Fluke 123 - Input a Frequency Response Upper Transition Point Test; Input a Frequency Measurement Accuracy Test

Performance Verification
3.5 Input A and Input B Tests 3
3-9
9. Set the 5500A to source a 40 MHz (Fluke 123) or 60 MHz (Fluke 124/125) leveled sine
wave of 1.8V peak-to-peak.
10. Adjust the amplitude of the sine wave to 4 divisions on the test tool display.
11. Verify that the signal is well triggered.
If it is not, press
to enable the up/down arrow keys for Trigger Level adjustment;
adjust the trigger level and verify that the signal will be triggered now.
12. When you are finished, set the 5500A to Standby.
3.5.3 Input A Frequency Response Upper Transition Point Test
Proceed as follows to test the Input A frequency response upper transition point:
1. Connect the test tool to the 5500A as for the previous test (see Figure 3-3).
2. Select the following test tool setup:
• Press
to select auto ranging (AUTO in top of display).
Do not press
anymore!
• Using
change the sensitivity to select manual sensitivity ranging, and lock
the Input A sensitivity on 200 mV/div.
3. Set the 5500A to source a leveled sine wave of 1.2V peak-to-peak, 50 kHz (SCOPE
output, MODE levsine). Set the 5500A to Operate (OPR).
4. Adjust the amplitude of the sine wave to 6 divisions on the test tool display.
5. Set the 5500A to 20 MHz (Fluke 123) or 40 MHz (Fluke 124/125), without changing the
amplitude.
6. Observe the Input A trace check to see if it is ≥ 4.2 divisions.
7. When you are finished, set the 5500A to Standby.
Note
The lower transition point is tested in Section 3.5.11.
3.5.4 Input A Frequency Measurement Accuracy Test
Proceed as follows to test the Input A frequency measurement accuracy:
1. Connect the test tool to the 5500A as for the previous test (see Figure 3-3).
2. Select the following test tool setup:
• Press
to select auto ranging (AUTO in top of display).
• Press
to open the INPUT A MEASUREMENTS menu, and choose:
MEASURE on A:  Hz
3. Set the 5500A to source a leveled sine wave of 600 mV peak-to-peak (SCOPE output,
MODE levsine). Set the 5500A to Operate (OPR).
4. Set the 5500A frequency according to the first test point in Table 3-1.