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Tektronix 475A - Page 13

Tektronix 475A
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5.
POSITION—Positions
the
display
vertically.
In
the
X-Y
mode,
the
CH
1
POSITION
control
positions
on
the
X
axis
(horizontally)
and
the
CH
2
POSITION
control
positions
on
the
Y-axis
(vertically),
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
ORY
connector
provides
vertical
deflection.
7.
AC-GND-DC—Selects
the
method
used
to
couplea
signal
to
the
input
of
the
vertical
amplifier.
In
the
AC
position,
signals
are
capacitively
coupled
to
the
vertical
amplifier.
The
dc
componentof
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.
Inthe
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
displav
of
the
signals
of
both
channels.
Displav
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
pius
CH
2
or
CH
1
minus
CH
2.
Useful
for
common-mode
rejection
to
remove
an
undesired
signal
or
for
dc
offset.
CHOP:
Provides
dual-trace
display
of
the
signals
of
both
channels.
Display
is
switched
between
channels
ata
repetition
rate
of
approximately
250
kHz.
Useful
at
sweep
rates
slower
than
about
50
microseconds/division,
or
when
a
dual-trace,
singie-sweep
display
is
required.
CH
2:
Channel
2
only
is
displayed.
it
must
be
selected
in
X-V
operation.
9.
100
OR
20
MHz
BW/TRIG
VIEW—
Three-purpose
switch
that
limits
the
bandwidth
of
the
vertical
amplifier
system
to
approximately
100
MHz
(first
detent)
or
20
MHz
(second
detent)
when
pulled,
or
when
pressed,
causes
the
signal
applied
to
A
Trigger
Generator
to
be
dispiayed
on
the
crt.
10.
INVERT—Channel
2
display
is
inverted
in
the
INVERT
(button
in)
position.
@
|
475A/DM44
Operators
5

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