Input B Trigger Sensitivity Test - Fluke 190-104 Service Manual

Fluke 190-104/190-204
Service Information

4.6.11 Input B Trigger Sensitivity Test

Proceed as follows to test the Input B trigger sensitivity:
1. Connect the Test Tool to the 5500A as shown in Figure 4-8.
A
2. Select the following Test Tool setup:
3. Using
4. Set the 5500A to source the leveled sine wave given in the first row of Table 4-10.
5. Adjust the 5500A output voltage until the displayed trace has the amplitude indicated
6. Verify that the signal is well triggered.
7. Continue through the test points.
8. When you are finished, set the 5500A to Standby.
UUT
Model
ALL
4-22
PM9585 - 50 OHM
B C D
Figure 4-8. 5500A Scope Output to Test Tool Input B
B
•
Press and use
A
•
Press and use
B
•
Press : using
•
Press TRIGGER and use
mV RANGE
•
Using and
RANGE
ranging, and lock the Input B sensitivity range on 2 V/div.
s TIME ns
select the time base indicated under the first column of Table 4-10.
under the appropriate column of Table 4-10.
If it is not, press TRIGGER
manual Trigger Level adjustment. Adjust the trigger level and verify that the signal
will be triggered now. The trigger level is indicated by the trigger icon ( ).
Table 4-10. Input B Trigger Sensitivity Test Points
UUT
Time base
200 ns/div
PM9091
USE 50 OHM
TERMINATION
NORMAL SCOPE
FLUKE 5500A CALIBRATOR
F1
to turn Input B on.
F1
to turn Input A off.
move the Input B trace zero to the center grid line.
MOVE
F1
to select Input B as trigger source.
change the sensitivity range to select manual sensitivity
V
F3
, then using
5500A SC... MODE levsin
Initial Input Voltage
100 mV pp
enable the up/down arrow keys for
Frequency Trigger Amplitude
5 MHz
UUT
0.5 div