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2.3
CONTROLS
AND
CONNECTIONS
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INPUT
terminals.
Two
terminals, one
insulated for signal connection.
Connection
can
be
made
by banana
plugs or spade terminals.
FUNCTION
switch
(S2).
Four
position
push-butuon switch.
i''be
Level
position
ensures
only
level
measurements
are
made
whereas
with
the
400
Hz
or lOCO
Hz
push
button selected the
Instrument
will
measure
both
level
and
distortion factor.
With
the
CAL
push
button selected a
pre
-determined
signal
is
led
to
the
distortion
measuring
circuit
as a
distortion calibration
check.
LEVEL RANGE
S'A'itch
(HI).
Consisting
of
six
push
buttons, selection
of
which
will
deter-
mine
the full-scale
range
of the level fheter.
Each
button
is
calibraied
in
volts
and dB's.
LEVEL
meter.
Consists
of
three scales,
two
voltage scales
in
black and
a
dB
scale
in
red
(0
dli
-T
V).'
'''
^
'
'
DISTOFiTION
RANGE
switch
(H3)'.'
Consisting
of
six
push
buttons, selection
of whicii will
determine
the
full-scale
range
of
the
distortion
meter.
Each
push
button
is
calibrated
in
full-scale distortion
percentage and
dB's.
DISTORTION
meter.
Consists
of
three scales,
two
distortion fdetor
range
scales
in
black
and one
distortion scale (dB)_in red.
(0
dB
=
100%
distortion
factor).
,
^
^OPERATION
"
'
co
V
The
followmg'instriictibns
are
intended' as a
Distortion
Meter.
However, because
of the
tions
will
become
unnecessary.
detailed guide
'to
tiie
oj'ieratibn'of
the
TE' 2337A'
Automatic
units
inherent
simpllci^V
continued use
bf
those instruc-
2.4.1
Preparation
for
use
Before
commencing measurement,
:
,
(i)
.
ensure
that the
rnu.ms
transformer
^tapping,
and
fuse rating
aierrUtroct
for the
supply
in
use.
TF
2337A
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