HP 339A - RMS Accuracy and Filter Accuracy Tests

Section
IV
Model
339A
a.
Set
the
339A
controls
as
follows:
FUNCTION
INPUT
LEVEL
FILTERS
OFF
(out)
METER
RESPONSE
VU
INPUT
RANGE
IV
INPUT/GND
SELECT
....
DIS.
AN./J_
(center
position)
b.
Set
the
AC
Calibrator
controls
for
an
output
of
1 V,
b.
Connect
the
equipment
as
shown
in
Figure 4-3.
c.
Adjust
the
pulse
generator
for
a
10 V
peak-to-peak
positive
pulse
with
a
repetition
rate
of 1
kHz
(as
observed
on
the
oscilloscope).
d.
Adjust
the
Pulse
Geneator
symmetry
until
the
true
RMS
voltmeter
indicates
3.00 V
rms.
NOTE
c.
Set
the
True
RMS
Voltmeter
to
read
AC
Volts
on
the
1 V
range.
d.
Connect
the
equipment
as shown
in
Figure
4-2.
4^-
The
339A 1 V
meter
indication
and
MONITOR
output
level
should
be
within
the
Test
Limits
listed
in
Table
4-2.
The
pulse
generator
amplitude
and
symmetry
controls
may
interact.
Repeat
adjustments
as
necessary
to
obtain
a true
rms
meter
indication
of
3
V
and
an
oscilloscope
presentation
of
10
V
peak-to-peak.
e.
The
339A
meter
indication
must
be
3
volts ±
.06
volts.
f.
Using
the
AC
Calibrator,
verify
the
339A
meter
accuracy
and
MONI
TOR
output
accuracy
for
each
input
level
listed
in
Table
4-2.
Table
4-2.
Meter
Tracking
and
MONITOR
Output
Accuracy
Tests.
Input
Level
Meter
Indication
Monitor
Output
Level
1.0
V
98
-
1.02
.95
-
1.05
.9 V
88
-
92
85
95
.8 V
.78
-
82
.75
-
.85
.7 V
68
-
.72
65
-
.75
.6 V
.58
-
.62
.55
-
.65
.5
V
.48
-
.52
.45
-
55
|
.4
V
.38
-
.42
.35
-
.45
F
.3 V
.28
-
.32
25
-
.35
.2
V
.18
-
22
.15
-
.25
.1 V
.08
-
.12
.05
-
.15
4-13.
RMS
Accuracy
(crest
factor)
Test.
Equipment
Required:
Pulse
Generator
(-hp-
Model
8011
A)
True
RMS
Voltmeter
(-hp-
Model
3403C)
Oscilloscope
(-hp-
Model
1221
A)
a.
Set
the
339A
controls
as
follows:
FUNCTION
INPUT
LEVEL
FILTERS
OFF
(out)
METER
RESPONSE
VU
INPUT
RANGE
'
3 V
INPUT/GND
SELECT
....
DIS.
AN.LL
(center
position)
f.
Change
the
Pulse
Generator
repetition
rate
to
100
Hz.
Readjust
the
amplitude
and
symmetry
as
necessary
to
obtain
a true
RMS
meter
indication
of
3 V
and
a 10
V
peak-to-peak
oscilloscope
presentation.
g.
The
339A
meter
indication
must
be
3
V
±
.06
volts.
h.
Change
the
Pulse
Generator
repetition
rate
to 10
k Hz.
Readjust
the
amplitude
and
symmetry
as
necessary
to
obtain
a True
RMS
meter
reading
of
3
V
and
a 10 V
peak-to-peak
oscilloscope
presentation.
i.
The
339A meter
indication
must
be
3 V
± .12
volts.
4-14.
Filter
Accuracy
Test.
Equipment
Required:
Spectrum
Analyzer
(-hp-
Model
3044A)
a.
Set the
339A
controls
as
follows:
FUNCTION
INPUT
LEVEL
FILTERS
OFF
(out)
METER
RESPONSE
VU
INPUT
RANGE
IV
INPUT/GND
SELECT
....
DIS.
AN./_L
(center
position)
b.
Connect
the
equipment
as shown
in
Figure 4-4.
c.
Set
theSynthesizer
(3330B)
output
frequency
to
400
Hz
and
adjust
the
output
level
for
a
full-scale
meter
reading
on the
339A.
d.
Set the
Spectrum
Analyzer
(3571
A)
controls
for
an
input
impedance
of
1
Mf2
.
an
input
range
of
+
10 dB V,
a
bandwidth
of
3 Hz
and
a relative
display
reference.