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Using the IEUTK 
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This Interactive End User Toolkit (IEUTK) covers the basic operation of the APX 8500 E5 Control Head. 
However, your dealer or system administrator may have customized your radio for your specific needs. Check 
with your dealer or system administrator for more information. 
Throughout the text in this toolkit, you will notice the use of WARNING, CAUTION, and Note.  
These notations are used to emphasize that safety hazards exist, and the care that must be taken or 
observed. 
 
Icon  Description 
WARNING: An operational procedure, practice, or condition and so on, which may result in 
injury or death if not carefully observed. 
CAUTION: An operational procedure, practice, or condition and so on, which may result in 
damage to the equipment if not carefully observed. 
Note:  An operational procedure, practice, or condition, and so on, which is essential to emphasize.