Operating Manual

2-2 5100 ES Models II/III Portable Radio Operating Manual March 2008
Controls and Display
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 4.3), 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.
DTMF Keypad - The full keypad DTMF models include the 12 keys required to dial
telephone and unit ID numbers.
Speaker - The radio speaker is located near the bottom of the front panel. When a speaker/
microphone is used, it is automatically detected when the Opt Sel 1 line of the accessory
connector is pulled low. The logic then automatically disables the internal speaker.