Display Control - Agilent Technologies 34420A User Manual

Chapter 3 Features and Functions
System-Related Operations

Display Control

To speed up your measurement rate, or for security reasons, you may
want to turn off the front-panel display. From the remote interface, you
can also display a 11-character message on the front panel. See page 43
for information about the number of digits displayed.
When the display is turned off, readings are not sent to the display
and all display annunciators except 'ERROR' and 'Shift' are disabled.
Front-panel operation is otherwise unaffected by turning off the
display.
The display state is stored in volatile memory; the display is enabled
when power has been off or after a remote interface reset.
You can display a message on the front panel by sending a command
from the remote interface. The meter can display up to 11 characters
of the message on the front panel; any additional characters are
truncated. Commas, periods, and semicolons share a display space
with the preceding character, and are not considered individual
characters. When a message is displayed, readings are not sent to the
display.
Sending a message to the display from the remote interface overrides
the display state; this means that you can display a message even if
the display is turned off.
Front-panel operation: set the display state under the 5: DISPLAY
command in the SYStem menu.
The display always turns on for menu operation; this means that even
when the display is turned off, you can still operate the menu.
Remote operation: use the following commands to control the
display:
DISPlay {OFF|ON}
DISPlay:TEXT < quoted string >
DISPlay:TEXT:CLEar
The following statement shows how to display a message on the front
panel from a Hewlett-Packard controller.
OUTPUT 722; "DISP:TEXT 'HELLO'"
94
disable/enable the display
display the string
enclosed in quotes
clear the message in the
display