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User & Installation manual
VHF- Communication Transceiver
Doc.-Nr.:
DE-3000-800100e
KRT2, KRT2M, KRT2RC
Revision 13.0
Jul. 2016
25 / 67
Deactivation of the intercom is done with an opened external microphone
button (Ground connection to pin 12), this is indicated with an “e” on the
display.
This mode only works with a deactivated external audio input (see
– External Audio Input Volume”).
In gliders the VOX has to be set to 10 in order to disable the speaker
control.
4.4.5 TXm
– PTT Switch Selection
Pressing the AUD button three times enables the turning knob to enable
certain PTT switches.
On transmission the microphone which is related to the PTT-L/R will be
enabled. The equivalent indication is TX or TX1 / TX2.
On transmission the PTT-L/R related microphone will be the only one
activated.
TXm**
*
- Left / -
*
Right /
**
Both
4.4.6
INT
– Intercom Volume
Pressing the AUD button four times enables the turning knob to set the
intercom volume.
INTnn
Range: 1
– 9
4.4.7 EXT
– External Audio Input Volume
Pressing the AUD button five times enables the turning knob to set the
external audio input volume. External audio inputs can be audio alarms,
voice alarms, Vario, etc. The required level is 200mVpp (6Vpp max).
Activation occurs for settings >00 and will be indicated by the flag “a”.
00 = turning off,
01 = lowest gain without threshold
09 = highest gain with interference suppression threshold.
EXTnn
Range: 0 - 9