Operating
Instructions—7A42
GET-ACQUAINTED
EXERCISES
These
Get-Acquainted
Exercises
will
help
you
become
familiar
with
the operation
of
your
7A42
and
at
the
same
time,
check
basic
instrument operation.
The
Get-
Acquainted
Exercises
are
divided
into
three parts:
Exercise 1—Preliminary
Set
Up
and
Initialization,
Exercise 2
—
Obtaining
a
Triggered
Display, and Exercise
3
—
Logic
Triggering.
NOTE
When
power is applied to
the 7A42 an
automatic self test will be
performed.
After the self test is complete the display 7A42 TEST
COMPLETE
will
appear on the crt for approximately 1 second. If a
7A42
TEST
BUSY message remains in the crt display, see the
discussion
Self-Test Failure
Messages, in this section under Detailed
Operating
Information.
EXERCISE 1
PRELIMINARY
SET UP AND INITIALIZATION
This
exercise
describes
proper
installation
of
the
7A42
into a compatible
oscilloscope
mainframe,
exercises
the
self-test
sequence
and
initializes
the
front
panel
control
settings.
PRELIMINARY SET UP
Perform
the
following
procedure
to
install
and power
up
the
7A42.
a.
Install
the
7A42
in
the
left
two
vertical
compartments
of
a
Tektronix
7000-series
oscilloscope
mainframe
(e.g.,
7104,
7904A).
b.
Set the
oscilloscope
Vertical
Mode
to
Left.
c.
Install
a
time-base
unit
in
one
of
the
two
horizontal
compartments
and
set
the
oscilloscope
mainframe
Horizontal
Mode for
the
appropriate
time
base
(A
or
B).
d.
Set
the
time-base
triggering
to
+Slope,
Auto
Mode
with
DC
Coupling
from
the
Internal
Source
and
the
Level
control
to
midrange.
e.
Set
the
time-base
Time/Division
to
1 millisecond.
f.
Set
the
appropriate
oscilloscope
mainframe
Trigger
Source
(A
or B)
to
Left
Vert.
g.
Turn
the
oscillsocope
mainframe
Power
on.
2-13