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Adjustment Procedures
5-50
2715 Spectrum Analyzer Service Manual
Vertical Sync Output Check. Use this procedure to check the Vertical Sync Output.
1. Change test oscilloscope time/div to 5ms.
2. Move the test oscilloscope channel 2 probe to pin 22 of the extender board.
3. During one cycle of video waveform (test oscilloscope CH 1), verify the
following:
a. The vertical output waveform (test oscilloscope CH 2) appears as a
narrow pulse of 0 to +5 V. Refer to Figure 5--20.
b. The vertical output pulse width is approximately the same as video
vertical sync pulse width.
c. Vertical output’s pulse appears at the same place on screen as video
vertical sync pulse.
CH 1
500 mV/DIV
(VIDEO)
CH 2
5 V/DIV
(VERTICAL SYNC)
Figure 5- 20: Vertical Sync Output Waveform