HP 8642A - Page 138

Operation
Model 8642A/B
Modulation, AM (cont'd)
Maximum
AM Depth
(Dfo)
99.9
97.2
95.0
92.8
90.5
88.4
86.2
84.1
82.0
79.9
77.8
75.8
73.8
71.8
69.8
67.9
66.0
64.1
62.2
60.3
58.5
56.7
54.9
53.1
3-102
HP-IB. Sequence Dependency
AM settings are sometimes coupled with Attenuator Range Hold (Special Function 9)
or amplitude settings. Therefore, HP-IB codes may need to be entered in a particular
sequence when accessing combinations of these functions. Refer to the discussion
about Sequence Dependency, which begins on page 3-12 in the HP-IB portion of this
Section III.
Maximum Combinations of Amplitude and AM
When amplitude settings exceed +14.0 dEm (1.l2V, 121.0 dBuV, 2.25 EMF V, and
127.0 dB EMF uV), the AM depth setting is limited to those settings listed below m
Table 3-18.
Table 3-18. Limitations on AM Settings with Amplitude (1 of 2)
Amplitude
dBm V
dB Jl.V
EMFV
dB EMF Jl.V
-140.0 to 14.0 0.000023 to 1.12 -33.0 to 121.0 0.000046 to 2.25 -27.0 to 127.0
14.1 1.14 121.1
2.29 127.1
14.2
1.15
121.2
2.31 127.2
14.3 1.16 121.3
2.33 127.3
14.4
1.18 121.4
2.37 127.4
14.5 1.19
121.5
2.39
127.5
14.6
1.20
121.6
2.41 127.6
14.7 1.22 121.7
2.45 127.7
14.8 1.23
121.8
2.47
127.8
14.9 1.25 121.9
2.51 127.9
15.0 1.26 122.0
2.53 128.0
15.1 1.27
122.1 2.55 128.1
15.2 1.29 122.2 2.59 128.2
15.3
1.30
122.3 2.61 128.3
15.4 1.32 122.4 2.65
128.4
15.5 1.33 122.5
2.67 128.5
15.6 1.35 122.6 2.71
128.6
15.7 1.37
122.7 2.75 128.7
15.8 1.38 122.8 2.77
128.8
15.9
1.40
122.9
2.81 128.9
16.0 1.41 123.0
2.83 129.0
16.1 1.43 123.1 2.87 129.1
16.2 1.45
123.2 2.91
129.2
16.3 1.46
123.3
2.93
129.3