Fluke 190-062, -102, -104, -202, -204, -502, -504
Service Manual
4-18
Input A, B, C, D Frequency Measurement Accuracy Test
Note
The test steps for channel C and D are only for the models
190-104, 190-204, and 190-504.
Proceed as follows to test the frequency measurement accuracy:
1. Connect the Test Tool to the 5502A as shown in Figure 4-5. Do not use 50 Ω
terminations.
NORMAL SCOPE
FLUKE 5502A CALIBRATOR
CONNECT TO CHANNEL A, B, C, D IN PARALLEL
50 OHM TERMINATIONNO
ADC
B
PM9093
PM9092
AB
METER
P
M
9
0
9
3
PM9092
PM9091
2 CHANN. + METER
4 CHANNELS
perf-ver-c2.eps
Figure 4-5. 5502A Scope Output to Test Tool Input A, B, C, D
2. Select the following Test Tool setup:
a) Recall the created setup (see Standard Test Tool Setup). Press
SAVE
,
F2
(RECALL) and select SETUP, press
ENTER
, select the setup name,
and press
ENTER
to recall the setup.
b) Press
SCOPE
.
c) Press
F2
(– READING …) and select with
F1
(– READINGS)
and with
:
Reading 1, on A, Hz
Reading 2, on B, Hz
Reading 3, on C, Hz
Reading 4, on D, Hz
3. Use
mV
RANGE
and
RANGE
to select range 100 mV/div for A, B, C and D.
4. Use
TIMEsns
to select the required time base setting.
5. Set the 5502A to source a sine wave according to the first test point in
Table 4-7.
Because no 50 Ω termination is applied, the 5502A leveled sine wave output
amplitude is twice the set value.
6. Observe reading
A, B, C, and D and check that it is within the range shown
under the appropriate column.
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