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Instruction Manual
Band Pass Filter Type 1617
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::::::-
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..
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- " ' -
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..
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033-0143
1617
Th
e
Type 1 61 7 has 50 third -octave filter
bands
with
centre
frequencies
2 Hz
to
160 kHz
,
41
overlapping
octave filter bands
from 2 Hz to 20 kHz
,
A
,
6
,
C,
D-weighting
networks
,
and a
Linear pass band 1 Hz to
200 kHz
.
The filter pass bands fulfil
the
most
severe standards,
IEC 225
-
1966
,
DIN
45651
(1
/
1-oct)
and
45652
(1
/
3 -oct).
and ANSI 51
.
11
-
1966 Class II (1
/
1-oct)
and
Class III (1
/
3-oct)
.
In
addition
to facilities for filter scanning
controlled
by 6 & K Level Recorders, there
is
a built-in interface to the proposed IEC
standard
via which full
control
can be
exer
-
cised
.
An internal control system is
able
to
programme the averaging times of the mea
-
suring instrument that is
connected
to the
Type 161 7
so
that the optimum 6T product
is
maintained during a frequency scan
.
~
Bruel
&
Kjcer
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