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6.
CH
1 OR X
and
CH
2 OR
Y-lnput
connectors
for
application
of
external signals to the inputs
of
the vertical
amplifier.
In
the
X-Y
mode
of
operation, the signal
connected
to
the
CH 1 OR X
connector
provides
horizon-
tal
deflection
and the signal connected
to
the CH 2 OR Y
connector
provides vertical deflection.
7.
AC-GND-DC-Selects
the method used
to
couple
a
signal
to
the
input
of
the vertical amplifier. In the
AC
position,
signals are capacitively
coupled
to the vertical
amplifier.
The
de
component
of
the
input
signal is blocked.
In
the
GND
position,
the
input
of
the vertical
amplifier
is
disconnected
from
the
input
connector
and
grounded
to
allow
the
input
coupling
capacitor
to
precharge. In the DC
position,
all
components
of
the
input
signal are passed to
the
input
amplifier.
8.
VERT
MODE-Selects
mode
of
operation
for
ver-
tical
amplifier
system.
CH
1:
Channel
1
only
is displayed.
ALT: Provides dual-trace display
of
the signals
of
both
channels. Display
is
switched between channels at the end
of
each sweep. Useful at sweep rates faster than
about
50
microseconds/division.
ADD: Signals applied to the
CH
1 and CH 2
input
connectors are algebraically added, and the algebraic
sum
is
displayed on the crt.
The
INVERT switch in Channel
2 allows the display to be CH 1 plus CH 2
or
CH 1
minus
CH
2.
Useful
for
common-mode
rejection
to
remove an
undesired signal
or
for
de offset.
CHOP: Provides dual-trace
display
of
the
signals
of
both channels. Display is switched between channels
at
a
repetition rate
of
approximately 250 kHz. Useful at sweep
rates slower than about 50
microseconds/division,
or
when a dual-trace, single-sweep
display
is required.
CH
2:
Channel 2
only
is
displayed.
It
must be selected
in X-Y operation.
9.
20
MHz BW/TRIG
VIEW-Dual-purpose
switch
that
limits the bandwidth
of
the vertical
amplifier
system
to
approximately
20
MHz when pulled,
or
when pressed,
causes the signal applied to A
Trigger
Generator
to
be
displayed on the crt.
10.
INVERT-Channel
2
display
is
inverted in the
INVERT (button in) position.
@
466/464 DM44 Operators
5
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