5
GP300 Portable Radios
Controls, Switches, Indicators and Connectors
Push-To-Talk (PTT) Button
When depressed and held, engages the transmitter and
puts radio in the transmit mode. When released, the radio
operates in the receive mode.
Monitor Button (PL/DPL Disable)
Selects the mode of operation, carrier squelch (CSQ) or
Private-Line/Digital Private-Line (PL/DPL squelch).
Control Button
When depressed, this monitors
the channel for any activity. Nei-
ther CSQ nor PL/DPL squelch is
active when monitoring. The
radio has the ability to monitor
all activity on the radio channel,
whenever this button is pressed.
This control button can also be
programmed for nuisance chan-
nel delete on radio models with
the channel scan feature.
Antenna
Heliflex (VHF models) or a Flexible Whip (UHF models) with
threaded base.
Monitor
Button
PTT Button
Control
Button
Flexible Whip
Heliflex
GP300_owners.book Page 5 Thursday, August 7, 1997 9:49 AM