IVIE IE-10A, Руководство владельца и оператора

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1. Add t h e SENSITIVITY s w i t c h s e t t i n g s t o t h e REFERENCE
v a l u e o f t h e dB l i n e on t h e g r a t i c u l e .
Be s u r e t o i n c l u d e
t h e minus s i g n s . Add t h e s w i t c h s e t t i n g s t o 140 dB-SPL.
2. Determine which g r a t i c u l e s c a l e i s t o be used b y o b s e r v i n g t h e
DISPLAY r e s o l u t i o n s w i t c h s e t t i n g .
3 . Add t o t h e r e f e r e n c e l e v e l t h e number o f dB t h a t t h e s i g n a l i s
above o r below t h e r e f e r e n c e l i n e , and be s u r e t o i n c l u d e t h e
c o r r e c t s i g n .
EXAMPLE
With one o f t h e s e n s i t i v i t y s w i t c h e s s e t t o dB and t h e o t h e r s e t t o -
60 dB, t h e dB l i n e on t h e d i s p l a y changes t o a r e f e r e n c e l e v e l
o f 80 dB SPL (140 dB
-
60 dB
=
80 dB SPL) as i n F i g u r e 25.
2 dB S c a l e
F i g u r e 25
dB-SPL Ref.
dB-SPL
The d i s p l a y r e s o l u t i o n s w i t c h i s i n t h e
2
dB p e r s t e p mode and s i g n a l
r e a d i n g s a r e measured u s i n g t h e c e n t e r g r a t i c u l e s c a l e which i s marked
i n
2 dB s t e p s .
A s i g n a l i s l o c a t e d - 8 dB below t h e r e f e r e n c e s e t t i n g o f
80 dB-SPL a t a l e v e l o f 72 dB-SPL (80 dB - 8 dB
=
72 dB-SPL).
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