Relative And Offset Power Measurements; Display Units; Resolution - Keysight N9912A User Manual

Power Meter Mode (Option 302)
Power Meter Settings

Relative and Offset Power Measurements

Power measurements can be made that are relative to another reading or that
are offset by a fixed value.
— Use Relative to measure the difference between power levels.
— Use Offset to account for components or a long length of cable that is used
before the power sensor. For example, if using a 10 dB attenuator to protect
the FieldFox, enter an Offset Value of 10 to read the power as it would
appear without attenuation. If using a 10 dB amplifier, enter an Offset Value
of –10 to read the power as it would appear without amplification.
How to set Relative and Offset Power Measurements
— Press Scale / Amptd.
— Then choose from the following:

Display Units

Select whether to display power in dBm or Watts. When making relative power
measurements, these change to dB and %.
How to set Power Meter display units
— Press Meas Setup 4 or Scale / Amptd.
— Then Unit.
— Then choose from the following:

Resolution

Resolution sets the number of digits to display after the decimal point on the
digital power meter display.
11- 6
— Relative Off On When switched to ON, the FieldFox measures and
stores the current power level. Subsequent power measurements
display a power level which is relative to the stored value. When
relative is ON, the units change from dBm to dB or from Watts to %.
— Offset Off On Toggles ON and OFF the displayed power level using
the Offset value.
— Offset Val Value by which the power meter display is offset. A
positive value compensates for a component with loss. A negative
value compensates for a component with gain. Offset values are
limited to +/- 100 dB.
— dBm (dB) Sets Power Meter display to dBm or dB.
— Watt (%) Sets Power Meter display to Watts or %.
Keysight N9912-90001 User's Guide