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PI()NEEfiI
BEFORE USE,
PLEASE
OBSERVE:
o
INPUT TERMINALS
There are
two
pairs
of
inputs on the
front
panel,
four
pairs
on the
rear panel. The FRONT-REAR switch
selects
the
in-
puts-it
has
nothing
to
do
with ,,front,'
and ,,rear"
channels
stereo
system
(See
Fig.
3).
The AUDIO INPUTS on the rear panel
are
divided into LOW
and
HIGH (-20dB).
These
must be chosen according
to
the
applied signal level,
and
switched
with the
LOW/HIGH
SELECTOR.
o
CRT
PROTECTOR CIRCUIT
As a constant,
singie spot beam could eventually affect the
phosphorescent
material
on
the
CRT
screen,
a
special
protector circuit dims the
beam whenever
the vertical
and
horizontal deflections
are
both
smaller
than 10mm. Thus, the
beam
may dim during
a
pause
in the
music
when the
scope
is
used
to display
a
Lissajous
pattem.
o
THE LEVEL
METERS
When meter deflection
is too
small
for
accurate reading,
meter sensitivity can
be
increased
by setting the meter switch
at
-10, -20
or
-30d8.
The meters
will
then indicate 10,
20
30dB more than actual
signal
level. Be
very careful, however,
not
to let
the
meters
deflect
to
the right
edge as
this might
eventually damage them
(See
Fig.
4).
.
THE OSCILLATOR FREQUENCY CONTROL
When
tuming the oscillator
frequency
control knob
very
rapidly
in
either direction, the
signal may sometimes stop
completely. This
is
no indication of
a
defect but
is
due
to
the
CdS
element
in
the circuit.
In
such a case,
turn the knob to
SWEEP
AUTO position once, then turn
it
slowly
to
the
desir_
ed
frequency.
INPUT
l
and
3terminals
on
front
panel
,/^'
FRONT-REAR
\-)
se
le
croR swtrcH
AUDIO
INPUTS
on
rear panel
o
I
When
switch
is
off
adjust
pointer
to
0%
LEVEL
METEF|
-10 -Po
o
t
When
switch
is
off
adiust
pointer
to
0%
LOW/H
IGH
SE
LECTOR
SWITCH
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4
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