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Performance Verification
4–36
SPG 422 Service Manual (B034000 and above)
i.
Set the step attenuator to read 9 (–3 dB).
j.
Check the SPG 422 front panel menu to see that the instrument remains
sync locked.
k. Check the vectorscope for a < 2
°
color shift.
l.
Set the step attenuator to read 6 (0 dB).
32. Input SC/H Phase Range for Correct Color Framing 0
°
±
45
°
(Will maintain initial color framing until the SC/H error exceeds 120
°
)
a. Connect the equipment as shown in Figure 4–9.
b. Set the step attenuator to read 6 (0 dB).
c.
Set the TG 2000 AVG1 subcarrier phase to 0
°
. Select Signal Parameters
to adjust the subcarrier phase.
d. Set the 1780 to display CH A and CH B1 on the vectorscope in overlay
mode using external reference.
e.
Rotate the vectorscope display so that CH B1 (the SPG 422 genlock
input) is on the 0 line.
f.
Use the SPG 422 Black 1 signal delay to place the CH A vector on the 0
line.
g. Use the TG 2000 AVG1 subcarrier phase control to vary the phase until
the CH A vector jumps color frame. Note the position of the CH B1
vector.
h. Check that the CH B1 vector changes more than 120 before the genlock
changes color frame.
i.
Return the TG 2000 AVG1 subcarrier phase to 0
°
.
33. Burst Lock Phase Change with Input Signal APL
≤
1
°
(Over input signal APL range of 10% to 90%)
a. Connect the equipment as shown in Figure 4–9.
b. Set the step attenuator to 0 dB.
c.
Set the SPG 422 to terminate Genlock 2.
d. Set the TG 2000 AVG1 to output a field square wave.
e.
Display CH A on the vectorscope using external reference.
f.
Set the vector on the 0 graticule.
g. Check that the vector jitter is not more than 1
°
.
Summary of Contents for SPG 422
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Page 14: ...Service Safety Summary x SPG 422 Service Manual B034000 and above ...
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Page 96: ...Performance Verification 4 4 SPG 422 Service Manual B034000 and above ...
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Page 158: ...Maintenance 6 14 SPG 422 Service Manual B034000 and above ...
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Page 223: ...9 3 SPG 422 Service Manual SPG 422 Component Digital Sync Generator FRONT PANEL 1 ...
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Page 226: ...SPG 422 Service Manual 9 6 A2 Digital Board Static Sensitive Devices See Maintenance Section ...
Page 227: ...9 7 SPG 422 Service Manual SPG 422 Component Digital Sync Generator CPU 1 ...
Page 228: ...SPG 422 Service Manual 9 8 A7 Serial Filter ...
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