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PERFORMANCE
CHECK
Introduction
All
performance
checks
are
carried
out
without
removing
the
instrument
covers.
The
procedures
in
this
section
verify
that
the
instru-
ment
performance
satisli€s
the
performance
require-
rnents
specified
under
the
performance
Requirement
column
in
Section
2,
Specification.
Some
parameters
and
instrument
functions
that
are
not
explicitly
specified
are
also
checked.
These
checks
verify
that
the
instrument
performs
as
described.
Checks
should
be
performed
in
sequence
because
som€
tests
rely
on
the
satisfactory
performance
of
related
circuits.
Also,
the
cneck
iteps
have
been
arranged
so
that
the changing
of
test
equipment
setups
from
one
step
to
the
next
is
minimized.
lf
a
measurement
is
marginal
or
below
specification,
an
adjustment
procedure
to enhance
performance
will
be
found,
under
a similar
treading,
in
Section
5,
Adjust-
ment
Procedure.
After
adjustment,
recheck
the
perfor_
mance.
Adjust
only
those
circuits
that
do not
meet per-
formance
criteria.
lf adjustment
fails
to
return
the circuit
to
specified
performance,
refer
to
the
Maintenance
section
for
troubleshooting
and
repair
procedures.
Incoming
Inspection
Test
The
Operators
manual
contains
an operational
or
functional
check
that
checks
all
functions.
This
eheck
is
recommended
for
incoming
inspections
because
it
requires
no
external
equipment
or
special
expertise
and
is
a reliable
indication
that
the
instrument
is
perforrning
properly.
Option
Instrument
Checks
.
Whenever
practical,
performance
checks
for
option
instruments
are
integrated
in
the
performance
check
steps
for
the
standard
instrument,
otherwise
special
check-steps
are provided
under
OPTION
INSTRU-
MENTS
towards
the
back
of
this
section.
o
o
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
Secton
4
-
4g4Al494Ap
Service
Vol.
1
Verification
of
Tolerance
Values
Compliance
tests, of
those limits
listed
in
the
p€rfor-
mance
Requirement
column
of
the
instrum€nt
specifications,
shall
be
perform€d
after
sufficient
warm-
up
time and
comptetion
of
preliminary
pr€paration
steps
(such
as
front-panel
adjustments).
Measurement
tolerance
of
test eguipment
should
be
negligible
in
comparison
to
the
specified
tolerance;
and,
when
not
negligibte,
the error
of
the
measuring
apparatus
shall
be
added
to the
tolerance
specified.
History
Information
The
instrument
and
manual
are
periodically
evaluated
and
updated.
lf
modifications
require
changes
in
the
procedures,
information
applicable
to
earlier
instruments
wil
be
included
within
a step
or as
a
sub-part
to
a step.
Equipment
Required
Table
4-1
lists
the test equipment
and
calibration
fixtures
recommended
for
the
performance
Check,
This
equipment
is also
applicable
for
the
adjustment
pro_
cedures
in
Section
5,
Adjustment
procedure.
The
equipment
characteristics
specified
are
the minimum
required
for
the checks.
Substitute
equipment
must
meet
or
exceed
these
characteristics.
These
fixtures
are
available
from Tektronix,
Inc.,
and may
be
ordered
through
your
local
Tektronix
Field
Office or representa-
tive.
Some checks
may
not
be
practical
because
they
may
require
sophisticated
test equipment
and/or
pro-
cedur€s.
In
those
cases, a
compromise
may be
made
in
the
procedures.
When
that occurs,
a statement
or
footnote
to that fact
is added
to the
step.
The more
exact
method
of
measuring
the
characteristic
can
be
supplied
by
your
Tektronix
Service
Center.
4-1