2 Operating Information
48 Keysight 3458A Assembly-Level Repair Manual
The display shows:
You can now use the Menu Scroll keys (up or down arrow keys} to step through
the menu in alphabetical order (down arrow key) or in reverse alphabetical order
(up arrow key). For example, starting with the TARM display shown above, by
pressing the down arrow key once, the display shows the next command in
alphabetical order (TBUFF). (You can also press and hold the up or down arrow
key to rapidly step through the menu.) Once you have found the desired
command, you can press the Enter key to execute it immediately (using default
parameter values if applicable). If you need to specify command parameter(s),
with the command displayed, press the right arrow key or the comma key (or, if
the first parameter is numeric, a numeric key). This selects the command and
allows you to specify or select parameter(s) using the procedures described earlier
in this section.
There are two alphabetic menus available: FULL and SHORT. You can select
between these menus using the shifted Menu key. The specified menu choice is
stored in continuous memory (not lost when power is removed). The FULL menu
contains all commands except query commands that can be constructed by
appending a question mark to a command (e.g., BEEP, BEEP?). (Query commands
are discussed next.) The SHORT menu eliminates the GPIB bus-related
commands, commands that are seldom used from the front panel, and any
commands that have dedicated front panel keys (e.g., the NPLC key or the Trig
key).
Query commands
There are a number of commands in the alphabetic command directory that end
with a question mark. These commands are called query commands since each
returns a response to a particular question. For example, access the LINE? query
command from the command menu and press the Enter key. The multimeter
responds to this query command by measuring and displaying the power line
frequency. (Use the right arrow key to view the entire response.) As another
example, access the TEMP? command from the command menu and press Enter.
This command returns the multimeter's internal temperature in degrees
Centigrade.
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