Agilent Technologies U2000 Series, Operating And Service Manual

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1 Getting Started
4 U2000 Series Operating and Service Guide
LED Indicator Guide
The LED indicator is found at the rear panel of the power sensor. The
following table shows the states of the LED indicator and its description.
Table 1-1 States of LED indicator and its description
LED indicator Description
GREEN blinking Device in communication mode.
Example: Sending SCPI commands or reading data.
RED blinking Error - Highest priority event
The error is due to HW/OS/Self-test. All other LED indicators will
not function while having this error. The error message can be read
by sending SYST:ERR? command. Users are advised to return the
power sensor to Agilent.
RED Error. Use SYST:ERR? to read the error message. Reading the error
message will also clear the LED indication. Users are advised to read
the message as some of the error might cause measurement errors.
Example of error cause:
1 SCPI command syntax error
2 Invalid Zero
AMBER Zeroing is in progress.
Sending SCPI commands during the zeroing process will cause error.
This will cause the LED indicator to turn RED.