Getting Started
1
Keysight 53147A/148A/149A Operating and Programming Guide
57
Selecting the Unit of Measurement for Power
The instrument’s power meter can display values in either of two sets of units of
measurement—dB and dBm or Watts, mW,
μ
W, and nW (the power meter
automatically selects the most appropriate unit of measurement when Watts is
selected). Use the procedure in the following diagram to select the unit of
measurement for power (this procedure assumes that a signal is currently applied
to the power meter and that power is being displayed):
Display
Power
dBm/W
Shift
Ch 2
Freq
Pwr
mW
Shift
Ch 2
Freq
Pwr
dBm
Ch 2
Freq
Pwr
dBm
NOTE
If a signal having an amplitude that exceeds the Power Meter specifications is
applied, and power measurement is enabled, the annunciators for the power
reading display “HI” to indicate that the signal’s amplitude exceeds the
specification. If a signal having an amplitude below the minimum specification is
applied, the power annunciators display “LO” to indicate that the signal level is
too low to be measured by this Power Meter.
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