Product Firmware Updates; Instrument Errors - Keysight Technologies 34959A Service Manual

4 Troubleshooting and Diagnostics

Product Firmware Updates

As new product features and enhancements become available, you can easily
update your mainframe and plug-in module firmware to ensure optimum
compatibility. The latest firmware updates are available from the Keysight 34980A
product page at www.Keysight.com/find/34980AUpdates.
Front Panel Operation: Utility > FIRMWARE > UPDATE
Once you have downloaded the latest mainframe firmware (see above),
use the knob to scroll through the installed modules that require a firmware
update. To exit the menu without installing the updates, select CANCEL.

Instrument Errors

A record of up to 20 errors can be stored in the instrument's error queue. Each
remote interface I/O session (i.e., GPIB, USB, LAN, etc.) has its own
interface-specific error queue. Errors appear in the error queue of the I/O session
that caused the error. For example, if an error was generated by a command sent
over the GPIB interface, send this command from GPIB to read the error queue.
The instrument beeps once each time a command syntax or hardware error is
generated. The front-panel ERROR annunciator turns on when one or more errors
are currently stored in the error queue.
A special global error queue holds all power-on and hardware-related errors (e.g.,
over-temperature, Safety Interlock, etc.).
Errors are retrieved in first-in-first-out (FIFO) order. The first error returned is the
first error that was stored. Once you have read all of the interface-specific errors,
the errors in the global error queue are retrieved.
Errors are cleared as you read them. When you have read all errors from the
interface-specific and global error queues, the ERROR annunciator turns off and
the errors are cleared.
If more than 20 errors have occurred, the last error stored in the queue (the most
recent error) is replaced with -350, "Error queue overflow". No additional errors
are stored until you remove errors from the queue. If no errors have occurred when
you read the error queue, the instrument responds with +0, "No error".
The front panel reports errors from all I/O sessions as well as the global error
queue. To read the error queue from the front panel, use the View key.
78 Keysight 34980A Service Guide