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Turn power to the radio OFF before connecting or disconnecting any cables, including
the data cable. Also, turn power to the radio OFF when docking or undocking a
connected laptop computer. Failure to turn the power OFF can damage the radio,
requiring service by a M/A-COM approved service center.
9.14.1 Displays The following will be displayed on the control unit during the various states of data mode of operation.
TX DATA Displayed on bottom line of display when the radio is transmitting a data call.
RX DATA Displayed on bottom line of display when the radio is receiving a data call.
DATA OFF Displayed on top line of display when the radio is in the data disabled state.
DATA ON Displayed for two seconds on top line of display when the radio is toggled to the data
enabled state.
9.14.2 DATA OFF Operation The radio can be placed in the data disable state by any of the following methods. When the data state is
disabled, the control unit displays "DATA OFF" on the top line. An ongoing data call is allowed to
complete except when an emergency is declared.
• Removing the microphone from the hookswitch (hookswitch option must be enabled by pre-
programming).
• Declaring an emergency (not to be used unless an actual emergency condition exists). Alert tone will
sound.
• Pressing the OPT button (System Model) or OPTION (Scan Model) (pre-programmed). Alert tone
will sound.
• Selecting the function using the MENU button (pre-programmed).
9.14.3 DATA ON Operation The data state is enabled by one of the following (depending on how it was disabled). “DATA ON” will
be displayed top line of display for 2 seconds then the display returns to normal.
• Replacing the microphone into the hookswitch (going on-hook). Only valid if the “DATA OFF”
operation was entered by removing the microphone from the hookswitch (going off-hook).
• Clearing an emergency, but valid only if an emergency caused “DATA OFF” operation.
9.14.4 Exiting Data Calls Under normal conditions, the radio enters the scan lockout mode and returns to the control channel after
completion of a data call (transmit or receive). If, during a data call, one of the following conditions
occurs, the data call is immediately terminated and the radio performs the desired function:
• The PTT is activated.
• The PTT is in Public Address mode.
• An emergency is declared by pressing the pre-programmed emergency button.
• A group or system change is made.