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Performance Verification
5–4
VITS100 NTSC VITS Inserter Instruction Manual
2. Select the NTC7 Composite signal from the television test signal generator.
3. Store the bar and the line time portions of the NTC7 composite signal as a
video measurement set reference signal.
4. Store the C–L gain + delay portions of the NTC7 composite signal as the
video measurement set reference.
5. Store the diff phase + gain portions of the NTC7 composite signal as the
video measurement set reference.
6. Select Waveform on the video measurement set.
7. Select the black burst signal from the television test signal generator.
8. Store the black burst signal as the noise spectrum signal for the video
measurement set.
To make the remainder of this procedure easier to perform, start by inserting only
the 0% black signal on line 17 of fields 1 and 3. Be sure to record the current
settings of the VITS selection switches before resetting them for this procedure;
reset the switches to these settings when returning the instrument to service.
1. Remove the small access plate from the top of the VITS inserter and check
the settings of dual-inline-package (DIP) switches S1–S4 (see Figure 5–1).
Record the settings so you can restore them once you complete this
procedure.
Program color fields
1 and 3
Program color fields
2 and 4
Line 18 Line 17
Line 20 Line 19
Line 18 Line 17
Line 20 Line 19
S1 S2 S3 S4
Figure 5–1: VITS selection DIP switches
Select VITS