L O N U L; R E C E I V E I M A G - Aeroflex TCAS-201-2 Maintenance Manual

S T E P
6 1 . S e t t h e S p e c t r u m A n a l y z e r a s f o l l o w s :
C O N T R O L
C e n t e r F r e q u e n cy
A m p S c a l e
S c a n W i d t h
6 2 . P r e s s R U N / S T O P K e y t o i n i t i a t e t e s t .
6 3 . P o s i t i o n p e a k a mp l i t u d e p o i n t o f 1 0 9 0 M H z a t t o p m a j o r g r a t i c u l e .
6 4 . V e r i f y 1 0 3 0 MH z s i g n a l l e v e l i s > 3 0 d B b e l o w 1 0 9 0 M H z si g n a l l e v e l i n S t e p 6 3 .
I f i n co r r e ct , a d j u st C 1 8 0 1 3 a n d C 1 8 0 1 6 ( 1 0 3 0 M H z N U L L P H A S E A D J) a n d
e i t h e r R 1 8 0 1 3 o r R 1 8 0 1 5 ( 1 0 3 0 M H z N U L L A M P L I T U D E A D J) .
N O T E :
L O N U L L
6 5 . A d j u s t R 1 8 0 0 7 a n d R 1 8 0 0 8 ( 1 0 6 0 M H z N U L L A D J ) u n t i l 1 0 6 0 M H z s i g n a l l e v e l i s
> 4 0 d B b e l o w 1 0 9 0 M H z s i g n a l l e v e l i n S t e p 6 3 .
6 6 . P r e s s R U N / S T O P K e y t o t e r m i n a t e t e s t .
R E C E I V E I M A G E
6 7 . D i sco n n e ct 3 0 MH z ( P 1 7 0 3 4 ) f r o m J1 7 0 3 4 a n d co n n e ct t e st e q u i p me n t a cco r d i n g
t o 2 - 2 - 2 , F i g u r e 3 0 .
GENERATOR
6 8 . S e t T C A S - 2 0 1 - 2 S i g n a l T y p e t o D S P M E A S U R E = a n d A t t e n u a t i o n t o 0 . 0 d B .
6 9 . P r e s s R U N / S T O P K e y t o i n i t i a t e t e s t .
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O n e r e s i s t o r ( R 1 8 0 1 3 o r R 1 8 0 1 5 ) m u s t r e m a i n f u l l y c w f o r c o r r e c t
T C A S - 2 0 1 - 2 o p e r a t i o n .
RF
SIGNAL
3 dB
ATTENUATOR
R e ce i ve I ma g e T e st S e t u p D i a g r a m
MAINTENANCE MANUAL
TCAS- 201-2
P R O C E D U R E
J17034
ANT
TCAS-201-2
F i g u r e 3 0
S E T T I N G
1 0 6 0 MH z
2 d B / D i v
N a r r o w
SPECTRUM
ANALYZER
8506003
2 - 2 - 2
P a g e 3 6
S e p 1 / 0 4