User's Manual

123
Service Manual
4-10
4. Set the 5500A frequency according to the first test point in Table 4-1.
5. Observe the Input B main reading on the test tool and check to see if it is within the
range shown under the appropriate column.
6. Continue through the test points.
7. When you are finished, set the 5500A to Standby.
4.5.6 Input B Frequency Response Upper Transition Point Test
Proceed as follows to test the Input B frequency response upper transition point:
1. Connect the test tool to the 5500A as for the previous test (see Figure 4-4).
2. Select the following test tool setup:
• Turn Input B on (if not already on).
• 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 B sensitivity on 200 mV/div.
• Press
to open the SCOPE INPUTS menu.
• Press
to open the TRIGGER menu, and choose:
INPUT: ■ B | SCREEN UPDATE: ■ FREE RUN | AUTO RANGE: ■ >15HZ
3. Set the 5500A to source a leveled sine wave of 1.2V peak-to-peak, 50 kHz (SCOPE
output, MODE levsin).
4. Adjust the amplitude of the sine wave to 6 divisions on the test tool display.
5. Set the 5500A to 20 MHz, without changing the amplitude.
6. Observe the Input B 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 4.5.11.
4.5.7 Input B Trigger Sensitivity Test
Proceed as follows to test the Input B trigger sensitivity:
1. Connect the test tool to the 5500A as for the previous test (see Figure 4-4).
2. Select the following test tool setup:
• Turn Input B on (if not already on).
• 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 B sensitivity on 200 mV/div.
• Press
to open the SCOPE INPUTS menu.