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Philips PM3350A - Vertical Mode

Philips PM3350A
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4
-
2
4
APPLICATIONS
4.1.1.
VERTICAL
MODE
In
vertical
mode
the
following
adjustments
can
be
made:
-
Vertical
display
mode
selection
by
pressing
the
A/B
key.
Select
the
channel
you
want
to
see
A,
B
or
A
and
B
simultaneously.
If
the
ADD
function
is
in
use,
it
is
possible
to
switch
off
the
channels
A
and
B
(see
page
4.7).
-
Adjustment
of
the
absolute
zero
level
by
using
the
GNO
key
and
the
Y
POS
rotary
knob,
the
zero
level
can
be
positioned
anywhere
on
the
screen.
By
pressing
the
GND
key
the
input
signal
is
interrupted
and
the
input
signal
path
is
grounded.
With
the
Y
POS
rotary
knob
the
zero
level
can
be
adjusted
to
any
level
on
the
screen.
By
pressing
the
GND
key
once
again
the
signal
is
once
more
connected
to
the
input.
The
zero
level
adjustment
is
neccesary
lor
all
DC
measurements.
-
Channel
coupling
by
pressing
the
AC/DC
key.
In
AC
position
the
DC
component
of
the
measuring
signal
is
rejected.
In
DC
position
the
full
bandwidth
is
available.
AC
coupling
is
used
when
a
small
AC
signal
has
to
be
measured
that
is
superimposed
on
a
large
DC
voltage.
For
example,
noise
measurements
on
power
supply
voltages.
4.1
USE
AS
AN
ANALOG
OSCILLOSCOPE

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