OTHER FEATURES

be disabled. To disable all keys except push-to-talk and backlight, turn power on with the LCK key pressed. If a key is then pressed, all that happens is that “KEYLOCK” is displayed. To re-enable the keypad, simply turn power on again with the LCK key pressed.

Key Press Tone Disable

If the tone that sounds when a key is pressed is distracting or annoying, it can be disabled. To enable or disable this tone, turn power on with the SCN key pressed. When the key press tone is disabled, “MUTE” is displayed.

High/Low Power Select

Some transceivers have selectable high and low power output (your system operator will tell you if yours does). If your transceiver has this feature, power output is changed by turning power on with the RTN key pressed. Either HI PWR or LOW PWR is then flashed in the display to indicate which power setting is currently selected. The low power setting may increase battery life but decrease range. The opposite may occur with the high power setting. If your transceiver does not have selectable power output, this information is still indicated even though no power change occurs.

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EFJohnson 8500 manual Key Press Tone Disable, High/Low Power Select