C O U N T E R T I M E B A S - Aeroflex ATC-1400A-2 Maintenance Manual

( 2 ) C o u n t e r T i m e B a s e
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
DME DIST
VEL
KTS NMi
RANGE XPDR
NMi CODE
FREQ
MHz
DBL INTERR / INTRF PULSE
DME REPLY
EFFICIENCY
50
40 60
0 0 0 0
OFF
70
30
20 80
10 90
0 100
PRF/SQTR XPDR P /P DEV
XPDR MODE
B
A C
0 0 0 0 0 0 0
T D
2 AC CODE
1
1 AC
2 FEET
P
TACAN IDENT
2
ON OFF TONE CODE ON OFF -
CAL
POWER OFF
F / P F / P T T
2 2 1 1 O D
I
INTRF
TAC
DISCRIMINATOR PULSE WIDTH
SYNC
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 . 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 2 8 .
2 . S e t A T C - 1 4 0 0 A - 2 P O W E R S w i t c h t o O N . V e r i f y A T C - 1 4 0 0 A - 2 f r o n t p a n e l
d i s p l a y s a r e i n a c c o r d a n c e w i t h p o w e r - u p s e l f t e s t i n 2 - 2 - 4 , T a b l e 5 5 .
3 . A l l o w a 1 0 m i n u t e w a r m - u p p e r i o d .
4 . V e r i f y f r e q u e n c y d i s p l a y e d o n F r e q u e n c y C o u n t e r i s 5 M H z ( ± 3 H z ) . A d j u s t
C 6 1 0 5 ( C o u n t e r A s s e m b l y ) ( 2 - 2 - 2 , F i g u r e 2 6 ) a s n e e d e d f o r p r o p e r f r e q u e n c y .
5 . S e t P O W E R S w i t c h t o O F F .
6 . D i s c o n n e c t t e s t e q u i p m e n t .
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 F r e q u e n c y C o u n t e r
1 5 0 Ω C o a x i a l C a b l e ( B N C t o S M B )
UNIT UNDER TEST
DME-PRF Hz
XMTR FREQ XMTR PWR
XPDR-% REPLY MHz
FREQ / FUNCTION SELECT F RANGE/VEL/ACCEL
0 0 0 0 0 0 0 0 0 0 0 0
XPDR OFF
XXX0.0 XXX.00
XXX.XX
DME P DEV XPDR PULSE WIDTH SLS/ECHO L
2 3 2
O
A
D
0 0 0 0 0 0
+
RNG VEL ACCEL
C
L
E
A
P P
R
3 2
NMi KTS FT/S/S
+ - + - + VAR CAL ON OFF IN -1 NMi
CAL CAL
AUTO SUPPRESSOR
MAN
1.0 S 1.45 S MAN ON OFF OUT NORM
STEP
CAL O / FREQ
CAL MARKS VAR GEN XMTR
STEP
RATE
OFF
C o u n t e r T i m e B a s e 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
P R O C E D U R E
TO COUNTER ASSEMBLY
WATTS
(TP6101)
RF LEVEL
-dBm
CW
NORM
OFF
RF I/O
50 OHM COAXIAL CABLE
F i g u r e 2 8
FREQUENCY
COUNTER
OUTPUT
7506004
2 - 2 - 2
P a g e 1 0
F e b 2 / 0 9