Kenwood CO-1303D Instruction Manual
7 . A D J U S T M E N T( a ) A d j u s t m e n t o f D . C . B A LW h e n t h e t r a c e line is m o v e d u p o r d o w n as t h e V . G A I N c o n t r o l ( 8 ) is t u r n e d , a d j u s t t h e D . C . B A La d j u s t m e n t a s f o l l o w s :F i r s t p l a c e t h e o p e r a t i n g c o n t r o l s as f o l l o w s : V . A T T ( 7 ) a t G N D , V . G A I N c o n t r o l ( 8 ) a t f u l l yc o u n t e r c l o c k w i s e p o s i t i o n . A d j u s t ^ P O S I T I O N c o n t r o l ( 9 ) u n t i l t h e t r a c e l i n e is c e n t e r e d o n t h ec a t h o d e r a y t u b e s c r e e n .T h e n , t u r n t h e V . G A I N c o n t r o l ( 8 ) c l o c k w i s e a n d if t h e t r a c e l i n e s h i f t s , i n s e r t a s c r e w d r i v e r w i t hn a r r o w t i p ( h a v i n g a w i d t h o f less t h a n 2 . 5 m m ) in t h e h o l e f o r D . C . B A L a d j u s t m e n t a n d f i t t h e t i po f t h e s c r e w d r i v e r in t h e c e n t e r g r o o v e o f t r i m - p o t a d j u s t m e n t D . C . B A L . S l o w l y t u r n t h e t r i m - p o tin s u c h a m a n n e r t h a t t h e s h i f t e d t r a c e l i n e is r e s t o r e d t o its o r i g i n a l p o s i t i o n .R e p e a t t h e a b o v e s t e p s e v e r a l t i m e s u n t i l t h e t r a c e l i n e r e m a i n s u n m o v e d e v e n t h o u g h V . G A I Nc o n t r o l ( 8 ) is t u r n e d .A l l o w a t least 1 5 m i n u t e s o f o p e r a t i o n f o r t h e u n i t t o s t a b i l i z e b e f o r e m a k i n g t h i s a d j u s t m e n t .( b ) A d j u s t m e n t o f H O R . G A I N1) A p p l y a s i g n a l o f 3 V p - p a t a p p r o x . 1 k H z t o t h e H O R . E X T . I N P U T t e r m i n a l s ( 3 ) a n d - 4 -( 4 ) . W i t h S W E E P R A N G E s e l e c t o r s w i t c h ( 1 1 ) s e t a t t h e E X T p o s i t i o n , t u r n t h e S W E E PV A R I / E X T . G A I N c o n t r o l ( 1 2 ) t o t h e f u l l y c l o c k w i s e p o s i t i o n . T u r n H O R . G A I N ( 1 6 ) w i t hn a r r o w t i p s c r e w d r i v e r a s a b o v e m e n t i o n e d . S l o w l y t u r n t h e t r i m - p o t u n t i l t h e t r a c e l i n ep r o v i d e s a h o r i z o n t a l d e f l e c t i o n o f 1 0 D I V a n d t h e s e t is c a l i b r a t e d f o r a h o r i z o n t a l s e n s i t i v i t yo f 3 0 0 m V / D I V .2 ) S e t u p t h e o s c i l l o s c o p e f o r i n t e r n a l s w e e p b y p l a c i n g t h e S W E E P R A N G E s e l e c t o r s w i t c h ( 1 1 )i n a p o s i t i o n o t h e r t h a n E X T .A p p l y a n i n p u t s i g n a l t o t h e i ( 4 ) a n d V E R T I N P U T ( 5 ) t e r m i n a l s a n d a d j u s t t h e V . G A I Nc o n t r o l ( 8 ) u n t i l t h e w a v e f o r m a p p e a r i n g o n t h e c a t h o d e r a y t u b e s c r e e n p r o v i d e s a n a m p l i t u d eo f a p p r o x . 6 D I V .A d j u s t S W E E P R A N G E s e l e c t o r s w i t c h ( 1 1 ) a n d S W E E P V A R I / E X T . G A I N c o n t r o l ( 1 2 ) u n t i la n o r m a l w a v e f o r m a p p e a r s o n t h e c a t h o d e r a y t u b e s c r e e n . A d j u s t V R 3 s o as t o s e t t h eh o r i z o n t a l d e f l e c t i o n o f t h e w a v e f o r m t o a n a p p r o p r i a t e l e n g t h o f d e f l e c t i o n ( f o r i n s t a n c e1 0 D I V ) . |
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