Specifications
l61
7
and
1
61
8
Band
Pass
Filters
:
In accordance
with
IEC
225
1966
, DIN
45651
and
45652
, and ANSI
Sl
.
ll-
1966
best classes
The
total integrated r
andom
white
noise
power passed by
the
filters
in
these
in
-
struments
is e
qual
to
that
which
would
be
passed by an ideal
filter
Centre
Frequencies
1617
:
1/ 3
oct:
2
Hz
to
160
kHz
(50
bands)
1/ 1
oct
: 2
Hz
to
20
kHz (41 overlapping
bands at 1/ 3 octave
interv
als covering
14
octaves)
Centre
Frequencies
1618
:
1/ 3
oct:
2
Hz
to
20kHz
(41 bands)
1/ 1
oct
: 2
Hz
to
20
kHz (41 overlapping
bands at 1/ 3 octave intervals covering
14
octave
s)
Attenuation
Outside
Pass
Band
:
1/ 3
oct
: >
75
dB at 5 x and 11 5
ce
n-
tre
fr
e
quency
1/ 1
oct:
>
60
dB at S x and l / S centre
frequency
Attenuation
at
Centre
Frequency
(fm)
:
1/ 3
oct
and
1/ 1
oct
:
OdB
±O
,
5dB
Maximum
Peak-to-Valley
Ripple
:
1/ 3
oct:
O,
5dB
1/ 1
oct
: O,
5dB
Overall
Selective
Frequency
Range
:
1617
:
l.4Hz
to
lS0kH
z
1618
:
l.4H
z to
22kH
z
Linear Pass
Band
(Available
from
Range
switch
or M a
nual
Filter Selector):
1617:
l,6Hz
to
160kHz
attenuati
on is OdS
±
0,3
dB
1
Hz
to
200
kHz
att
e
nuation
is 0 dB
± 0,5 dB
1618:
1,6
Hz
to 31 ,5 kHz a
tt
e
nuati
on is 0 dB
± 0,3 dB
1
Hz
to
40
kHz atte
nuati
on is 0 dB
± 0,5 dB
Filter
Selection
:
Type
1617
:
2
Hz
to 1
60
kHz
2
Hz
to
40
kHz, D, A , B, C, Linear
Type
1618
:
2
Hz
to
20
kHz, A ,
Linear
Switching
control
:
Manual
:
from
"
Manual
Filter Se
lector"
Automatic
:
from
a Level Recorder
Automatic
: to control an X-V Recor
der
(1617
only)
(When sc
anning
octave filters, e
ither
full
-
octave or
third
-octave stepping can be se-
lected)
Automatic
: via
th
e
IEC
interface
bus
(1617
only)
Weighting
Networks:
Curves A, B, and C are in accordance
with
IEC
179
for
pr
ecision
sound
level
meters
(1
61
S has
A-w
e
ighting
only)
Curve D is
in
a
cc
ordance
with
IEC
537
Averaging
Time
Programmes
(1617
only):
Used
with
Measuring
Amplifi
ers
that
fea-
ture
remote controlled averaging
tim
es
(Type
2607)
Programmes
Available
:
See Table
3 and Fig .S
Input:
Via B & K coaxial socket on
front
panel,
paralleled
by
BNC
socket on rear
Impedance
:
1
MOl
l
l00pF
Voltage
:
1 V RMS
nominal
5 V peak
maximum
5,
6V
(± O,
3V)
overload
warning
lamp
lights
Distortion
:
Band
Pass
Filters
:
< 0 ,1%
with
1 V signal level
< 0,3%
with
3,6 V signal level
Linear
Range:
< 0 ,1%
with
1 V signal level
<
0,3
%
with
3,6 V signal level
Noise
:
<
150j1V
(typ.
100)
Band Pass Filters
<
11
Oj1V (typ.
SO)
A , B, and C-w eighting
network
s
<
250j1V
(typ.
lS0)
D-weig
hting
net-
w ork
< 1
OOj1V
(typ.
SO)
Linear range
Output
:
Via B & K coaxial socket on
front
panel,
paralleled
by
BNC
socket on rear
Impedance
:
<
500
Minimum
Load
Impedance
:
5
kO
11
1 nF
for
less
than
± 0 ,2% reading
error
DC
Ramp
Output
(1617
only):
Used for
controlling
the
X-axis
of
an X-V
Recorder
o V
at
the
starting
fr
e
quency
O,
20S
V per 1/ 3 octave increase rate
10.4
V
maximum
output
Load impedance >
10
kO
Digital
Bus
Interface
(1617
only):
Conforms
with
the
proposed
IEC
Stand-
ard Digital Interface
for
Progra
mmable
In-
strum
e
ntation
Contains
the
following
function
s:
Acceptor
Handshake (AH 1) .
Listener
Function
(L2)
Remote
Local Function (RL2)
Parallel Poll
Function
(PP2)
Environmental
Conditions
:
Operating
Temperature
Range
:
5°C to
40
°C (41 °F to
104
°
F)
giv
e
no
ef
-
fect
Storage
Temperature
:
-25
°C to +
70
°C (-
13
°F to +
15S
0
F)
Permitted
Humidity
Range
:
The
outputs
from
the
i
nstruments
are ac-
curate
between 0 and
90
% relative
hu-
mid
i
ty
, provided
there
is
no
condensation
Power
Requirements
:
100
,
115
,
127
,
200
,
220
,
240
V AC
±1
0%
50
to
400Hz
1617
: appro
x.
30VA
1618
: approx.
2SVA
Comply
with
IEC
34S
Class I
Cabinet
:
Suppli
ed as model A
(light
-
weight
metal
cabinet), B (model A in a
mahogany
cab-
inet), or C (as A
but
with
flanges for
standard
19
"
ra
ck
mounting)
Dimensions
:
Height
:
133
mm
(5,
25
in)
Width
:
430
mm
(16
,9 in)
Depth
:
200mm
(7,
9in)
Weight:
1617
: 6,
5kg(14,3Ib)
1618
: 6,3
kg
(13
,
9Ib)
Accessories
Included
:
1 AN
0010
Power cable
2
JB
0002
Banana plug
2
JP
0035
BNC
plug
2
JP
0101
B & K coaxial plug
1
JP
0703
7-pin DIN plug
1
JP
OS02 S-
pin
DIN plug
2
VF
0012
Fu
se
Accessories
Available
:
See
Fig .
12
.
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