HP 436A - Power Reference Level Test

•
•
'
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Model
436A
Performance Tests
PERFORMANCE TESTS
4-12.
CALIBRATION FACTOR TEST
(cont'd)
8.
Set
the
CAL
FACTOR% switch, in turn,
to
each position and verify
that
the
indi-
cations observed are within the limits specified in Table 4-4.
Table
4-4.
Calibration
Factor
Test
Results
CAL
FACTOR
Results
CAL
FACTOR
Results
Switch
Switch
Position
Min.
Actual
Max.
Position
Min.
Actual
Max.
100
0.994
1.006
92
1.081
1.093
99
1.004
1.016
91
1.093
1.105
98
1.014 1.026 90 1.105
1.117
97
1.025 1.037
89 1.118
1.130
96
1.036 1.048
88
1.130
1.142
95
1.047 1.059
87 1.143 1.155
94
1.058 1.070
86
1.157 1.169
93
1.069 1.081
85
1.170
1.182
4-13. POWER REFERENCE LEVEL TEST
SPECIFICATION:
Internal 50
MHz oscillator factory set
to
1
mW±
0.7%
traceable
to
the
National
Bureau
of
Standards.
DESCRIPTION:
Accuracy: ±1.2% worst case
(±0.9%
rms) for one year
(0°C
to
55°C).
The
power reference oscillator
output
is
factory adjusted
to
1
mW
± 0.
7%.
To
achieve
this accuracy, Hewlett-Packard employs a special measurement system accurate
to
0.5%
(traceable
to
the National Bureau
of
Standards) and allows
for
a transfer error
of
±0.2%
in making
the
adjustment.
If
an equivalent measurement system is employed for veri-
fication, the power reference oscillator
output
can be verified
to
1
mW
±1.9% (±1.2%
accuracy+
±0.5%
verification system
error+
±0.2%
transfer
error=
1.9% maximum
error). The power reference oscillator can be set
to
±0.
7%
using
the
same equipment
and
following the adjustment procedure in paragraph 5-22.
To
ensure maximum accur-
acy in verifying the power reference oscillator
output,
the following procedure provides
step-by-step instructions
for
using specified Hewlett-Packard test instruments
of
known
capability.
If
equivalent test instruments are used, signal acquisition criteria
may
vary
and reference should be made
to
the
manufacturer's guidelines
for
operating
the
instruments.
NOTE
The Power Meter may be returned to the nearest
Hewlett-Packard office to have the power reference
oscillator checked and/or adjusted. Refer to Section II,
PACKAGING.
4-7