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TDS 684A, TDS 744A, & TDS 784A Service Manual
4–79
c. Check Sync Duty Cycle.
H Connect the pulse generator (PG502) through a 50 W cable and a
50 W terminator to the oscilloscope CH1 input. See Figure 4–37.
Pulse
Generator
Digitizing Oscilloscope
50 W Cable
50 W
Terminator
Output
Figure 4–37: PG502 Setup for Sync Duty Cycle Test
H Turn the pulse generator OUTPUT (VOLTS) control until the signal
on the oscilloscope shows a one division negative going pulse. See
Figure 4–38.
NOTE. You may need to adjust the trigger level control to obtain a stable trigger.