P D R / D M E W I N D O W W I D T H A N D P O S I T I O N I N - Aeroflex ATC-1400A-2 Maintenance Manual

( 8 ) X P D R / D M E W i n d o w W i d t h a n d P o s i t i o n i n g
P R E R E Q U I S I T E S :
T E S T E Q U I P M E N T :
S E T - U P D I A G R A M :
DISPLAY SELECT
PRF SQTR Hz
VEL DME DIST
KTS NMi
RANGE XPDR
NMi CODE
FREQ
MHz
DBL INTERR / INTRF PULSE
DME REPLY
EFFICIENCY
50
40 60
0 0 0 0
OFF
30 70
20 80
10 90
0 100
PRF/SQTR
XPDR MODE
B
A C
T D 0 0 0 0
2 AC
1 CODE
1 AC FEET
2
TACAN IDENT
-
ON OFF TONE CODE ON OFF
OFF
POWER
F / P F / P T
2 2 1 1 O
I
INTRF
TAC
DISCRIMINATOR PULSE WIDTH
SYNC
X P D R W i n d o w W i d t h a n d P o s i t i o n i n g C a l i b r a t i o n T e s t S e t u p D i a g r a m
N O T E : D u r i n g p e r f o r m a n c e o f t h i s p r o c e d u r e , i f a c e r t a i n c o n d i t i o n o r s p e c i f i c a t i o n
c a n n o t b e v e r i f i e d , r e f e r t o a p p r o p r i a t e a s s e m b l y t e s t p r o c e d u r e i n 2 - 2 - 4 f o r
t e s t i n g a n d r e p a i r o f f a u l t y a s s e m b l y .
S T E P
1 . S e t A T C - 1 4 0 0 A - 2 c o n t r o l s a s f o l l o w s :
C O N T R O L
M A N / A U T O / M A N S T E P S w i t c h
D I S P L A Y S E L E C T C o n t r o l
F R E Q / F U N C T I O N S E L E C T T h u m b w h e e l s
D E C O D E R W I D E / N A R R O W S w i t c h
S E L F - I N T E R R / O F F S w i t c h
2 . C o n n e c t t e s t e q u i p m e n t t o A T C - 1 4 0 0 A - 2 a s s h o w n i n 2 - 2 - 2 , F i g u r e 3 5 .
3 . S e t P O W E R S w i t c h t o O N a n d a l l o w 1 0 m i n u t e w a r m - u p p e r i o d .
4 . S e t D u a l P u l s e G e n e r a t o r c o n t r o l s a s f o l l o w s :
C O N T R O L
P R F C o n t r o l
A m p l i t u d e C o n t r o l
P u l s e W i d t h C o n t r o l
S p a c i n g C o n t r o l
5 . V e r i f y " F " i s n o t d i s p l a y e d i n l e f t - m o s t d i g i t o f D M E - P R F H z / X P D R - % R E P L Y
D i s p l a y .
S u b j e c t t o E x p o r t C o n t r o l , s e e C o v e r P a g e f o r d e t a i l s .
MAI NT ENANCE MA NUAL
ATC-1400A-2
2 - 2 - 2 D ( 1 ) P o w e r S u p p l y
1 D u a l P u l s e G e n e r a t o r
1 G P I B C o n t r o l l e r
1 O s c i l l o s c o p e
1 5 0 Ω C o a x i a l C a b l e ( B N C t o B N C )
1 5 0 Ω C o a x i a l C a b l e ( B N C t o S M A )
1 5 0 Ω B N C T e e C o n n e c t o r
1 C o m p u t e r / C o n t r o l l e r ( G P I B M o d e )
TO VIDEO ASSEMBLY (TP3501)
UNIT UNDER TEST
DME-PRF Hz
XMTR FREQ MHz XMTR PWR
XPDR-% REPLY
FREQ / FUNCTION SELECT F RANGE/VEL/ACCEL
0 0 0 0 0 0 0 0 0 0 0 0
XPDR OFF
XXX.XX XXX0.0 XXX.00
XPDR P /P DEV DME P DEV XPDR PULSE WIDTH
SLS/ECHO L
2 3 2
O
A
D
0 0 0 0 0 0 0 0 0
+
RNG VEL ACCEL
C
L
E
A
P P P
2 3 2 R
NMi KTS FT/S/S
+ - + - + IN -1 NMi
VAR CAL ON OFF
CAL CAL CAL
AUTO SUPPRESSOR
MAN
T 1.0 S 1.45 S MAN ON OFF
D OUT NORM
STEP
FREQ
CAL O /
CAL MARKS VAR GEN XMTR
STEP
RATE
OFF
P R O C E D U R E
WATTS
DUAL PULSE
RF LEVEL
-dBm
GEN
TRIG
CW
NORM
OFF
RF I/O
F i g u r e 3 5
S E T T I N G
X P D R C O D E
1 0 9 0 M H z - X
N A R R O W
S E T T I N G
- 1 . 2 V P e a k
1 2 . 0 0 µs
SCOPE
OUT CH A CH B T
7506009
M A N
O F F
1 5 0 H z
0 . 8 µs
2 - 2 - 2
P a g e 2 8
F e b 2 / 0 9