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Smart Communications Ltd SC980A User Manual

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H (HOME) KEY 
In the conventional and LTR® trunking system, it returns the radio working system to the 
programmed HOME system and group. 
 
S (SCAN) KEY 
Pressing this key for longer than 2 seconds changes the radio operation between the 
conventional / LTR® trunking system.   
In the conventional and LTR® trunking system, the S (scan) key initiates scanning and is 
used for storing channels in scan memory. 
 
DOWN (F1) KEY 
In the conventional and LTR® trunking system, when the SYSTEM/GROUP control is set to 
the “F” position, pressing this key decreases the Group number, or decreases the System 
number in the shift mode. 
 
UP (F2) KEY 
In the conventional and LTR® trunking system, when the SYSTEM/GROUP control is set to 
the “F” position, pressing this key increases the Group number, or increases the System 
number in the shift mode. 
 
PTT SWITCH 
Enables transmit mode. 
 
SHIFT KEY 
Enables or disables the SHIFT mode. Pressing this key for the longer than 2seconds will 
enable or disable keypad operation. 
 
16 KEY (DTMF Microphone use only) 
Press the keys on the 16 keypad to make DTMF calls or to activate programmable 
functions.