Section
4-2445A/2455A
Service
PERFORMANCE CHECK AND FUNCTIONAL
VERIFICATION PROCEDURE
INTRODUCTION
This procedure is used to verify proper operation of
instrument controls
and
to check the instrument's perfor-
mance
against the requirements listed
in
the
• Specification· (Section 1
).
This procedure verifies instru-
ment function
and
may
be
used to determine
need
for
readjustment. These checks may also
be
used
as
an
acceptance test
and
as
a preliminary troubleshooting
aid.
Removing the wrap-around cabinet
is
not necessary to
perform this procedure.
All
checks
are
made using the
operator accessible front-
and
rear-panel controls
and
connectors.
Within the procedure, steps to verify proper operation
of
an
instrument control or function that is not specified
in
the "Specification· section
begin
with the word "VERIFY".
These functions ARE
NOT
specifications
and
should not
be
interpreted
as
such. Steps to check performance
specifications
begin
with the word "CHECK".
PREPARATION
Test equipment items 1 through 18 listed
in
Table
4-1
are
required to perform this procedure. The specific pieces
of equipment required to perform the checks within
each
section are listed at the beginning of that section.
The
item
numbers
in
parenthesis next to
each
piece
of
equipment
refer to the numbered equipment list of Table
4-1
. Items
19 through 23
are
used
only for instrument calibration (see
the Adjustment Procedure
in
Section
5).
Before performing this procedure, ensure that the LINE
VOLT
AGE
SELECTOR switch
is
set for the
ac
power
source
being
used (see "Preparation for Use·
in
Section
2).
Connect the instrument to
be
checked
and
the test
equipment to
an
appropriate power source. Turn the
instrument
on
and
ensure that
no
error message is
displayed
on
the CRT. If
an
error message is present,
have the instrument repaired or calibrated by a qualified
service technician before performing this procedure.
The
procedure
is
divided into sections to permit func-
tional
and
performance verifications of individual sections
of the instrument without performing the entire procedure.
Perform
all
steps within a section, both
in
the sequence
presented
and
in
their entirety, to ensure that control set-
tings
are
correct for the following step.
When
performing partial procedures, the Initial Control
Settings at the first of the section should
be
set
up
first;
then make any changes noted at the first of the subsec-
tion to
be
performed. When performing the procedures
in
sequence,
merely change those controls that have
changed from the previous step.
NOTE
In
order to see a channel's
VOL
TS/DIV setting, the
channel must be selected using the VERTICAL
MODE switches.
On
instruments with Option 06 or
09
(CTT) installed:
selecting Intensified, Alternate, or B Horizontal Mode will
automatically enable the Counter/Timer/ Trigger option for
precision
Delay,
Delta Time,
and
1/Delta Time measure-
ments. Several sections
of
the Performance Verification
Procedure specify various delay settings for B Trigger
in
either the
RUN
AFTER DELAY, TRIGGERED AFTER
DELAY, or TRIG
.i
DELAY
mode.
Procedure steps involv-
ing
delay settings that the CTT option will affect have
alternate instructions listed.
4-1
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