Figure 3-6. Inverted video phase and continuous subcarrier

The Principles of Television Studio Timing Systems
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SS0607-8

30 September 1988

Figure

3-7.

Subcarrier

phase

Figure 3-6.

Inverted video phase

adjusted for null at burst

and continuous subcarrier

g. Adjust the oscilloscope for chop mode, noninverted video, and adjust

vertical positions to exactly overlay subcarrier and sync.

h. Adjust the oscilloscope-delayed sweep for a display showing the

leading edge of sync and the subcarrier.

A proper phase relationship

requires coincidence at the 50-percent points of the leading edge of sync

and the subcarrier zero crossings (fig 3-8). An improper phase relationship

is shown in Figure 3-9.

Figure 3-8.

Properly-phased SC/H signal