Tektronix 2247A

Controls, Connectors, and Indicators
VERT—Selects the trigger signal from the displayed waveforms.
The TRIGGER MODE and VERTICAL MODE switch settings determine
the
trigger
signal
source
selection.
When
VERT
Is
selected,
one
or
more
of
the
SOURCE
lights
will
be
on
to
Indicate
the
trigger
signal
source.
See
Table
2-1
for
VERT
Trigger
SOURCE
selections.
CH
1—The
signal
applied
to
the
CH
1
OR
X
input
connector
Is
the
source
of
the
trigger
signal.
Table 2-1
VERT Trigger SOURCE
Trigger
ADD
Trigger
Source
Selected
and
Mode
Vertical
Modes
AUTO
On
Algebraic
sum
of
CH
1
and
CH
2
input
LEVEL
signals.
or.
CHOP
Off
Lowest
numbered
vertical
channel
displayed.
NON-
On
Alternates
between
displayed
vertical
AUTO
or
channels
in
the
following
order:
CH
1,
LEVEL
Off
CH
2,
CH
3,
CH
4,
and
ADD,
and
ALT
CH
2—The
signal
applied
to
the
CH
2
input
connector
Is
the
source
of
the
trigger
signal,
CH
3—The
signal
applled
to
the
CH
3
Input
connector
Is
the
source
of
the
trigger
signal.
CH
4—The
signal
applied
to
the
CH
4
input
connector
Is
the
source
of
the
trigger
signal.
LINE—The
triggering
signal
is
obtained
from
a
sample
of
the
ac
Power-source
waveform.
This
trigger
source
is
useful
when
the
2247A Operators
a
ES
ia
Ed