Extron electronic SVS 100 manual Vectorscope screen during horizontal phase adjustment

Installation, cont’d

With this method there is no way to know if the signals are 180º out of phase. A delayed sweep on a time-based scope would allow a more accurate display of the input and output signal phase relationships.

A vectorscope is more accurate than a waveform monitor. Figure 2-8shows an example of a vectorscope display when the horizontal phase is adjusted to align it with the burst (genlock) vector. Adjust the horizontal phase by rotating the encoder knob until the difference between the two vectors is 0º. This example shows black burst only (with no color). The burst vector is pointing to the left from the center.

350	0	10
340		20
330		30
320		40
310		50
300		60
290		70
280		80
270		90
260		100
250		110
240		120
230		130
220		140
210		150

200160

190 180 170

Figure 2-8 — Vectorscope screen during horizontal phase adjustment

Figure 2-9below shows an example of a view of a vectorscope during adjustment of the color subcarrier phase (SC/H). The subcarrier phase should be aligned to 0º (indicated in the figure by the triangle).

350	0	10
340		20
330		30

A1+40	320		40
	310		50
	300		60
A2	290		70
	280		80
A3	270		90
	260		100
B1	250		110
	240		120
B2	230		130
-40	220		140
B3	210		150
	200		160
	190	180	170

Figure 2-9 — Vectorscope screen during color subcarrier phase adjustment

2-8 SVS 100 Installation