User & Installation manual
VHF- Communication Transceiver
Doc.-Nr.:
DE-3000-800100e
KRT2, KRT2M, KRT2RC
Revision 13.0
Jul. 2016
28 / 67
Menus L and R:
By means of the turning knob the displayed microphone input channel
amplifier gain (MIC-level 01 = low gain, 09 =high gain) can be selected
individually. The microphone signal level is dynamically displayed with a
bar and a numeric value from 0.0 to 1.0).
The initial MIC-level should be 5; the engine should be running, use a
headset or earphone and speak at a normal voice level to fine-tune the
MIC-level. Whenever a new MIC level is selected, the dynamic bar
indicator should then be at about 50%.
Special hint: During MIC-Setup activation, the speaker state will be taken into account
(SQU on/off), if the state is active an acoustic feet-back may be heard.
The range of the MIC-level for standard microphones is 1 to 9.
MIC levels 10 and 11 are special settings for low microphone levels like
dynamic micro-phones often used in gliders.
Level 10 is used for non-amplified Electret microphones with an 8 volt
supply voltage.
Level 11 is for dynamic microphones only.
For high gain selection (> 9) the use of side tone can lead to a feed-back at
transmission. In that case the side tone should be set to SIT=01.
The new values will be stored upon exiting the microphone setup menu.
AUTO must be selected in order to activate the AUTO menu, else use L or
R to activate the Left and & Right microphone menu.