Simrad RA771UA, Инструкция по эксплуатации

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c a b l e
t o
s h i p ' s
frame
7
t o s h i p ' s frame
5 . 6 . 3 Adjustments
A f t e r completing i n s t a l l a t i o n and c o n n e c t i o n , t u r n on
power, s t a r t t h e b a s i c o p e r a t i o n d e s c r i b e d
i n
p a r a g r a p h 2 ,
check f o r
normal
o p e r a t i o n and t h e n perform t h e f o l l o w i n g
a d j u s t m e n t s o r c h e c k s .
BREAK I N PROCEDURE OF STORED MAGNETRON
F o l l o w i n g p r o c e d u r e i s recommended f o r " B r e a k In"
t h e s t o r e d magnetron. Otherwise t h e magnetron sometimes
e x h i b i t s u n s t a b l e o p e r a t i o n such
a s
a r c i n g o r moding a t
i t s
i n i t i a l o p e r a t i o n a f t e r l o n g p e r i o d o f s t o r a g e and
make
t h e o p e r a t i o n more d i f f i c u l t .
1. Extend p r e h e a t t i m e
a s
l o n g a s p o s s i b l e ( p r e f e r a b l y 20
t o 3 0 m i n u t e s ) .
2 . S e t t h e p u l s e l e n g t h t o t h e s h o r t e s t one and s t a r t t h e
o p e r a t i o n . When t h e o p e r a t i o n i n t h e
s h o r t e s t
p u l s e
i s
s t a b l e t h e n go t o o p e r a t i o n
i n
l o n g e r p u l s e and r e p e a t t h e
s i m i l a r
s t e p u n t i l t h e o p e r a t i o n r e a c h e s t o t h e f i n a l
p u l s e c o n d i t i o n .
I f t h e
magnetron e x h i b i t s u n s t a b l e o p e r a t i o n ,
turn
t h e h i g h v o l t a g e p r e h e a t t h e magnetron f o r 5
t o
1 0 minutes and r e p e a t t h e s t e p
a l l
o v e r a g a i n from t h e
b e g i n n i n g . T h i s w i l l i n s u r e t h e s t a r t of o p e r a t i o n
of
t h e
s t o r e d magnetron
more
smoothly.
D I R E C T I O N
ADJUSTMENT
t o t h e r e a l b e a r i n g i n t h e SETUP mode.
*
T a r g e t c a t c h i n g and measurement
c l e a r l y observed on t h e r a d a r w i t h i n a r a n g e o f
0 . 5
t o
1 . 0
N M .
with a compass.
*
Adjustment
t h a n
3
s e c o n d s .
T h i s a d j u s t m e n t
i s t o
a d j u s t t h e r a d a r
s c r e e n
b e a r i n g
F i n d
a
s m a l l t a r g e t
i n
t h e head d i r e c t i o n which
i s
Measure t h e t a r g e t b e a r i n g a g a i n s t t h e s h i p ' s head
S e t t h e
EBL
t o t h e b e a r i n g measured from t h e t a r g e t .
E n t e r t h e menu by p r e s s i n g t h e b r i l l i a n c e key more
5- 8