Setting The Units Of Measurement; Measurement Units - HP EPM-441A User Manual

Power Meter Operation

Setting the Units of Measurement

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.
(logarithmic units). Table 2-2 shows which units are applicable to the
individual measurement modes.
Press
. Softkeys which cannot be selected in your particular mode of operation
%
appear with their text grayed out.
Note
Single Channel
1. When relative mode is on (that is,
measurement is compared to a reference value.
2-20
Preset
Local
dBm/W
, then select the unit of measurement from
When the unit of measurement is set to Watt, it is possible that
negative power measurements may be displayed when measuring
low power levels.
Table 2-2: Measurement Units
Relative Mode Off
Measurement
Mode
Watt
sets the measurement units to dBm
Linear Log
dBm
Rel
,
Rel Off On
Offset
HP EPM-441A User's Guide
, , or
dBm W dB
1
Relative Mode On
Linear Log
% dB
is "On")
, the