TruTrak KRT2 Comm Radio IR - Manual (Page 22)

In
the
lower
left
corner
of
the
display
the
carrier
modulation
is
dynamically
displayed.
It
corresponds
to
the
side
tone,
which
is
not
available
on
gliders
when
no
earphones
are
in
use.
In
order
to
avoid
the
blocking
of
the
frequency
by
unintentional
long
transmissions
(stuck
microphone)
the
transmitter
is
switched
off
after
two
minutes
and
the
display
changes
from
TX
to
Te.
To
resume
transmission
the
PPT
switch
first
must
be
released
and
then
be
pressed
again.
3.7
Self-­Test
Monitor
There
is
a
permanent
background
test
system
active.
The
field
for
battery
status
&
error
(see
Control
Elements
Overview)
is
used
to
indicate
warnings
and
in
case
of
hardware
failure,
different
error
reports.
The
warnings
are:
BAT
low
battery
voltage
(becomes
active
<
10,5V)
At
transmission
A-­‐match
bad
antenna
match
or
antenna
defective.
Also
while
transmission
the
TX-­‐flag
(top
left)
can
change
to
Te
Transmission
time
has
exceed
(>
2
minutes)
All
other
reports
starting
with
Er….
Indicating
a
major
hardware
failure
and
consequently
the
radio
has
to
be
returned
to
factory.
3.7.1
Optical
Side
Tone
Especially
on
glider
use,
where
no
headset
is
present
to
get
the
side
tone,
it
is
very
helpful
to
see
the
microphone
working.
At
lower
left
side,
there
is
a
modulation
indicator
showing
that
there
is
speaking
activity
while
transmitting.
When
there
is
no
speaking,
it
becomes
a
small
dot
approximately
in
the
center.
It
also
indicates
a
bad
antenna
match
by
getting
far
out
of
the
center.