AN1833 Freescale Semiconductor / Motorola, AN1833 Datasheet - Page 2

• Manufacturer Part Number: AN1833
• Description: A Low-Power Wireless Remote Control Transmitter and Receiver
• Manufacturer: Freescale Semiconductor / Motorola

Application Note
Application Overview
2
NOTE:
NOTE:
The OOK receiver and transmitter presented in this application note offer
greater range of operation and more robust data recovery due to
improved receiver sensitivity and the receiver’s ability to tune
automatically to the received carrier from the low-power crystal-
controlled transmitter. The transmitter has high-frequency stability and
low-harmonics power from unintentional radiators.
Throughout this document, numbers appearing in square brackets
([1], [2], etc.) refer to the information in References.
In the United States, the Federal Communications Commission (FCC)
has allocated the 260- to 470-MHz band for periodic part 15 operation.
The FCC regulations are found in the Code of Federal Regulations
(CFR), title 47, part 15 (paragraph 15.231).
It is strongly recommended that this document be reviewed before
pursuing an application in this band.
In the United States, most of the consumer applications are regulated
under part 15, which covers non-licensed intentional radiators. CFR title
47 [1] can be found at most libraries in the reference section or may be
obtained from the U.S. Government Printing Office or the Federal
Communications Commission’s Web site.
Periodic operation refers to the amount of time a system is active. A
manually operated transmitter will employ a switch that will deactivate
the transmitter automatically within five seconds. Likewise, a transmitter
that is activated automatically will cease transmission within five
seconds after activation. Periodic transmissions at regular intervals are
not allowed. However, polling to determine the integrity of the
transmitters used in security or safety applications is allowed if the
periodic rate of transmission does not exceed one transmission of more
than one second duration per hour for each transmitter in the system.
The field strength of emissions from intentional radiators from 260 to
470 MHz is limited to 12,500 microvolts per meter measured at three
Freescale Semiconductor, Inc.
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MOTOROLA
AN1833