Fluke 225C Service Manual - Page 39

Input A&B Phase Measurements Test, READING 1, RECALL, SCREEN+SETUP, RECALL SETUP, Phase

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4 Performance Verification 4.6 Scope Input A&B Tests • Press • Press READING 1 , and select on A | Hz. READING 2 , and select on B | Hz. 3. Using and select range 100 mV/div for A and B. 4. Using select the required time base setting. 5. Set the 5500A to source a sine wave according to the first test point in Table 4-6. As no 50Ω termination is applied, the 5500 leveled sine wave output amplitude will be twice the set value. 6. Observe the readings (1.A and 2.B) and check to see if it is within the range shown under the appropriate column. 7. Continue through the test points. 8. When you are finished, set the 5500A to 0 (zero) Volt, and to Standby. Table 4-6. Input A&B Frequency Measurement Accuracy Test Model Time base 5500A-SC... MODE Voltage all 20 ms/div wavegen, sine 600 mVpp 192B-C 20 ns/div levsine 300 mVpp 196B-C, 215C 20 ns/div levsine 300 mVpp 199B-C, 225C 20 ns/div levsine 300 mVpp Frequency 16 Hz 60 MHz 100 MHz 200 MHz Input A&B Reading 15.90 to 16.10 59.68 to 60.32 99.3 to 100.7 198.8 to 201.2 Note Duty Cycle and Pulse Width measurements are based on the same principles as Frequency measurements. Therefore the Duty Cycle and Pulse Width measurement function will not be verified separately. 4.6.7 Input A&B Phase Measurements Test Proceed as follows to test the phase measurement accuracy: 1. Connect the test tool to the 5500A as for the previous test (see Figure 4-4). 2. Select the following test tool setup: • Recall the created SETUP 1 (see section 4.4.3): press , select SCREEN+SETUP 1 , press RECALL SETUP . • Press • Press • Press READING 1 , and select on A | Phase. READING 2 , and select on B | Phase. 3. Using and select range 100 mV/div for A and B. RECALL , 4. Using select the required time base setting. 5. Set the 5500A to source a sine wave according to the first test point in Table 4-6. As no 50Ω termination is applied, the 5500 leveled sine wave output amplitude will be twice the set value. 4-15

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Performance Verification
4.6 Scope Input A&B Tests
4
4-15
•
Press
READING 1
, and select
on A |
Hz
.
•
Press
READING 2
, and select
on B |
Hz
.
3.
Using
and
select range 100 mV/div for A and B.
4.
Using
select the required time base setting.
5.
Set the 5500A to source a sine wave according to the first test point in Table 4-6.
As no 50
Ω
termination is applied, the 5500 leveled sine wave output amplitude will
be twice the set value.
6.
Observe the readings (
1.A
and
2.B
) and check to see if it is within the range shown
under the appropriate column.
7.
Continue through the test points.
8.
When you are finished, set the 5500A to 0 (zero) Volt, and to Standby.
Table 4-6. Input A&B Frequency Measurement Accuracy Test
Model
Time base
5500A-SC... MODE
Voltage
Frequency
Input A&B Reading
all
20 ms/div
wavegen, sine
600 mVpp
16 Hz
15.90 to 16.10
192B-C
20 ns/div
levsine
300 mVpp
60 MHz
59.68 to 60.32
196B-C, 215C
20 ns/div
levsine
300 mVpp
100 MHz
99.3 to 100.7
199B-C, 225C
20 ns/div
levsine
300 mVpp
200 MHz
198.8 to 201.2
Note
Duty Cycle and Pulse Width measurements are based on the same
principles as Frequency measurements.
Therefore the Duty Cycle and
Pulse Width measurement function will not be verified separately.
4.6.7 Input A&B Phase Measurements Test
Proceed as follows to test the phase measurement accuracy:
1.
Connect the test tool to the 5500A as for the previous test (see Figure 4-4).
2.
Select the following test tool setup:
•
Recall the created SETUP 1 (see section 4.4.3): press
,
RECALL
,
select
SCREEN+SETUP
1
, press
RECALL SETUP
.
•
Press
•
Press
READING 1
, and select
on A |
Phase
.
•
Press
READING 2
, and select
on B |
Phase
.
3.
Using
and
select range 100 mV/div for A and B.
4.
Using
select the required time base setting.
5.
Set the 5500A to source a sine wave according to the first test point in Table 4-6.
As no 50
Ω
termination is applied, the 5500 leveled sine wave output amplitude will
be twice the set value.