Revision 12.2
Jan. 2016
31 / 61
3.6.3 Optical side tone
Especially when used in gliders, where headsets are generally not worn
and thus no side tone is heard, it is very helpful to see if the microphone is
working. The KRT 2 solves this problem.
At left lower side, there is a modulation indicator that depicts the voice
level. When there is no modulation it becomes a small dot approximately in
the centre.
Also if it far off centre, it indicates that there is bad antenna matching.
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