Performance Verification and Adjustment Procedures
TSG 90 PATHFINDER Service Manual
3–6
10. Check K–Factor
a. With the NTC7 Composite signal still displayed, set the 1780 for
K–Factor measurement.
b. CHECK — that the PATHFINDER K–Factor is
≤
0.5%.
11. Check Differential Phase and Gain
a. Set the 1780 Vectorscope mode to measure differential phase. Use the
double trace method, if possible.
b. CHECK — for differential phase of
≤
1
°
.
c.
Set the 1780 Vectorscope mode to measure differential gain. Use the
double trace method, if possible.
d. CHECK — for differential gain of
≤
1%.
12. Check Line Tilt
a. With the NTC7 Composite signal still displayed, set the 1780 waveform
display to show the White bar.
b. CHECK — using the 1780 voltage cursors, that the tilt from the
beginning to the end of the White bar is
≤
3.57 mV (0.5 IRE), ignoring
the first and last
µ
s.
13. Check Field Tilt
a. Select the Field Square Wave from the PATHFINDER (Press I).
b. Set the 1780 waveform display to show one field.
c.
CHECK — using the 1780 voltage cursors, that the tilt from the
beginning to the end of the White bar is
≤
3.57 mV (0.5 IRE), ignoring
the first and last three lines.
14. Check Multiburst Frequency Response
a. Select the Multiburst signal from the PATHFINDER (press C).
b. CHECK — using the 1780 voltage cursors that the packets are flat and
of equal amplitude,
±
2%, to 4.2 MHz.
15. Check Total Harmonic Distortion (THD)
a. Connect the PATHFINDER Audio Channel 2 to the AA501 Audio
Distortion analyzer. Attach a 600
Ω
resistor between the analyzer’s + and
– terminals to represent the system load.
Audio Outputs
Содержание TSG 90 PATHFINDER
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Страница 22: ...Specifications 1 10 TSG 90 PATHFINDER Service Manual Figure 1 2 75 Color Bars Figure 1 3 Red Field...
Страница 23: ...Specifications TSG 90 PATHFINDER Service Manual 1 11 Figure 1 4 SIN X X Figure 1 5 5 Step Staircase Gray Scale...
Страница 24: ...Specifications 1 12 TSG 90 PATHFINDER Service Manual Figure 1 6 0 IRE Flat Field Figure 1 7 50 IRE Flat Field...
Страница 25: ...Specifications TSG 90 PATHFINDER Service Manual 1 13 Figure 1 8 Black Burst Figure 1 9 Field Square Wave...
Страница 26: ...Specifications 1 14 TSG 90 PATHFINDER Service Manual Figure 1 10 Multiburst Figure 1 11 Convergence Components...
Страница 27: ...Specifications TSG 90 PATHFINDER Service Manual 1 15 Figure 1 12 NTC7 Composite Figure 1 13 NTC7 Combination...
Страница 28: ...Specifications 1 16 TSG 90 PATHFINDER Service Manual Figure 1 14 FCC Composite Figure 1 15 Matrix...
Страница 29: ...Specifications TSG 90 PATHFINDER Service Manual 1 17 Figure 1 16 Safe Area...
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Страница 79: ...Diagrams Circuit Board Illustrations TSG 90 6 3 TSG 90 Block Diagram...
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