Tektronix Keithley 2651A Reference Manual page 827

Model 2651A High Power System SourceMeter® Instrument Reference Manual
3. Navigate through the menus by turning the navigation wheel. Press the ENTER key to select the
menu items as follows: DISPLAY > TEST > DISPLAY-TESTS.
4. Turn the navigation wheel until the KEYS menu item is highlighted.
5. To start the test, press the ENTER key. When you press a key while the test is active, the label
name for that key is displayed to indicate that it is functioning properly. When you release the key,
the message No keys pressed is displayed.
6. To test the EXIT (LOCAL) key, press the EXIT (LOCAL) key once.
7. To exit the test, press the EXIT (LOCAL) key twice consecutively. You exit the test and the
instrument returns to the FRONT PANEL TESTS menu.
8. Press the EXIT (LOCAL) key multiple times to exit out of the menu structure.
Display patterns test
This test lets you verify that each pixel and indicator in the vacuum fluorescent display is working
properly.
Perform the following steps to run the display test:
1. If the instrument is in remote mode, press the EXIT (LOCAL) key once to place the instrument in
local mode.
2. Press the MENU key.
3. Navigate through the menus by turning the navigation wheel, and then pressing the ENTER key
to select the items as follows: DISPLAY > TEST > DISPLAY-TESTS.
4. Turn the navigation wheel until the DISPLAY-PATTERNS menu item is highlighted.
5. To start the display test, press the ENTER key. There are three parts to the display test. Each
time the ENTER key or the navigation wheel is pressed, the next part of the test sequence is
selected. The test sequence is as follows:
▪
Checkerboard pattern and the indicators that are on during normal operation
▪
Checkerboard pattern (alternate pixels on) and all the numeric indicators (which are not used)
are illuminated
▪
Each digit and adjacent indicators are sequenced; all the pixels of the selected digit are on
6. When finished, abort the display test by pressing the EXIT (LOCAL) key. The instrument returns
to the FRONT PANEL TESTS menu. Continue pressing the EXIT (LOCAL) key to exit out of the
menu structure.
2651A-901-01 Rev. C October 2021
Section 11: Maintenance
11-3