Philips PM 3266 - Page 30

30
TIME/DIV
(S13)
CAL
(blue)
-TIME/DIV
(RIO,
S14)
UNCAL
(V6)
DC, LF,HF
(S19)
DC
depressed
LF
depressed
HF depressed
A, B,
EXT,
MAIN
TB
(S21)
A depressed
B depressed
EXT depressed
MAIN
TB
depressed
1 MJ2//15pF
(X6)
2.2.
1.5. CRT display section
INTENS/POWER
ON
STORE/WRITE/FAST/ERASE
(MEMORY OFF)
STORE
This
control
incorporates
a push-pull
switch
that enables
choice
of
triggering
on
the
positive
or
negative-going
edge of
the
triggering
signal
(IN
-i-,
OUT
—
).
Time-coefficient
control
of the
delayed
time-base;
23-way
rotary
switch.
Incorporates
an OFF
position
whereby
the
delayed
time-base
is switched
off.
Continuously
variable
control
of the
delayed
time-base
generator time
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 control
and starting
point of delayed time-base
4-way
push-button switch.
Internal
triggering signal
derived from
channel
A after
delay
time.
Internal triggering signal derived from
channel
B
after delay
time.
Triggering
after delay time on an
external signal connected
to the adjacent 1 M
-
15
pF
socket.
Delayed
time-base starts immediately
after delay time.
With no button depressed, the circuit
operates effectively
as with the channel A button
depressed.
BNC
input
socket
for external triggering
signals.
Mains ON/OFF switch with LED indication
if the instrument
is switched
on.
In the (MAX) WRITE, FAST
or MEMORY OFF mode:
the
position of the knob determines the intensity of the wave-
form
that is
written
on the storage layer of the c.r.t.
In
the
STORE
mode: the position of the knob determines the
brightness of the reproduced waveform
on the c.r.t. screen.
If the brightness
is
increased the
storage time decreases.
Pushbutton
switches for the control of the storage system.
Enables recorded waveform
to be stored for
a
longer time
than available with the PERSISTENCE
control. The
INTENS
control
is
operative.
Enables
waveform
to be recorded
at
normal writing
speed.
The PERSISTENCE
and INTENS controls
are operative.
WRITE