® O V E R L E V E L L a m p
When using weighting f i l t e r s the effect of the
f i l t e r is to m a s k f r o m the operator the presence
of an excessively high input level. T h u s d i s t o r t i o n
and the resulting errors can occur w i t h o u t the
operator being a w a r e of t h i s condition. T o prevent
t h i s the O V E R L E V E L warning lamp a l e r t s the
operator when the input level goes +15dB above
the f u l l seal level (OdB). .
® A V E R A G E / P E A K S w i t c h
T h i s s w i t c h is used to select the detection method.
In the released position average detection and
R M S display are in effect. Depressing the s w i t c h
selects either D I N or C C I R quasi-peak detection
and R M S display of the signal level. When C C I R /
A R M is selected the detection method is a u t o -
m a t i c a l l y switched to average detection and R M S
display regardless of the position of t h i s s w i t c h .
® W E I G H T S w i t c h group
T h i s s i x position selection s w i t c h group a l l o w s
selection of one of F L A T or J I S - A , D I N N O I S E ,
D I N A U D I O , C C I R or C C I R / A R M weighted
response. Selection of the F L A T position t u r n s
the unit into a wideband A C voltmeter. If no
button is depressed, the mode is a u t o m a t i c a l l y
C C I R / A R M .
J I S - A :
Used f o r noise level measurements in accordance
w i t h J S S
:
C 1 5 0 2 A , J I S "C5551A, I E C - A , and I H F - A
s t a n d a r d s .
D I N N O I S E ;
Used f o r noise level measurements in accordance
w i t h D I N standard 45405.
D I N A U D I O : "
Used f o r 1QHz~2.0kHz
:
. audio level measurements in
accordance w i t h D I N s t a n d a r d 45405.
C C I R :
Used f o r measurements of noise level in accordance
w i t h C C I R standards..
C C I R / A R M :
Used for noise level measurements in accordance
w i t h C C I R / A R M s t a n d a r d s .
T h i s measuring equipment is recommended by
Dolby L a b o r a t o r i e .
When the C C I R / A R M f i l t e r is used, average
detection is used regardless of the A V E R A G E /
P E A K s w i t c h .
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