Performance Verification
SPG 422 Service Manual (B034000 and above)
4–23
18. Vertical Timing Offset Range
±
8 lines
NOTE
. You may want to shorten this procedure to only include the 8-line advance
and delay but the full procedure is more thorough.
a. Set up the equipment as shown in Figure 6-6.
b. Set the SPG 422 to output NTSC black burst with no vertical timing
offset on both Black 1 and Black 2.
c.
Display CH A on the waveform monitor using one field horizontal
display, external reference, and enough horizontal magnification to show
eight to ten lines of video.
d. Use the timing cursor to mark any line. This is the reference line. Note
its horizontal position.
e.
Set the SPG 422 Black 1 to one line advance.
f.
Check that the reference line advances one line from its original position.
g. Set the SPG 422 Black 1 to two lines advance.
h. Check that the reference line advances two lines from its original
position.
i.
Set the SPG 422 Black 1 to three line advance.
j.
Check that the reference line advances three lines from its original
position.
k. Set the SPG 422 Black 1 to four lines advance.
l.
Check that the reference line advances four lines from its original
position.
m. Set the SPG 422 Black 1 to five lines advance.
n. Check that the reference line advances five lines from its original
position.
o. Set the SPG 422 Black 1 to six lines advance.
p. Check that the reference line advances six lines from its original
position.
q. Set the SPG 422 Black 1 to 7 lines advance.
r.
Check that the reference line advances seven lines from its original
position.
Summary of Contents for SPG 422
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