Fluke 43B - Input 2 Trigger Sensitivity Test

43B
Service Manual
4-12
17. Verify that the 5500A voltage is between +1.5V and +2.5V when the test tool is
triggered.
To repeat the test, start at step 12.
18. When you are finished, set the 5500A to Standby.
4.5.6 Input 2 Trigger sensitivity Test.
Proceed as follows to test the Input 2 trigger sensitivity:
1. Connect the test tool to the 5500A as for the previous test shown in Figure 4-3.
2. Select the AUTO test tool setup:
• Press
to select the MENU.
• Press
till SCOPE is highlighted.
• Press
to select SCOPE mode.
3. Make Input 2 active:
• Press
to select menu SCOPE SETUP.
• Press
to select Input 2 READING.
• Press
to highlight AC+DCrms.
• Press
to confirm;  mark changes to ■.
• Press
to highlight Input 2 Coupling.
• Press
to select the Input 2 Coupling menu.
• Press
to highlight DC Coupling.
• Press
to confirm;  mark changes to ■.
• Press
to return to SCOPE.
4. Select trigger on channel 2.
• Short-circuit Input 1 with a BB120 and a 50Ω feed through piece.
• Set the 5500A to source a 5 kHz leveled sine wave of 100 mVpp (NORMAL
output, MODE wave sine). If necessary readjust signal amplitude to 0.5 div.
5. Select the following test tool setup:
• Press
and select RANGE 2.
• Press
to select 200A/d.
• Press
to select a timebase of 50 µs/d.
6. Verify that the signal is well triggered , if necessary adjust the trigger level (see 7).
7. Adjusting trigger level.
• Press
.
• Press
to highlight TRIGGER.
• Press
to adjust.