User`s guide

Agilent E6432A Microwave Synthesizer User’s Guide 2-5

Hardware Front Panel Connectors

Failed LED

Failed LED, available from the Hardware Front Panel, indicates a

failed power-on self test or that a hardware failure has occurred.

Indications include the following:

• Power-on self test failure

• Assist processor unable to execute or its watchdog timer firing

• Fractional-N synthesizer (Parent loop) unlock

• Microwave PLL unlock

• 100 MHz reference unlock (when internal reference is selected)

• ALC high and low unlevel (when internal leveling is selected)

• Failure of internal calibration

• Failure of diagnostic test

This Failed LED remains illuminated until the user performs an

initialization, and the synthesizer passes the power-on self-test with

none of the above failure conditions being indicated.

TIP To help identify any of the above failures:

❏ Using the Soft Front Panel, refer to the procedure on how “To

Display a List of the Synthesizer’s Error Queue Messages” on page

3-113.

❏ Using the VXIplug&play commands, use the HPE6432_error_query

command.