Piper SENECA III - Page 378

SECTION 9
PIPER
AIRCRAFT
CORPORATION
SUPPLEMENT
19
PA-34-220T,
SENECA
III
CONTROL/
DISPLAY
FUNCTION
TRACK
[
4
]
When
pressed, the
yellow
track
cursor
appears
button
and
moves
to
the
left
while
held
depressed.
Operation
is
as
explained
above.
GAIN
control
Varies
the
radar
receiver
gain
when
in the MAP
mode.
Gain and
the
STC
are
preset
in
TEST
function and
in
the
WX and WX A
modes.
BRT
control
Adjusts
brightness
of
the
display
for
varying
cockpit
light
conditions.
NAV button
Operational
only
when
optional
IU-2023A
(push-on/push-off)
Remote
Computer
Unit is
connected.
When
actuated,
provides NAV
information
super-
imposed
over
the
MODE
selected
(WX, WXA,
or
MAP).
If
interface
is
not
connected,
the
words
NO
NAV
will
be
displayed
in
the
lower
left
corner.
[
g
]
RANGE
Clears the
display
and
advances
the
indicator
button
to
the
next
higher
range
each
time
the
button
is pressed
(eg:
20
to
40, 40
to
80,
etc.),
until
240
mile
range
is
reached.
The
range
selected
is dis-
played
in
the
upper
right
corner
(on
the
last
range
mark),
and
the
distance
to
each
of the
other
range
marks
circles is
displayed along the
right
edge
of the
circles
(arcs).
CONTROL/DISPLAY
FUNCTIONS
(cont)
Table
4-3
(cont)
REPORT:
VB-ITIO
ISSUED:
FEBRUARY 25,
1982
I
9-128,
4
of 6