TB 9-4920-456-24
Table 5. Invalid Messages Continued.
Test instrument
Test instrument
CODE/ATTEN
CODE/ATTEN
SELECT
SELECT
mode keys
mode keys
Numerical keys1
Numerical keys1
M-1
7700
M-C
7771
M-1
7711
M-C
7773
M-1
7722
M-C
7775
M-1
7733
M-C
7777
M-1
7744
M-3/A
0008
M-1
7755
M-3/A
0900
M-1
7766
M-3/A
0090
ENTER key on CODE/ATTEN SELECT keyboard must be pressed for each numerical code.
1
(4) Press TI STBY key on TRANSPONDER CONTROL keyboard.
(5) Set SELECT S1 and INPUT/OUTPUT S2 switches on calibration test fixture
and TI TRANSPONDER CONTROL key entries to illuminate and/or extinguish indicator
lights. Multimeter will indicate high or low level conditions as listed in table 6.
Table 6. Key Indicator Light Test.
Calibration test fixture
Key entry
switch positions
Test instrument
and
SELECT
INPUT/OUTPUT
keyboard
indicator
indications1
S1
S2
section
light
Light
(CODE/ATTEN
B
12
X PULSE
Lit
Low
SELECT)
B
12
XPULSE
Off
High
(MODE 4)
B
13
ZERO
Lit
Low
B
13
ZERO
Off
High
(TRANSPONDER
Lit
Low
B
14
BOT ANT
DIV ANT2
CONTROL)
Off
B
14
DIV ANT
Lit
High
(TRANSPONDER
B
15
TOP ANT
Lit
Low
DIV ANT2
CONTROL)
Off
Lit
High
B
15
DIV ANT
TOP ANT2
Off
(TRANSPONDER
B
16
MON
Lit
Low
CONTROL)
B
16
MON
Off
High
(MODE 4)
B
17
LIGHT ENBL
Lit
Low
B
17
LIGHT ENBL
Off
High
(MODE 4)
B
18
AUDIO ENBL
Lit
Low
LIGHT ENBL2
Lit
(MODE 4)
B
18
AUDIO ENBL
Off
High
LIGHT ENBL2
Lit
(TRANSPONDER
C
1
M-1 BIT
Lit
Low
CONTROL)
C
1
M-1 BIT
Off
High
(TRANSPONDER
C
2
M-2 BIT
Lit
Low
CONTROL)
C
2
M-2 BIT
Off
High
See footnotes at end of table.
12