Agilent Technologies E4980A - Page 56

56 Chapter 4
Troubleshooting
Function Specific Troubleshooting
displayed on the LCD (Refer to Figure 4-16).
Step 12. Confirm that ADRS1-ADRS6 LEDs on the simulator turn ON in accordance with the
hexadecimal number displayed on the LCD. One of the 6 LEDs turns ON in sequence as
shown in
Figure 4-16.
Step 13. Confirm that DO0-DO7 LEDs on the simulator turn ON in accordance with the
hexadecimal number displayed on the LCD. One of the 8 LEDs turns ON in sequence as
shown in
Figure 4-16.
Figure 4-16 Bias Current Interface Function Test
Step 14. Confirm that “DI0 TO 7” and “DI8 TO 15” on the LCD of the E4980A display
hexadecimal number “ff”.
Step 15. Set switches S1 and S2 on the bias interface simulator to ‘0’. Then confirm that
hexadecimal number “0” is displayed by “DI0 TO 7” and “DI8 TO 15”.
NOTE The states of S1 (DI0 TO 7) and S2 (DI8 TO 15) are displayed as a hexadecimal number on
the E4980A’s LCD.
Step 16. Press the TEST STOP softkey.
NOTE Do not execute any SELF TEST except for the Bias Interface Test or the E4980A will
become inoperative.
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