Z-Mod Sensitivity - Fluke Autoranging CombiScope PM3370B Reference Manual

PERFORMANCE TEST
14 - Turn the TRIGGER LEVEL control, and check that a well-triggered signal
is obtained.
15 - Press the ANALOG key ('ANALOG MODE' is displayed briefly) to return
to analog mode.
Repeat the procedure for CH2 with trigger pattern xHxx
Repeat the procedure for CH3 with trigger pattern xxHx
Repeat the procedure for CH4 with trigger pattern xxxH
4.3.41

Z-MOD sensitivity

This test checks the sensitivity of the Z modulation facility.
Test equipment:
Fluke 5500A mode: wavegen, wave square (Alternative: function generator
PM 5136).
T-piece.
Test set-up:
Settings/procedure and requirements:
1 - Apply a 1 kHz square-wave signal, duty cycle 50%, amplitude between 0
to +2.5V, to input CH1. Adjust the generator to a signal of 2.5 Vpp with an
offset of 1.25V.
2 - Press the AUTOSET key.
3 - Set MTB to 0.5 ms/div.
4 - Set the trace of CH1 in mid position with the CH1 POS control.
5 - Apply the same signal by means of the T-piece to the Z input (rear side).
6 - Adjust TRACE INTENSITY so that only the bottom half of the squarewave
is displayed. The top half must be invisible (0.5 ms light on; 0.5 ms light off).
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