Filter
Top Products
Performance Tests
TDS 684A, TDS 744A, & TDS 784A Service Manual
4–81
Figure 4–39: Sync Duty Cycle Test: Critically Adjusted Pulse
H Press TRIGGER MENU.
H Press the main-menu Type pop-up until you select Video.
If the TRIG’D LED is not lighted, check that the CH1 – Width and
CH1 Period measurements are adjusted correctly. See note above.
CONFIRM that the setup is correct and the oscilloscope will trigger.
H CONFIRM that the TRIG’D LED is lighted and the waveform is
stable.
H Disconnect the signal source from CH1, wait a few seconds, then
reconnect the signal.
H CONFIRM that the TRIG’D LED is lighted and the waveform is
stable.
H Press Sync Polarity.
H Press Pos Sync.
H Push the pulse generator COMPLEMENT button out.
H CONFIRM that the TRIG’D LED is lighted and the waveform is
stable.