Agilent Technologies E4419B, User Manual

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2 Power Meter Operation
62 E4419B Power Meter User’s Guide
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.
Table 2-5
Measurement Units
dBm W dB %
N O T E
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
compared to a reference value.
Linear Log Linear Log
Single Channel Watt dBm % dB
Ratio % dB % dB
Difference Watt dBm % dB
Rel Off On