These tests require the calibrated values of the attenuators listed in Table 1-3 . The attenuation
values (referenced to 0 dB setting) are required in the calculation sheet. The attenuation
values used in the tests are listed in each calculation sheet.
Table 1-3. Calibration Data Required for HP 8496G Opt. 001 and H60
Frequency Attenuation Uncertainty
50 MHz 0dB
0.0037 dB
10 dB
0.0042 dB
20 dB
0.0046 dB
30 dB
0.0052 dB
40 dB
0.0079 dB
50 dB
0.0125 dB
60 dB
0.0144 dB
70 dB
0.0327 dB
80 dB
0.0532 dB
90 dB
0.0543 dB
100 dB
0.0850 dB
The calibration uncertainty is the primary source of measurement error in performance tests
.
The measurement uncertainties listed in the performance test record of Chapter 4 are valid
only when the uncertainty of the step attenuation data satises that given in the third column
of Table 1-3 .
The calibration of step attenuators, HP 8496G Opt. 001 and H60, are available at
Hewlett-Packard. For information about the calibration and the available uncertainties
, contact
your nearest Hewlett-Packard service center.
Note
The HP 8496G Opt. 001 and H60 programmable step attenuator has four
attenuation segments, 10 dB segment, 20 dB segment, and two 40 dB segments
.
Each attenuation from 10 dB to 70 dB is obtained by combining these segments
.
The attenuations from 40 dB to 70 dB depend on the 40 dB segment that is
used.
When setting the step attenuator for the calibration, specify one of the 40 dB
segments for attenuations from 40 dB to 70 dB. Then use the specied segment
in the tests.
General Information 1-7
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