Agilent Technologies E4406A manual Instrument Power-OnProblem, LAN Communication Problem

If You Have a Problem

Problem Symptoms and Solutions

Measurement Keys Do Not Appear after Pressing the Mode Key

Symptom: After pressing the MODE key, you have selected a particular mode (like Basic, Service, or one of the measurement personalities), but the menu for the mode you have selected does not appear on the softkeys.

Solution: If you were already in the mode that you selected, you must press the MEASURE key to display the available measurements.

Instrument Power-On Problem

Symptom: The instrument will not power-on. The instrument is plugged in, but the green LED above the front panel power switch is not on. The yellow standby LED may be flashing or may be extinguished. Something appears to be causing the instrument power supply to shut down.

Solution: An external device or internal assembly is causing the instrument to shut down, or the power supply may be in thermal shutdown. Inspect the instrument to ensure that it is receiving adequate air flow. Disconnect all devices from the rear panel and remove anything connected to the front panel probe power jack. If after powering the instrument off, the instrument powers on, determine which device caused the problem.

LAN Communication Problem

Symptom: You cannot communicate with the instrument over the LAN.

Solution: Make sure the correct IP address, subnet mask, and host name are stored in the instrument. Press System, Config I/O, then read the IP address, subnet mask and host name which are shown on the corresponding softkey labels. The default subnet mask of 255.255.0.0 should be sufficient for most closed network applications. If the Restore Sys Defaults key has been used recently, the IP address, subnet mask, and host name will have been reset to factory defaults. (The IP address is changed to 10.10.10.10., the subnet mask is changed to 255.255.0.0., and the host name is set to VSA.)

Instrument Keyboard is Locked

Symptom: The keyboard is locked and does not respond to attempts to activate features.

Solution: A programmer can lock the keyboard remotely using the SCPI KLOCk command. You can confirm if this is the reason the keyboard is locked by examining the annunciator bar; a message saying Klock will appear if this command has been executed.

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