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(3)
Press
key sequence
0
EXP
6
SHIFT
STORE
I
X
(4)
Press
key sequence
(5)
(
6
)
SHIFT
RECALL
X
Verify that 10.000000 E
6
is
displayed.
Press
CONTIN
UE
and key
sequence
SHIFT
R-X/Z
Adjust the
internal
frequency standard
as
close
as possible to
10
MHz,
using
the
FREQ
STD ADJUST
aperture
on
the rear panel.
The accuracy
limits
are
shown
in
Table
6.4.
Verify that the value displayed
is
within
these
limits.
TABLE
6.4
Internal
Frequency Standard Accuracy
Limits
Frequency Standard
# Digits
Exp.
Standard
oscillator
±
16
0
Option
04
A
±
3
0
Option 04E
± 10
-3
(7)
Turn
off
the counter
and
disconnect the
test
equipment.
OVERALL
SPECIFICATION
CHECK
Introduction
40
Satisfactory
completion
of the following
performance
verification
procedures (PVPs)
will
confirm
that the
counter
is
functional
and meets
its
specification.
Before
beginning the specification check, ensure that the counter successfully passes
the
functional
check
provided
in
Section
2,
par.
2.9
of this
manual.
The
PVPs
should be
completed
in
the order given.
41
The
following conditions
must
be kept
throughout
the specification
check:
(1)
The
counter
must
be operated from an
AC
supply.
(2)
The
line
voltage
must
be
within the indicated range of the
line
voltage
selector.
(3)
The
instrument covers must be
installed.
6-25
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