Tektronix 2247A

id
43
Appendix A
Table A-1 (cont)
FRONT PANEL CONTROL
VERTICAL POSITION (cont)
CH 4
CH 1 and CH 2 VOLTS/DIV
CH 3 and CH 4 VOLTS/DIV
A SEC/DIV
B SEC/DIV
Menu Selection
CURSORS/TIME
POSITION
A
INTEN,
B
INTEN,
READOUT
2247A Operators
AUTO SETUP ACTION
If
selected,
ground
level
aligned
with
7th
graticule
line
(
+0.8
div)
from
top;
other-
wise
no
action.
Lowest
value
for
which
all
waveform
values
are
within
approximately
+
2
divisions
of
ground.
If
rise
or
fall
time
measurement
selected,
highest
value
that
will
display
approximately
2
4
divisions
peak-to-peak,
with
the
restriction
that
all
waveform
values
must
be
within
about
10
divisions
of
ground.
0.5
V
(times
probe
multiplier)
.
One
speed
slower
than
the
fastest
speed
that
displays
one
complete
cycle
of
the
triggering
signal
within
11
horizontal
divisions,
within
the
range
20
ms/div
to
20
ns/div.
NOTE—Depending
on
input
signal
characteristics,
if
more
than
one
complete
cycle
can
be
displayed
at
20
ns/div,
the
A
Sweep
may
be
set
to
either
50
ns/div
or
20
nsidiv.
20 ns
if
A
SEC/DIV
was
set
to
50
ns
or
20
ns
by
AUTO
SETUP;
otherwise,
two
speeds
faster
than
A
SEC/DIV.
As selected by user.
Measurement reinltialized.
40%
of
maximum
intensity
If
pot
rotation
is
less
than
28%
from
CCW
stop;
other-
wise,
as
adjusted
by
user.
A
intensity
Is
set
to
30%
If
Horizontal
Mode
Is
ALT.
NOTE—These
controls
do
not
affect
display
intensity
until
moved
through
the
point
corresponding
to
the
intensity
level
set
by
the
AUTO
SETUP.
A-3