Philips PM 3266 - Page 29

29
AUTO,
TRIG,
SINGLE
(S8)
AUTO
depressed
TRIG
depressed
SINGLE
depressed
TIME/DIV
or
DELAY
TIME
(S15)
CAL (blue)
-TIME/DIV
(R11,S16)
UNCAL
(V6)
DC, LF,
HF
(S20)
DC
depressed
LF
depressed
HF
depressed
TRIG
or X-DEFL
(S22)
A
depressed
B depressed
COMP
(A and
B depressed
simultaneously)
EXT
EXT 10
LINE (EXT
and
EXT
10 depressed
simultaneously)
1 MJ2//15
pF
(X7)
2.2. 7.4.
Delayed
time-base
generator
DELAY
TIME
MULTIPLIER
(R1)
LEVEL-SLOPE
(R5,
S6)
Trigger-mode
controls;
3-way
push-button
switch.
The
main
time-base
is
free-running
in
the
absence
of trigger
signals.
The
time-base
generator
is
normally
triggered.
After
depressing
the
SINGLE
button,
the
time-base
generator
runs
only
once
upon
receipt
of
a
trigger
pulse.
If no
button
is
depressed
the
circuit
operates
effectively
as
if
the
SINGLE
mode
has
been
selected.
Time
coefficient
control
of
the
main
time-base;
23-way
rotary
switch.
Continuously
variable
control
of the
main
time-base
coefficients.
In the
CAL
position the
time
coefficient
is
calibrated.
Pilot
lamp
indicating
that the
CAL control
is
not
in the
calibrated
position.
Trigger
coupling;
3-way
push-button
switch.
Triggering
signals
are
direct
-coupled.
Trigger
coupling
via
low-pass
filter
for
frequencies
up
to
30 kHz
(for
external
triggering
via
band-pass
filter
of 7
Hz
to 30 kHz).
Trigger
coupling
via
a high-pass
filter
for frequencies
higher
than 30
kHz.
With
no
push-button
depressed,
the
circuit
operates
effectively
as with the
DC
button
depressed.
Trigger
source
or external
X deflection
selector;
4-way push-
button
switch.
X-deflection
only
when
push-button
EXT X DEFL
of
S2
(horizontal
display-mode
controls)
is
depressed.
Internal
triggering or
X deflection
signal
derived
from
channel
A.
Internal
triggering
or
X
deflection
signal
derived
from
channel
B.
Internal
triggering
or X
deflection
signal
derived from
channels
A and
B.
Triggering
on external
signal
connected
to the
adjacent
1 M
-
15
pF
socket (X7).
When the
EXT
X DEFL button
of the
horizontal
deflection
controls
is depressed,
this
socket
is connected
to
the
input
of the
horizontal
amplifier.
EXT triggering
or
X deflection
facilities
as above,
attenuated
by a
factor
of
ten.
Triggering
or X deflection
signal
derived
from
an internal
voltage
at mains frequency.
If
no
button
is depressed,
no
mode
is selected.
BNC
socket
for
external
triggering
or horizontal
deflection
Continuously
variable
control
of
the
delay
time,
operating
in
conjunction
with the
TIME/DIV
controls of the
main
time-base
generator.
Continuously
variable
control
for
selecting
the
level of
the
triggering
signal
at
which
the
delayed
time-base
generator
starts.