Fluke 125B/S Calibration Guide - Page 27

Industrial ScopeMeter Performance Verification 4. Adjust the amplitude of the sine wave to 0.5 division on the display: 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 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 exactly 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. Input A and Input B Trigger Level and Trigger Slope Test In the trigger level and slope tests, some steps direct you to select positive or negative slope triggering. To set up the Test Tool for positive or negative slope triggering: 1. Push  and then . 2. Push  to select positive slope triggering (trigger icon ) or negative slope triggering (trigger icon ). 3. Push  to set the trigger level to +2 divisions from the screen center. Note For positive slope triggering, the trigger level is at the top of the trigger icon (). For negative slope triggering, the trigger level is the bottom of the trigger icon (). To test the trigger level and slope: 1. Connect the Test Tool to the Calibrator. See Figure 5. A B 5522A CALIBRATOR BB120 BB120 PM9093/001 PM9091/001 (1.5 m) PM9092/001 (0.5 m) Figure 5. Test Tool Input A-B to Calibrator Scope Output 19