TM
11-6625-820-12
Function
Function
Control, indicator or
Control, indicator or
connector
connector
of double loading the audio out-
put
circuit
of
the
receiver.
When
illuminated,
it
indicates
the
VOR/LOC
AC
BEARING
selector
Selects simulated bearing signals
lamp.
presence
of
the
115
volts,
400
from 0 to 360 degrees in 30-degree
switch
(12-position
cps
used
by
the
receiver.
increments.
These signals are
rotary).
When
illuminated,
it
indicates
the
GS DC lamp_ _ _ _ _
used
to
accurately
calibrate
and
presence
of
the
27.5
volts
dc
test the receiver, and to check the
used
by
a
glide
slope
receiver.
accuracy
of
the
OBS
indicator.
Provides
2-ampere
protection
for
VOR/LOC 2A fuse_ _ _
Indicates
the
direction
and
ampli-
TO-FROM meter_ _ _ _
the 27.5-volt dc line to the re-
tude
of
the
to-from
current
of
the
ceiver.
Provides
1-ampere
protection
for
receiver.
VOR/LOC 1A fuse_ _ _
_
DEVIATION
meter
Indicates
the
direction
and
ampli-
the 115-volt, 400-cps line to the
tude
of
the
deviation
current
receiver.
Provides
1-ampere
protection
for
from
the
receiver.
GS 1A fuse_ _ _ _ _ _
Normally
indicates
the
amount
of
FLAG meter_ _ _ _ _ _
the
27.5-volt
dc
line
to
the
glide
flag
current
from
the
receiver.
slope receiver.
Provides
a
means
to
check
the
SERVO
AMP
With
the
SERVO
AMP
TEST
TEST
pushbut-
RMI servo amplifier in the re-
pushbutton
pressed,
the
FLAG
ton
switch
(nor-
ceiver
by
applying
power
to
the
meter indicates the output of the
mally
open).
amplifier,
and
connecting
a
RMI servo amplifier in the re-
meter across its output.
ceiver.
RECEIVER
Alters
internal
circuit
of
Action
Switch position
MODEL
test
set
to
allow
testing
____
The FLAG is con-
Released
of
either
Radio
Receiver
switch
(2-position
nected
to
the
rotary)
on
R-1388/ARN-82
(position
VOR/LOC
flag
TS-2500A/
A)
or
R-1388A/ARN-82
terminals
of
con-
ARM-92
only.
(position
B).
nector
P2.
Pushed_ _ _ _ _
Applies
27.5 volts dc
b. RMI.
to
the
RMI
servo
amplifier
pin
of
P3,
Indicator
Function
and
connects
the
FLAG
meter
to
Indicates
the
radio
bearing
signal
RMI needles_ _ _ _ _ _ _
the
RMI
servo
obtained
from
the
receiver.
amplifier
output
Indicates
the
simulated
magnetic
RMI card_ _ _ _ _ _ _ _
pin on P3.
heading
signal
obtained
from
the
Provides
a
means
of
connecting
a
GLIDE
SLOPE
COMPASS
SIMULATOR.
connector.
glide
slope
receiver
to
the
test
set
when
checking
the
perform-
ance of a glide slope receiver.
c. Control Unit.
BRG-OBS
switch
Selects
either
the
precision
BEAR-
Control or indicator
Function
(2-position
ING
selector
or
the
OBS
indi-
rotary).
cator
to
supply
course
selector
information
to
the
receiver.
Switch position
Action
Power
switch
(3-
OFF_ _ _ _ _
Removes primary
Action
Switch position
position
rotary
power
from
the
BRG
(bear-
Places
the
precision
receiver.
concentric
with
BEARING
selec-
ing).
megacycle
selec-
PWR_ _ _ _ _ Applies primary power
tor in the test set
tor).
to
the
receiver.
circuit.
TEST_ _ _ _ _Sets the receiver in a
Places the OBS indi-
OBS
(omni
self-test
mode.
cater in the test set
bearing
Megacycle selector_ _ _
Tunes the receiver in one-megacycle
circuit.
selector).
increments.
___
AUDIO (2 jacks)
Provides
a
connection
for
an
audio
Kilocycle selector_ _ _ _
Tunes
the
receiver
in
50-kilocycle
output
meter.
increments.
Provides
a
connection
for
head-
PHONE jack_ _ _ _ _ _
Indicates
the
to
which
indicator_
_
When
the
headphone
phones.
the
receiver
is
tuned.
plug
is
connected,
the
PHONE
VOL control_ _ _ _ _ _
Controls
the
audio
output
level
of
jack
disconnects
the
AUDIO
the receiver.
jacks
to
eliminate
the
possibility
Change
3
