Syn-Tech III P25 Portable Radio
OPERATION MANUAL
680-090-2040
Version 5.0eng
http://www.midlandradio.com
5
3.2
Button and Key Functions
Below is a brief description of each button or key. For more details of each function
refer to the operation section of this manual. Many of the functions may be disabled by
radio programming or unavailable because of the current analog/digital mode selection.
Many of the buttons have a short press, or press and release function, and a long
press, or press and hold function. The short press is function is performed if the button
is pressed for less than one second, and the long press function is performed if the
button is pressed for more than one second.
3.2.1 Channel
Switch
The channel switch provides direct access to channels 1-15 in the current zone. In the
sixteenth position, the up/down and direct channel entry modes are available. If the
channel switch is in the sixteenth position, the radio will power on to last selected
channel. In any other position, the radio will power on to the switch-selected channel.
3.2.2
Emergency Call Button
The emergency button initiates emergency mode. The emergency function is only
available in digital mode. The emergency key must be pressed for five seconds to
activate the emergency function. Once emergency mode is activated, the radio will
switch to emergency channel and initiate five SBC emergency transmissions. The
emergency bit will be set on all user initiated digital transmissions until the emergency
is cleared by a long press of the keypad lock key or the radio is turned off.
3.2.3
Alpha-Numeric
keypad
The alpha-numeric keypad provides direct channel select from standby mode. The
alpha-numeric keypad also generates DTMF tones while PTT is pressed on analog
channels and enters alpha-numeric characters within other functions.
3.2.4
Up/Down keys
The up/down keys provide up/down channel select from standby mode. The up/down
keys are generally used to scroll through lists within other functions.
3.2.5
Left soft key (Menu)
The left soft key enters the menus from standby mode. The left soft key is generally
used as SELECT or OK within other functions.
