Garmin SL40 - Mic Level Adjustment; Display Test; Mic Squelch; Transmit Mic

Installation
Mic Level Adjustment
Those units with
audio
board
pln415-7008-01,
or later,
have the
ability to ntake adjustments
to
microphone
sensitivity by
using
the Mtc
I LEvul
and
Mrc 2 Luvut
pages
in
the Test
Mode.
l.
Press
and
hold
the
<> and Rcl keys
while
switching the unit
on.
2.
Turn the Lnncs
knob to the
Mrc
I
Lsvur- and Mrc:
2Luvutpages.
3. Press
the e key to
start sclection (the
number will
t)ash).
4.
Turn
the Snlnll knob
to
change
the value. Press Mel,t
to store the
value.
-5.
Turn
the unit
ofTto exit the Test
Mocle.
Display
Test
It is
possible
to perform
a
sinrplc
test to observc all
scgnrcnts
of thc display for
a clr,rick
checkout
of thc
display functions.
l.
Press
and
hold
thc <+ and Rc:r-
kcys
whilc
switclring thc unit
on.
2.
Turn
thc
Lnnc;s
knob
to thc DISPLAY
T'EST pagc.
3. Press
Mt'nl
to
pcrform
thc
test.
A
serics of
"#"
syntbols will
advancc
across the
display
tcstirrg
each LBD.
4.
Turn thc unit
off to
exit the Tcst
Moclc.
Nlic
Squclch
Adjustrncnts
to
thc squclclr lcvcls
firr
Micl and Mic2 are
availablc in
thc
System
Functions
modc. To
adjLrst
the Micropltonc
Scluelch lcvcl:
l.
Prcss and hold
thc Mtllt
button
tbr irbout
two
seconcls.
This
will access
tlrc Systenr
l-
unctions ntode.
2. Rotate
thc LARGtT
knob to
display
thc Mrc I oH Mrc'2
Ser.cru
pagcs.
3. Rotate thc Sptnll
knob to
change
thc level nurnbcr.
Thc
rangc
of tlre
numbcr is 000
to
127.
4.
Press
any
kcy
to exit
thc Sctup Functions
modc.
-5.
Sclcct an appropr-iatc
l}equerrcy,
kcy
the transrnittcr,
anci
talk
into
the
microphone
to
chcck the level.
Transmit
Mic
Thc Transmit
Microphone page
allows you
to
control wliich microphone
is
permitted
to
trarrslnit.
You ntay
choosc Mic
I
.2.or
both.
To
adjust tltc J'ransnrit
Mic
control:
l.
Press
and
hold
thc
Motl
button
fbr about two seconds.
This will acccss
thc
Svstcn-r
Functions
nrodc
2.
Rotate
thc
laRc;c
knob
to
display
thc Trr.RNsrvlrl
Mrc pagc.
3. Rotate
the SHanll
knob to
sclcct
MIC I
,
MIC2,
or
MIC
l+MlC2.
4.
Prcss any key
to exit
the
Setup
Functions
modc.
5. Sclcct
an
appropriatc
fiequency,
key the transmitter.
and
talk into
tlre microphones
to
check fbr the
intcnded operation.
Flight Tcst
Check
A
fltght test is
reconrmended
as a
final installation
verification.
The perfbrmance
may
be
verified by
contacting
a
ground
station
at a range of at
least
50
nm
while
maintaining
an
appropriate altitude
and
over all nornral
flight attitudes. Perfbrntance
should
be checked using
lorv,
high,
and
mid
band frequencies.
SL40 Installution Munual
I5