Agilent Technologies Twelfth 4287A RF LCR Operation Manual page 112

Setting Measurement Conditions
How to Set the Measurement Point
Figure 5-10 How to change signal level setup units from dBm to V
NOTE
The setting resolution of the oscillator level is always 0.1 dB regardless of the set unit.
Accordingly, if the oscillator level is entered in V (volt) or A (ampere) units, the set value
is automatically converted with 0.1 dB resolution based on the input value.
For example, if you have entered 50 mV as the oscillator voltage level, the value is
equivalent to - 19.030... [dBm] in dBm units and the 4287A stores the settings as - 19.0
dBm. Next, the value -19.0 dBm is converted to V units and the result is 50.178... [mV]. As
a result, the displayed value will be 50.2 mV.
112 Chapter 5