Radio Shack TRC-511 owner manual Maximum Range, Code Meaning

21-1705.fm Page 11 Thursday, September 7, 2000 10:41 AM

This table lists codes adopted by the Associ- ated Public Safety Communications Officers (APCO).

Code	Meaning
10-1	Your signal is bad.
10-2	Your signal is good.
10-3	Stop transmitting.
10-4	Message received and under-
	stood.
10-5	Relay information to _____.
10-6	I am busy or are you busy?
10-7	Out of service.
10-8	In service.
10-9	Repeat last message.
10-10	Negative (NO).
10-11	_____ in service.
10-12	Stand by.
10-13	Report road/weather condi-
	tions.
10-14	Information.
10-15	Message delivered.
10-16	Reply to message.
10-17	En route.
10-18	Urgent.
10-19	Contact _____.
10-20	What is your location?
10-21	Call _____ by telephone.
10-22	Cancel last message.
10-23	Arrived at the scene.

Code	Meaning
10-24	Assignment complete.
10-25	Meet _____.
10-26	Estimated time of arrival is
	_____.
10-30	Use caution.
10-31	Pick up.
10-33	Emergency traffic. Clear the
	channel.
10-34	What time is it?
10-41	Switch to Channel xx.
10-62	Cannot understand.

Note: Although this table lists the 10-codes’ meanings in the form of a statement, they can also be phrased as questions (10-6: Are you busy?, 10-20: What is your location?).

MAXIMUM RANGE

The maximum range and quality of CB radio transmissions vary depending on the follow- ing conditions:

•the type and quality of antenna used

•the height of the antenna’s mounting location — the higher the antenna, the better the signal’s range

•the surrounding terrain — mountains and tall buildings limit the range

•weather conditions

•the number of nearby radios operating on the same channel

•standing wave ratio (SWR) between the antenna and the CB

Operational Hints 11