Vertical Deflection; Base Line Instability - Fluke Autoranging CombiScope PM3370B Reference Manual

PERFORMANCE TEST
Requirements
- Verify that the visible signal delay is at least 15 ns (3 divisions).
visual signal delay
Figure 4.2 Visual signal delay
4.3.20

Vertical deflection; base line instability

In the following test, several adjustments of balance, offset and jump, are
checked.
Test equipment
None
Settings/procedure and requirements:
1 - Press the AUTOSET key (no input signal) and set CH1 to 5V/div.
2 - Use the CH1 POS control to position the trace in the vertical middle of the
screen.
3 - Press both CH1 AMPL keys simultaneously to select the VARiable mode.
The readout changes to 5.00V. The input sensitivity can be adjusted now
in very fine steps between 2 mV and 12.5V/div.
4 - Press the 'V' key and verify that the base line jump is not more than
0.2 divisions between 5.00V to 12.5V/div.
5 - Press the 'mV' key and verify that the base line jump is not more than
0.2 divisions between 12.5V/div to 5 mV/div.
6 - Press the ON keys of CH2 and CH1; CH2 is now on and CH1 is off.
7 - Using the CH2 POS control, position the trace in the vertical middle of the
screen.
8 - Press both CH2 AMPL keys simultaneously to select the VARiable mode.
The readout changes to 5.00V. The input sensitivity can be adjusted now
in very fine steps between 2 mV and 12.5V/div.
MTB 5ns 10
*
3div
MAT4167
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