GME GA9800 Instruction Manual page 336

Up BUTTON
Pressing this button will increase the volume. In Menu mode this button is used
to adjust the mode setting.
DOWN BUTTON
Pressing this button will decrease the volume. In Menu mode this button is used
to adjust the mode setting.
MODe BUTTON
Press this button briefly to enter the Menu setting mode. Press again (repeatedly)
to step through the menus and select different setting options.
MONITOR/LAMp BUTTON
Press and hold this button for about 2 seconds to open or close the Squelch.
When the squelch is open and no signals are present a background hiss will be
heard. Press this button briefly to switch the backlight lamp on or off. The lamp
will stay alight for 5 seconds then will switch off automatically
DUpLeX BUTTON
Press this button to select Duplex mode on channels 1 ‑ 8.
Duplex operation allows the TX650 to transmit on a different frequency to that
which it receives. This allows operation through repeater stations in your area.
Repeaters automatically re‑transmit your signal over a much wider area,
providing greatly increased range. The Duplex mode only works on channels
1 ‑ 8. With Duplex selected, your TX650 actually transmits 30 channels higher
than it receives.
To activate the Duplex modes
Select a duplex channel (1 ‑ 8) then briefly press the DUp button. When Duplex
mode is selected, 'DUP' appears on the display on channels 1 ‑ 8.
TX6 5 0 IN STRUCT ION MA NUA L PAGE 7