How to Measure Power Power Measurement
Agilent 8163A Lightwave Multimeter, Agilent 8164A Lightwave Measurement System, & Agilent 8166A Lightwave
Multichannel System, Fourth Edition
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Figure 52 shows the possible range values you can choose. These values range
from 10 dBm (upper power limit of 13 dBm) to −70 dBm (upper power limit of
−67 dBm) in 10 dBm increments.
Upper Power Limit and Resolution
Table 1 shows the upper power limit and measurent resolution at various power
ranges. As can be seen the resolution decreases as the chosen [Range] decreases.
The resolution is always 40 dBm less than the chosen [Range] value. The Upper
Power Limit is always 3 dBm greater than the chosen [Range] value.
Figure 52 Range Value Menu
Table 1 Upper Power Limits and Resolution for Various Power Ranges
[RANGE] Upper Power Limit Resolution
10 dBm 19.999 mW 13.000 dBm 0.001 mW −30.000 dBm
0 dBm 1.9999 mW 3.000 dBm 0.1 µW −40.000 dBm
−10 dBm 199.99 µW −7.000 dBm 0.01 µW −50.000 dBm
−20 dBm 19.999 µW −17.000 dBm 0.001 µW −60.000 dBm
−30 dBm 1.9999 µW −27.000 dBm 0.1 nw −70.000 dBm
−40 dBm 199.99 nW −37.000 dBm 0.01 nw −80.000 dBm
−50 dBm 19.999 nW −47.000 dBm 0.001 nw −90.000 dBm
−60 dBm 1.9999 nW −57.000 dBm 0.1 pW −100.000 dBm
−70 dBm 199.99 pW −67.000 dBm 0.01 pW −110.000 dBm
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