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Section
IV
Model
3455A
TEST
OSCILLATOR
DIGITAL
VOLTlieTER
PROCEDURE:
Apply
accurate
dc
voltage
II
V
or
3
V)
from
DC
Starulard to
Thermal
Converter
and
adjust
DC
Differential
Voltmeter
for
null.
Disconnect the
DC
Standard
and
apply
the Test
Oscillator
output
to
both
the
Thermal
Converter
and
the
34S5A.
Adjust
the Test
Oscillator
output
level
for a null indication
on
the
DC
Differential
Voltmeter. This
makes
the
rms
value of the
ac input
to the
3455A
equal
to
the
highly accurate
output
of the
DC
StarKfard.
Repeat
this
procedure each time
the Test
Oscillator
frequency
is
changed.
Figure
4-3.
AC/DC
Thermal
Transfer
Measurement
(Altarnete
Frequency Response
Test).
a.
Set the
3455A
controls
as follows:
FUNCTION
ACV
RANGE
1
V
GUARD
ON
INPUT SELECT
FRONT
b.
Set the
AC
Calibrator
for
an
output of
1
V,
30
Hz
(745A
1
V
range).
Set
the
AC
Calibrator's error
measurement
control to
offset
the
1
V, 30
Hz
error
in-
dicated
on
the calibration chart
(745A
0.
1
error range).
c.
Connect
the
output of
the
AC
Calibrator
to
the
3455A
front
panel
INPUT.
d.
1
.
Standard
Model
34S5A:
The 3455A
1
V.
30
Hz
reading should
be
within the Test Limits
listed
in
Table
4-4.
2.
3455A
Option
001:
The 3455A
1
V, 30
Hz
(ACV)
reading should
be
within the Test Limits
listed in
Table
4-6.
e.
1.
Standard
Model
34SSA: Using
the
AC
Calibrator,
verify
the
34SSA
ac voltmeter
ac-
curacy
for
each
Test
Frequency, Input
Level
and 3455A Range
listed
in
Table
4-4.
The
3455A
display readings
should be
within the
Test Limits given
in
the
table.
2.
34SSA
Option
001:
Using
the
AC
Calibrator,
verify
the
345SA
ac voltmeter accuracy
for
each
Test
Frequency
(ACV),
Input Level
and 3455A
Range
listed in
Table
4-6.
The 34SSA
display
readings
should be
within the Test Limits given
in
the
table.
f.
Set the
3455A
FUNCTION
to
FAST ACV.
g.
1.
Standard
Mode)
34SSA: Using
the
AC
Calibrator,
verify
the
3455A
ac voltmeter
ac-
curacy
(Fast
ACV)
for
each
Test
Frequency
above
10
kHz,
each Input Level
and
345SA
Range
listed
in
Table
4-4.
The 3455A
display
readings
should be
within the Test Limits given
in
the
table.
2.
34S5A
Option
001:
Using
the
AC
Calibrator,
4-6
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