Power Measurement How to Measure Power
98 Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
Figure 51  shows an example of the range values you can choose for the 
Agilent 81634B. Inn this case the values range from 10 dBm (upper power 
limit of 13 dBm) to −70 dBm (upper power limit of 
−67 dBm) in 10 dBm increments.
Figure 51 Range Value Menu