Fluke 125B/S Calibration Guide - Page 23

Input A Trigger Sensitivity Test

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Input A Trigger Sensitivity Test To test the Input A trigger sensitivity: 1. Connect the Test Tool to the Calibrator. See Figure 3. A B BNC Industrial ScopeMeter Performance Verification 5522A CALIBRATOR BB120 50Ω BNC Figure 3. Test Tool Input A to Calibrator Scope Output 50 Ω 2. Set up the Test Tool: a. Push  if AUTO does not show in the center of the top row on the display. Note For this procedure, do not push  . b. Push  or  to change the sensitivity, to select manual sensitivity ranging, and to lock the Input A sensitivity on 200 mV/div. 3. Set up the Calibrator: a. Supply a 5 MHz leveled sine wave of 100 mV peak-to-peak (SCOPE output, MODE levsine). b. Push . 4. Adjust the amplitude of the sine wave to 0.5 division. a. Verify that the signal is well triggered. If it is not, press  to enable  for Trigger Level adjustment. b. Use  to adjust the trigger level and verify that the signal is triggered. The trigger icon () indicates the trigger level. 5. On the Calibrator, supply a 25 MHz (123B) or 40 MHz (124B/125B) leveled sine wave of 400 mV peak-to-peak. 6. Adjust the amplitude of the sine wave to 1.5 divisions. a. Verify that the signal is well triggered. If it is not, press  to enable  for Trigger Level adjustment. b. Use  to adjust the trigger level and verify that the signal is triggered. 7. On the Calibrator, supply a 40 MHz (123B) or 60 MHz (124B/125B) leveled sine wave of 1.8 V peak-to-peak. 8. Adjust the amplitude of the sine wave to 4 divisions. a. Verify that the signal is well triggered. If it is not, press  to enable  for Trigger Level adjustment. b. Use  to adjust the trigger level and verify that the signal is triggered. 15

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Industrial ScopeMeter
Performance Verification
15
Input A Trigger Sensitivity Test
To test the Input A trigger sensitivity:
1.
Connect the Test Tool to the Calibrator. See Figure 3.
Figure 3. Test Tool Input A to Calibrator Scope Output 50
Ω
2.
Set up the Test Tool:
a.
Push
if AUTO does not show in the center of the top row on the display.
Note
For this procedure, do not push
.
b.
Push
or
to change the sensitivity, to select manual sensitivity ranging, and to lock the Input A
sensitivity on 200 mV/div.
3.
Set up the Calibrator:
a.
Supply a 5 MHz leveled sine wave of 100 mV peak-to-peak (SCOPE output, MODE levsine).
b.
Push
.
4.
Adjust the amplitude of the sine wave to 0.5 division.
a.
Verify that the signal is well triggered.
If it is not, press
to enable

for Trigger Level adjustment.
b.
Use

to adjust the trigger level and verify that the signal is triggered.
The trigger icon (
) indicates the trigger level.
5.
On the Calibrator, supply a 25 MHz (123B) or 40 MHz (124B/125B) leveled sine wave of 400 mV peak-to-peak.
6.
Adjust the amplitude of the sine wave to 1.5 divisions.
a.
Verify that the signal is well triggered.
If it is not, press
to enable

for Trigger Level adjustment.
b.
Use

to adjust the trigger level and verify that the signal is triggered.
7.
On the Calibrator, supply a 40 MHz (123B) or 60 MHz (124B/125B) leveled sine wave of 1.8 V peak-to-peak.
8.
Adjust the amplitude of the sine wave to 4 divisions.
a.
Verify that the signal is well triggered.
If it is not, press
to enable

for Trigger Level adjustment.
b.
Use

to adjust the trigger level and verify that the signal is triggered.
5522A
CALIBRATOR
A
B
50Ω
BB120
BNC
BNC