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o Preparation
Emit radio waves from
s h o w n i n i l l u s t r a t i o n .
o To Adjust
a n A M S S G u s i n g c o i l a n t e n n a a s
N o t e : A f t e r a d j u s t i n g T 6 ( C o i l o f b a r a n t e n n a ) , m e l t e l e c t r o w a x w i t h s o l d e r i n g i r o n a n d f i x i t i n p o s i t i o n .
5 . 1 1 F M I F A D J U S T M E N T
o Connection Diagram
To Adjust
A d j u s t T 3 a n d T 4 s o t h a t n o i s e l e v e l i s h i g h e s t a t w h i t e
n o i s e .
F i g . 4 2
o
1 .
F r e q u e n c y o f A M S S G
V a r i a b l e C a p a c i t o r P o s i t i o n
A d j u s t i n g P o i n t
R e m a r k s
1 . 5 1 5 k H z ( 4 0 0 H z , 3 O o / o m o d u l a t i o n )
o u t p u t l e v e l 6 O d B / m .
M a x i m u m ( t u r n t h e t u n i n g k n o b
c o u n t e r c l o c k w i s e u n t i l l o w e n d . )
T7
5 1 5 k H z c a n b e
r e c e i v e d .
2 . 1 , 6 7 0 k H z ( 4 0 0 H z , 3 0 % m o d u l a t i o n )
o u t p u t l e v e l 6 0 d 8 / m .
M i n i m u m ( t u r n t h e t u n i n g k n o b
c l o c k w i s e u n t i l h i g h e n d . )
rc4
1 , 6 7 O k H z c a n b e
r e c e i v e d .
3 . R e p e a t ( 1 ) a n d ( 2 ) a l t e r n a t e l y a n d a d j u s t s o t h a t 5 1 5 - 1 , 6 7 O k H z a r e c o v e r e o .
4 . 6 0 0 k H z ( 4 0 0 H z , 3 O o / " m o d u l a t i o n )
o u t p u t l e v e l 4 O - 5 0
d 8 / m .
T u n e d t o 6 0 0 k H z .
T u n e d t o 1 , 4 0 0 k H z .
T 6 ( C o i l o f
b a r a n t e n n a )
M a x i m u m o u t p u t .
M a x i m u m o u t p u t .
5 . 1 , 4 0 O k H z ( 4 0 0 H z . 3 o o / o m o d u l a t i o n )
o u t p u t l e v e l 4 O - 5 O d B / m .
TC3
6 . R e p e a t ( 4 ) a n d ( 5 ) a l t e r n a t e l y a n d c o n f i r m t h a t t u n i n g p o i n t e r i n d i c a t i o n i s c o r r e c t .
-,r\-
2 5
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