Kenwood AG-252 Instruction Manual page 13

Oscillator
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6 - 1 - 3
U s i n g
a s S q u a r e Warn
A G - 2 5 2 f e a t u r e s e x c e l l e n t
a c t e r i s t i c s ( 1 2 0 n s a s s t a n d a r d
I t
h a s n o
c o u p l i n g
c a p a c i t o r s
s o
t h e
s a g ( d e f l e c t i o n
a s
5% a t
50Hz.
B y a p p l y i n g
w a v e
t o
a n a m p l i f i e r
o f
a m p l i f i e r
c a n be o b s e r v e d o n
T o
t e s t
a n a m p l i f i e r ,
1)
C o n n e c t A G - 2 5 2 a n
a n o s c i l l o s c o p e a s s h o w n
2 )
P r e s s W A V E
F O R M
t o
o b t a i n
s q u a r e w a v e s o f
and:
a m p l i t u d e .
3 )
D u r i n g
t h e
t e s t ,
c h a n g e t h e
s a r y .
T h e r e l a t i o n s h i p
a m p l i f i e r
c h a r a c t e r i s t i c s i s s h o w n
O s c i l l a t o r
r i s i n g
a n d
f a l l i n g
c h a r -
c h a r a c t e r i s t i c ) .
in
t h e
o u t p u t
s t a g e ,
o f
t o p
s e c t i o n )
i s a s
l o w
s u c h a g o o d
s q u a r e
i n p u t , v a r i o u s c h a r a c t e r i s t i c s
a n
o s c i l l o s c o p e .
p r o c e e d a s f o l l o w s :
a m p l i f i e r
t o
be t e s t e d
a n d
in
F i g . 7 ..
®
t o
t h e
"
"
p o s i t i o n
a p p r o p r i a t e
f r e q u e n c y
f r e q u e n c y
a s neces
b e t w e e n
w a v e f o r m s
a n d
in
F i g . 8
A G - 2 5 2
O u t p u t
W a v e f o r m
.
Amplifier
under test
. F i g . 7
A m p l i f i e r
. C h a r a c t e r i s t i c
F l a t
f r e q u e n c y c h a r a c t e r i s t i c
o v e r
10 t i m e s
the
i n p u t
f r e q u e n c y .
F r e q u e n c y o f
a b o u t
10
t i m e s
the
i n p u t
f r e q u e n c y
is c u t
o f f .
F r e q u e n c y
of
a b o u t
1/10
o f
the
i n p u t
f r e q u e n c y
is c u t
o f f .
P e a k
a p p e a r s on
f r e q u e n c y
o f
a b o u t
10 t i m e s t h e
i n p u t
f r e q u e n c y .
F i g . 8
Oscilloscope
13

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