Motorola TALKABOUT T5500 Communications Manual - Page 14
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out a tone that is so low in frequency that your ear can't hear it. It goes right along with
your regular transmission, so that ONLY if you have your radio set to that same tone's
number will you be able to hear the transmission. It is usually a small number in your
radio's LCD* display. A zero means that CTCSS is turned off.
DOUBLING: occurs when two stations transmit at the same time, which means that they
cannot hear each other.
EMERGENCY TRAFFIC: A message which relates to preventing injury, death or
property damage. If you need to use a radio channel to exchange this kind of
information say quickly between transmissions " your tactical call with
emergency traffic."
FCC (Federal Communications Commission): The federal government's agency in
charge of communications.
FREQUENCY: The FRS* and GMRS* channels are designations for "frequencies"
assigned by the FCC. "Frequencies" are (in technical terms) the number of cycles per
second of the transmitted radio wave.
FRS (Family Radio Service): An unlicensed Radio Service authorized for personal
communications by the FCC to operate using small two-way* hand held radios which
transmit with ½ watt or less in UHF* bands.
"FRS/GMRS*radio": The term used for any two-way* hand held radio that has both
FRS and GMRS* channels in the same radio.
GMRS (General Mobile Radio Service): A licensed personal Radio Service authorized
by the FCC to operate using two-way* hand held (up to) 5 watt* radios which share some
UHF* channels with the FRS and some others which are exclusive to the GMRS. See
item #2 under Radio Regulatoins (above).
HT ("handi-talky"): a small hand held two-way radio*. "HT" comes from the earlier
name of "handi-talky". They are similar to but smaller than the old "walki-talkys".
LCD (liquid crystal display): A small display screen on your FRS/GMRS radio with a
grey background and black numbers.
Modulation: The term used for the superimposing of voice on the radio waves used by
FRS/GMRS radios. "Overmodulaton" occurs when speech is too loud and the signal
becomes distorted and difficult to understand. "Undermodulation" is due to speaking
too softly or too far away from the microphone so that the received sound is too weak to
be understood.
For disaster communication in the ASNC area, tune to FRS Channel 2 (Alternate: Ch 12)
Ham Radio Operators should also tune to Battalion 2 simplex 145.585 MHz, PL 110.9
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