Operating
Instructions—7A42
®
The
following
controls,
connectors,
and indicators
are
common
to
CH1,
CH2, CH3,
and
CH4.
Input
Connector—BNC
for
signal
connection.
POSITION
—
Vertically
positions
the
incoming
signal.
Clockwise
rotation
moves
displayed
trace
upward.
DISPLAY—
When
DISPLAY
indicator
light
is
on,
channel
is
selected for
display.
ECL/TTL—
When
indicator light
is
on
the
preset threshold
voltage
and
range
of
deflection
factors
are
compatible
with TTL
logic levels;
when
off
they
are
compatible with
ECL
Logic
levels.
GND—
When
indicator light is
on,
the amplifier
input
is
grounded
and
the
input
signal
is
electrically
disconnected
from
the
amplifier.
50Ω/1MΩ
—
When
indicator
light
is on,
the
input impedance
is
one
megohm,
15
picofarads;
when
off,
input impedance is 50Ω.
GAIN—
Screwdriver
control adjusts
display
gain
of
channels
CH1,
CH2,
CH3,
and
CH4.
®
CH1,
CH2, CH3,
and CH4—
Operate
in
either
the
PROG
CHAN
or the
PROG
TRIG
modes.
In
the
PROG
CHAN
mode
the
self-cancelling
pushbutton
switches
determine
which
channel
is
affected
by
the
controls
listed
under
number 21
In
the
PROG
TRIG
mode
the
CH1
through
CH4
pushbutton
switches
determine
which
channel is
programmed
into
the
TRIGGER FUNCTION,
as
selected
by
the
controls listed
under
number
®
CLEAR—
Pushbutton switch
clears
the
programmed
TRIGGER
FUNCTION
selected
by
the
controls
listed
under
102.
AND,
OR, NOT—
Pushbutton
switches
used with
controls
listed
under
number
6
to
program
the
TRIGGER FUNCTION
selected
by
the
controls
listed under
1
.
EDGE—
Pushbutton
selects
edge
sensitivity
for
the
channel
being
programmed
into
the
TRIGGER
FUNCTION
1
PROG
2PROG
CHAN/TRIG
must be set to CHAN.
CHAN/TRIG must be set to TRIG.
2-11