Relative And Offset Power Measurements - Keysight FieldFox B Series User Manual

Power Meter (USB/LAN) Mode - Option 302
USB and LAN Power Meter Settings
Using Autoscale, the current reading is used for the center of the scale, and
Min and Max values are set accordingly.
— Press Scale / Amptd.
— Then Autoscale.
Source Power Measurements
Before making a source power measurement, a calibration is required. Requires
a compatible USB power sensor. Learn more about supported Keysight USB
and LAN Power Sensors, please visit:
www.keysight.com/find/usbsensorsforfieldfox.
How to make a Source Power Measurement
— Press Measure 1 >
— Follow the Source Power Measure Wizard's instructions.
— Press
— Press

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
How to set Relative and Offset Power Measurements
— Press Scale / Amptd.
— Then choose from the following:
566
Src Power Measure
wizard.
When you select the Src Power Measure
and the Average (default) is disabled. And, the displayed power meter is
replaced by a Power vs. Frequency grid display of the source and receiver
power.
Src Power Memory
Gain - applies the stored source power measure
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.
— Relative Off On
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 %.
to open the Source Power Measure
softkey the
- to store the source power measurement
When switched to ON, the FieldFox measures and
Keysight N9938-90006 User's Guide
Rx Power is enabled