E F Johnson Company 2424140 Benutzerhandbuch

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Microphone - The microphone is located behind the 
small opening shown in Figure 2-1. For best results, 
hold the radio 2-3 inches from you mouth and speak at 
a normal conversational level. Do not shout since it 
distorts your voice and does not increase range.

Display - This is a graphical LCD (Liquid Crystal 
Display). The display backlight can be programmed to 
turn on when any key is pressed or when the Backlight 
option switch is pressed or menu parameter selected 
(see Section 3.5). 

Up/Down Switch - Selects zones when multiple zones 
are programmed (see Section 3.3). Pressing the upper 
part of the switch selects the next higher number and 
pressing the lower part selects the next lower number. 
This control also provides up/down select in the menu 
mode and in other modes when up/down select is 
required. 

F1 - In menu mode (see Section 4.2), functions as a 
step back and exit switch. If menu mode is not used, it 
is a programmable option switch.

F2 - Selects the menu mode when that mode is 
enabled by programming. Also functions as an Enter 
or Select switch in the menu and other modes. If menu 
mode is not used, it is a programmable option switch. 

F3, F4 - Programmable option switches.