Keysight FieldFox B Series User Manual page 563

Power Meter (USB/LAN) Mode - Option 302
USB and LAN Power Meter Settings
How to select a Sensor Type
— Press Meas Setup 4.
— Then
Average / Peak
— Press Measure 1
— Then choose from the following:
Zeroing
The Keysight USB and LAN Power Sensors perform Internal Zeroing
automatically. Because Keysight USB and LAN Power Sensors have an internal
switch, Internal Zeroing does NOT require that the power source be turned
OFF.
For highest measurement accuracy, when measuring power levels below
–30 dBm, External Zeroing should be performed.
During External Zeroing, the power source MUST be turned OFF or the power
sensor disconnected from the power source (device under test). Power is OFF
when power sensor measurements are below –60 dBm (–50 dBm for LAN
sensors). When power higher than this is detected at the sensor, a warning
message is shown on the FieldFox and External Zeroing will not proceed.
External Zeroing is NOT allowed on the U2020 X-series Power Sensors.
How to perform External Zeroing
— Press Cal 5.
— Then
While either Internal or External Zeroing is being performed, "Zeroing..." is
shown on the FieldFox screen. While this message is present, do NOT make
any changes to the FieldFox.
Keysight N9938-90006 User's Guide
Sensor Type USB LAN
— Average Measures and reports the average of the power
measurements.
— Peak Available ONLY on some of the X-Series power sensors.
Measures and reports peak power detected at sensor input. See also,
Table 24-1, "Pulse Measurement X-Series USB and LAN Power
Sensors," on page
External Zero.
(Default = USB).
585.
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