Power Meter Operation 2
E4418B Power Meter User’s Guide 59
Setting the Units of Measurement
The “dBm/W” menu is used to select the measurement units on the
currently selected window. These can either be logarithmic (dBm or dB) or
linear (Watt or %) units.
sets the measurement units to dBm
(logarithmic units). Table 2- 5 shows which units are applicable to the
individual measurement modes.
Press , then select the unit of measurement from , , ,
or . Softkeys which cannot be selected in your particular mode of
operation appear with their text grayed out.
Tab l e 2 - 5 Measurement Units
When the unit of measurement is set to Watt, it is possible that negative power
measurements may be displayed when measuring low power levels.
Measurement Mode Relative Mode Off Relative Mode On
1
1 When relative mode is on (that is, , is “On”), the measurement is com-
pared to a reference value.
Linear Log Linear Log
Single Channel Watt dBm % dB
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