Adjustment Procedures
5-50 2715 Spectrum Analyzer Service Manual
VerticalSync Output Check. Use this procedure to check the VerticalSync 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 oscilloscopeCH 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. Verticaloutput’s pulse appears at the same place on screen as video
vertical sync pulse.
CH1
500 mV/DIV
(VIDEO)
CH2
5 V/DIV
(VERTICALSYNC)
Figure 5- 20: VerticalSync Output Waveform