commission (FCC) http://
www.fcc.gov
To satisfy FCC RF Exposure requirements for mobile
and base station transmission devices, a separation
distance of 20 cm or more should be maintained
between the antenna of this device and persons
during operation. To ensure compliance, operation at
closer than this distance is not recommended.
The antenna(s) used for this transmitter must not be
co-located or operating in conjunction with any other
antenna or transmitter.