TC-508 Owner’s Manual
1
Instructional Icons
This radio is not intended for use by general population in an uncontrolled environment. It is only for
occupational use and only applied to work-related conditions.
The radio must be only used by users, who are fully aware of the hazards of the exposure and who are
able to exercise control over their RF exposure to qualify for the higher exposure limits.
The following icons are available through this manual:
Caution: indicates situations that could cause damage to your radio.
Note: indicates tips that can help you make better use of your radio.
Term Explanation
Please pay your attention to the following key terms:
Key Operation
Short press: to press a key and release it quickly.
Long press: to press and hold down a key for above 1 second.
Hold down: to press a key and remain holding it down.
User Mode
Refers to the mode entered after you turn on the radio directly.
CTCSS/CDCSS
The signaling can help you prevent unwanted conversations at the same frequency.