Keysight FieldFox B Series User Manual page 571

Power Meter (USB/LAN) Mode - Option 302
Troubleshooting
The LEDs may turn on and off during the reconnection, and the sensor may report "Zeroing" or
"Attempting to connect" messages. This reconnection attempt could take up to a minute or so.
The data acquisition will resume once the connection is re-established.
Keysight N9938-90006 User's Guide
b. The PWR LED will turn off when the Sensor is ready to be
reconnected. The other LED next to it should be off as well.
c. Then press, Meas Setup 4 >
Reconnect.
More LAN Sensor Settings
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