Kenwood AG-203, Инструкция по эксплуатации, Страница: 7 / 24

5 . O u t p u t A t t e n u a t o r
T h e 6 - p o s i t i o n o u t p u t a t t e n u a t o r s e l e c t s a t t e n u a t i o n s
o f O d B t o - 5 0 d B
m
1 0 d B s t e p s . A t t h e O d B p o s i t i o n
w i t h t h e O U T P U T c o n t r o l t u r n e d f u l l y c l o c k w i s e , t h e
o u t p u t v o l t a g e ( s i n e w a v e a t n o - l o a d t i m e ) is more t h a n
7 V r m s .
T h e o u t p u t i m p e d a n c e Is r a t e d f o r 6 0 0 a a n d t h e at-
t e n u a t i o n a c c u r a c y is as h i g h a s ± 1 .OdB a t a 8 0 0 o l o a d .
6 . P o w e r S u p p S y
T h e p o w e r s u p p l y c i r c u i t is p o w e r e d b y A C
1 0 0 V , 1 2 0 V o r 2 2 0 V ) a n d d e l i v e r s D C ± 2 2 V s u f f i c i e n t l y
s t a b i l i z e d b y large c a p a c i t y s m o o t h i n g c a p a c i t o r s
( 2 2 0 0 M F x 2 ) a n d a v o l t a g e s t a b i l i z e r .
Wien
bridge
oscillator
c i r c u i t
E X T . S Y N C
S q u a r e
w a v e
shaping
c i r c u i t
Output
level
control
+ D C 2 2 V -
- D C 2 2 V •
P o w e r
supply
. unit
O U T P U T
A C I 00V / 1 2 0 V / 2 2 0 V / 2 4 0 V
.50/60HZ
F i g . 1 B l o c k D i a g r a m
7
Selector-
s w i t c h
Output
c i r c u i t
Output
attenuator