Determines what signal that will be used as
the source for keying the transmitter.
Any combinations can be set
Mic: Local PTT input from a
microphone, where the PTT is
connected to pin 4 and 8(gnd) on
the Mic/headset connector.
Line: Keying from a phantom
signal on the line input. Pin 3 and 6
on the Rem/TR connector.
Txkey: The transmitter is keyed by
an external voltage on the
TXKEY_P and TXKEY_N input
pins. Signals located on Pin 7 and
8 on the | connector.
Txgnd: The transmitter is keyed by
a signal on the TX_KEY_G input
pin Signals are located on Pin 4
and 8 (gnd) on the REM/TR
connector.
Inband: The transmitter is keyed
using an inband tone (see also
inband frequency and inband
sensitivity)