Aeroflex ATC-1400A-2 Maintenance Manual page 32

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6 8 . U s i n g O s c i l l o s c o p e , v e r i f y p u l s e s p a c i n g i s 1 9 . 9 µs ( ± 0 . 1 5 µs ) .
6 9 . S l o w l y i n c r e a s e D u a l P u l s e G e n e r a t o r o u t p u t p u l s e s p a c i n g t o t h r e s h o l d w h e r e
" F " d i s a p p e a r s , t h e n j u s t r e a p p e a r s o n D I S P L A Y S E L E C T R e a d o u t .
7 0 . U s i n g O s c i l l o s c o p e , v e r i f y p u l s e s p a c i n g i s 2 0 . 8 µs ( ± 0 . 1 5 µs ) .
7 1 . S e t D E C O D E R W I D E / N A R R O W S w i t c h t o N A R R O W .
7 2 . S e t D u a l P u l s e G e n e r a t o r o u t p u t p u l s e s p a c i n g f o r 2 0 . 1 9 µs ( ± 1 0 n s ) .
7 3 . A d j u s t R 3 2 7 ( W i n d o w P o s i t i o n A d j u s t ) ( 2 - 2 - 2 , F i g u r e 2 5 ) a s n e e d e d u n t i l " F "
a p p e a r s a t o n e h a l f b r i g h t n e s s ( f l i c k e r i n g ) o n D I S P L A Y S E L E C T R e a d o u t .
7 4 . S e t D u a l P u l s e G e n e r a t o r o u t p u t p u l s e s p a c i n g f o r 2 0 . 4 1 0 µs ( ± 1 0 n s ) .
7 5 . A d j u s t R 3 3 0 ( W i n d o w W i d t h A d j u s t ) ( 2 - 2 - 2 , F i g u r e 2 5 ) a s n e e d e d u n t i l " F "
a p p e a r s a t o n e h a l f b r i g h t n e s s ( f l i c k e r i n g ) o n D I S P L A Y S E L E C T R e a d o u t .
7 6 . S e t P O W E R S w i t c h t o O F F .
7 7 . 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
P R O C E D U R E
2 - 2 - 2
P a g e 3 2
F e b 2 / 0 9

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