Frs Limitations - Garmin Rino 520 Owner's Manual

Channel scan allows your FRS radio to scan all FRS
frequencies for signals. After scanning briefly to see what
channels other users are on, set your FRS radios to an
unused channel and enjoy less interference. For greater
privacy, some FRS radios have a voice scramble feature.
This feature causes your message to sound garbled to
other FRS users that are not part of your group. However,
it does not guarantee your conversations will be 100
percent private and secure. Other casual FRS users will
not hear your messages, but users with similar radios or
more technically-oriented users can still monitor your
conversations.

FRS Limitations

If you are operating in an urban environment or in
varying terrain, some features (such as canyons or
mountains) act as obstructions limiting the maximum
reception range of your FRS radio. The UHF FRS
frequencies are "line of sight", meaning that the signals
do not follow the surface of the earth, but instead radiate
in a straight line from the transmitting antenna. If there
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is an obstruction between the transmitting FRS radio and
the receiving FRS radio, the signal will not be received.
Smaller obstructions, such as trees, cars and even crowds
of people cause some loss of signal, resulting in reduced
maximum range.
GMRS Radio
The use of a GMRS (General Mobile Radio Service)
radio requires an FCC license (refer to the Web site
http://www.wireless.fcc.gov/uls/ for details.) No license
is required in Canada to operate on GMRS channels. The
operating frequency of GMRS ranges from 462.550 to
462.725 MHz. GMRS radios can use repeater channels
(15R–22R) and repeater towers to extend the range of
the operation. A repeater tower simultaneously receives
GMRS signals on a 467 MHz frequency and then
rebroadcasts the signal on a 462 MHz frequency. Refer
to the "Frequency Charts" for a complete list of each
channel's frequency. GMRS repeater channels are not
approved for use by the Canadian government, so they
are disabled on Rino 520/530 units sold in Canada.
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