Turning On/Off The Date/Time Display; Turning Off The Lcd Screen Backlight; Calibration Of The Touch Screen - Keysight E4990A Help Manual

E4990A Help
Public License version 2 copyright. Source code of VNC and a
copy of the GPLv2 may be found in the directory of
E:\OpenSource\vnc.

Turning on/off the Date/Time Display

The date/time display in the instrument status bar can be switched ON/OFF
using the following procedure.
1. Press
System
2. Click Show Clock to toggle the date/time display ON/OFF.
Refer to Change Date/Time Settings
Other topics about Setting Control Functions

Turning off the LCD Screen Backlight

You can switch OFF the backlight (illumination) of the LCD screen of the
E4990A. This extends the life of the backlight when it is used continuously
over a long period.
Turning OFF the LCD Screen Backlight
1. Press System
2. Switching OFF the backlight causes the indications on the LCD screen
to be almost invisible.
3. The backlight that has been switched OFF can be turned ON again
by pressing any key from the front panel.
Other topics about Setting Control Functions

Calibration of the Touch Screen

When you have executed system recovery on the E4990A, you have to
calibrate the touch screen. Follow the procedure described below to
calibrate the touch screen.
1. Press System
2. The touch panel device properties dialog appears. Press Calibration.
3. The touch screen calibration screen appears.
4. Touch the x mark on the upper left with your finger. The mark x also
appears on the lower left, upper right, and lower right. Touch the x
marks in that order with your finger.
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> Misc Setup > Clock Setup.
> Backlight to switch the backlight ON/OFF.
> Service Menu > Test Menu > Adjust Touch Screen.