Philips PM 3266 - 2.2. OPERATING INSTRUCTIONS

27
2.2.
OPERATING
INSTRUCTIONS
INtTALT'i™r„H
r:',r”
“"“"V
-stalled
in
,cco,d,nce
with
section
2,1.
INSTALLATION
and
that
the
precautions
outlined
have
been
observed.
2.2.1.
Controls
and
sockets
(Fig.
2.3.)
2.
2. 1
. 1.
A,
ALT,
TRIG
VIEW,
CHOP,
ADD,
B
(SI
)
A
depressed
ALT
depressed
TRIG
VIEW
depressed
CHOP
depressed
ADD
depressed
B
depressed
All
pushbuttons
normal
ALT
and
TRIG VIEW
depressed
simultanuously
CHOP and
TRIG
VIEW
depressed
simultaneously
POSITION
(R3,
R4)
Vertical
display-mode
controls;
6-way
push-button
switch.
Vertical
deflection
is
achieved
by
the
signal
connected
to the
input
of
channel
A.
The
display
is
switched
over
from
one
vertical
channel
to
the
other
at the
end
of
every
cycle
of
the
time-base
signal;
i.e. the
A and
B
channels
are
displayed
on
ALTernate
sweeps.
The
display
is
switched
to
view
the
selected
trigger
signal.
Trigger
view
display
can
be
internal
via
A or
B channels
(A
or
B
of
S22
depressed)
or
external
via
external
input
socket
X7, when
EXT
or
EXT
-j-
1 0 of S22 is
depressed.
The
display
is
switched
over
from
one
vertical
channel
to the
other
at a fixed frequency,
both A and
B channels
being
displayed
during
the
same
sweep.
Vertical
deflection
is
achieved
by
the
sum
signal
of channels
A and
B.
Vertical
deflection
is
achieved
by the
signal
connected
to the
input
of
channel
B.
If no
push-button
is depressed,
the
instrument
operates
in the
ALT mode.
The signals
on channels
A, B
and TRIG
VIEW are
displayed
during
alternate
sweeps;
usually
suitable
for high frequency
signals
(see also
explanation
of
push-button
TRIG
VIEW)
The
signals on
channel
A,
B and
TRIG VIEW
are displayed
one after
the
other
at the
CHOP
frequency
during
the
same
sweep;
usually
suitable
for
low frequency
signals.
(See also
explanation
of
push-button
TRIG
VIEW)
Continuously
variable
control giving
vertical shift
of the
display.
PULL
TO INVERT
(S4, S5)
2-way
push-pull
switch,
integral
with
the POSITION
control,
for the
inversion
of the
signal
polarity.
Control
is depressed
for NORMAL
and
pulled
for INVERT.
AMPL/DIV
(S9, S1
1
)
Step control
of the vertical
deflection
coefficients;
1 1-way
switch.
CAL
(AMPL/DIV)
(R8/S10,
R9/S12)
Continuously
variable
control
of the
vertical deflection
coefficients.
In the CAL
position
the selected
deflection
coefficient is calibrated
UNCAL
(V4, V5)
Pilot lamp
indicating that
the
CAL
control is
not
in
the
CAL
position.
GAIN (R12,
R13) (screw-driver
control)
Continuously
variable
preset
control of
the overall
gain of the
vertical channels.