Fluke ScopeMeter 190 Series III, Service Manual

Page: 28 / 70

190 Series III
Service Manual
24
To test the Input D trigger sensitivity:
1. Connect the Test Tool to the 5502A. See
Figure 9 .
Note
The test steps for channel D are only for the 4-channel models.
Figure 9. 5502A Scope Output to Test Tool Input D
2. Reset the Test Tool to select the Test Tool setup.
3. Press
D
to turn Input D on.
4. Use
l
to move the Input D trace zero to the center grid line.
5. Press
T
and use
1
to select Input D as trigger source.
6. Use
j
and
k
to change the sensitivity range to select manual sensitivity ranging and lock
the Input D sensitivity range on 2 V/div .
7. Repeat step 4 to step 8 same as for the Input A trigger test.
When you are finished, set the 5502A to Standby.
Input A AC Voltage Accuracy (HF) and Bandwidth Test
To test the Input A high frequency automatic scope ac voltage measurement accuracy and the
bandwidth:
1. Connect the Test Tool to the 5502A. See
Figure 5 .
2. Select the Test Tool setup:
a. Recall the setup (see Standard Test Tool Setup ). Press
S
,
2
(RECALL) and
select SETUP , press
E
, select the setup name, and press
E
to recall the
setup.
A D C
B
NORMAL SCOPE
FLUKE 5502A CALIBRATOR
PM9091
PM9585 - 50
:
USE 50
:
TERMINATION
4 CHANNELS
For 190-502 and -504
use only TRM50!