PROG
CHAN or TRIG—
Pushbutton
selects one
of
two
modes;
when
light
is
on,
those
controls associated with
programming
the
TRIGGER
FUNCTION
are
operable
(see
6,
7
and
10).
When
light
is
out,
those
controls
associated
with CH1,
CH2, CH3, CH4
setup
conditions
are
operable
(see
6
and
2).
DISPLAY
—
Pushbutton
turns
on
or
off
the display
of
the
incoming
signal selected by controls
listed under
number
61.
Nondisplayed
channels
may
still
contribute to
the
TRIGGER
FUNCTION.
VOLTS/DIV
—
Two
pushbutton
switches
increase
or
decrease vertical
deflection factor
of
the
channel
selected
by
controls
listed
under
number
6
1
.
GND
—
Pushbutton
grounds
the
selected
channel
amplifier
input
and
disconnects
the
incoming signal,
of
the
channel
selected
by
controls
listed under number
61
.
1MΩ/50Ω
—
Pushbutton
switch
selects
input impedance to
be
either
one
megohm
or
50
ohms
of the
channel
selected
by
controls
listed
under
number
6
1
.
TTL/ECL—
Pushbutton
switch
selects
the
deflection
factor
range
and
preset
threshold
to
be
compatible
with
either
TTL
or
ECL
logic
families
of
the channel
selected
by
controls
listed under
number
6'.
THRESH
—
Pushbutton
switch
activates
the
LEVEL
pushbuttons
and
SWITCHING
THRESHOLD
VOLTS
display, allowing
operator
to
set
the
threshold
voltage
of
the
channel
selected
by
controls
listed
under
number
61
.
ALT/CHOP
—
Pushbutton
switch,
determines
whether
the
displayed
channel(s) are displayed
alternately,
after
each
sweep
of
the time
base,
or are displayed
simultaneously
in
a
chopped
mode.
TRIG
VIEW—
Pushbutton
to
display
TRIGGER
FUNCTION
output
signal
or EXT
CLOCK
signal
on
crt.
1PROG CHAN/TRIG must be set to CHAN.
