Fluke ScopeMeter 190 Series III, Service Manual

Page: 22 / 70

190 Series III
Service Manual
18
7. Continue through the test points.
When you are finished, set the 5502A to 0 (zero) Volt and Standby.
Note
Because Duty Cycle and Pulse Width measurements are based on the same principles
as Frequency measurements, these measurement functions are not verified
separately.
Input A&B / C&D Phase Measurements Test
Note
The test steps for channel C and D are only for the 4-channel models.
To test the phase measurement accuracy:
1. Connect the Test Tool to the 5502A. See
Figure 4 .
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.
b. Press
P
.
c. Press
2
(– READING …) and select with
1
(– READINGS) and
h i
:
Reading 1, on A, Phase
Reading 2, on B, Phase
Reading 3, on C, Phase
Reading 4, on D, Phase
Table 7. Input A, B, C, D Frequency Measurement Accuracy Test
Model Time base 5502A-SC... MODE Voltage Frequency Input Reading
All 20 ms/div wavegen, sine 600 mVpp 16 Hz 15.90 to 16.10
190-062 20 ns/div levsine 600 mVpp 60 MHz 59.68 to 60.32
190-104
20 ns/div levsine 600 mVpp 100 MHz 99.3 to 100.7
190-102
190-204/190M-4
20 ns/div levsine 600 mVpp 200 MHz 198.8 to 201.2
190-202/190M-2
190-502
20 ns/div levsine 600 mVpp 500 MHz 497.3 to 502.7
190-504