Apollo SL7
0
The Apollo
S
L
70 M
ode
C
Transponder c
omplements
th
e Apollo SL se
ries of
slimline avioni
cs. The SL70
provides Mo
de
A/C functi
onality cert
ifie
d t
o
TSO-
C74c Class 2A meeting
VFR
and IFR re
qu
irements, oper
ates on 10-35 VDC,
in
clu
des squ
awk co
de
dis
pl
ay an
d selecti
on
, stan
dby,
altitu
de, an
d
iden
t
operation. All
of these
feat
ures are contained
in the sp
ace
-saving 1.3”
H
x 6.
25
”W
form fac
tor, wi
th
bright easy-to
-read LE
D cha
racters, and use
r-friendly operation.
A pho
tocell on
the front of the
SL70 adju
sts t
he LED intensity for am
bient
light
conditions.
The SL70 will automatically
test its receive function
if no
interrogations
have been received
in the last
30 seconds.
Knobs
A single
knob
on
the left
si
de c
ontrols power o
n/off.
Rotate
th
e knob
clo
ckw
is
e to
turn transponder power
on. Ro
tate the
knob
co
unterclockw
ise
to turn power o
ff.
Dual concentri
c knobs on th
e right side
are used to select squawk code
s and
change altitude
values. Turning the large,
out
er knob moves
the cursor t
o al
low
editing of
the se
lected
character
. Turnin
g the s
m
all, inner knob changes values.
Pushbuttons
Press the pushbutton once to activate t
he selected operation.
An LED above
eac
h
pushbutt
on wil
l light when
tha
t bu
tton
is
pressed.
IDE
NT
Press the
IDE
N
T
butt
on onc
e to re
ply wi
th
an
identi
fying
squawk c
ode,
Ident
mo
de. In
Iden
t mo
de, the
Rep
ly LED will
be
lighted
for 2
0
seconds. The
R
eply
(Ident) LED
will also flash wh
en the
SL70 ge
nerates transponder replies.
SBY
Press
SBY
to
pl
ace the transponder in “Stand
by” mode.
The
SL70 is “on,” but no
informat
ion w
ill be transmi
tte
d.
ON
Press for Mode
A operation.
The SL70 is
“on
” and will transmit its
squawk
code
when interrogated.
ALT
Press for Mode
C operation. The SL70 is
“on” and will trans
m
it its squawk
code
and altitude
wh
en interrogated.
VFR
Press
VFR
onc
e to
set
the
VFR squawk
co
de
. Press
VFR
a
s
ec
on
d t
im
e t
o t
og
gl
e
between the
VFR squawk c
ode
and
the
previou
sly entered code.
HLD
Press to enable/disable altitu
de hold. The LE
D above the
HLD
but
ton
is li
ghted
when altitude
h
old is enable
d.
Selecting a
Squawk C
ode
The selected s
quawk co
de wi
ll always be in
use. As you change a squawk code,
the original code will
be sent u
ntil you
are finished selecting the new code.
When
changing a code,
the
display
will stop fl
ashing and selection is stopped if the
controls are not used
for three
second
s or
mor
e. Pressing any
pushbutt
on wil
l also
end co
de selecti
on. The squaw
k co
de is
auto
m
atically reset to
the VFR c
ode
when
the SL70
is tur
ned back on.
1.
Rotate the
LARGE
knob clockwise one posi
tion. The first
character of th
e
squawk code
will flash.
2.
Rotate the
SM
ALL
knob to the
desired nu
mber
for the
first
dig
it.
3.
Rotate the
LAR
G
E
k
no
b t
o m
ov
e t
he
c
ur
so
r t
o t
he
n
ex
t d
es
ir
ed
d
ig
it.
T
ur
n t
he
SM
A
L
L
knob to
select the
desire
d number.
4.
Repeat ste
p
3 fo
r each of
the de
sired d
igits.
5.
After the last
digi
t is selecte
d, rotate
the
LARGE
knob clockwise
one mo
re
position.
The display will s
top
flashing and th
e new code will be sent.
Sp
ec
ia
l Sq
ua
w
k
C
o
d
e
s
1200 – Def
ault VFR code in the
USA
.
7500 - Hijacking
7600 – Loss of communications
7700 – Emergency
See t
he
Airma
n’s
Infor
m
ation Ma
nu
al for
more
inform
ation ab
out
squa
wk codes
.
