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Performance Verification
SPG 422 Service Manual (B034000 and above)
4–15
e.
Check that the LEDs on the DEMUX board light as given in the
following list:
PLL Unlock
OFF (not red)
Video Exist
green
Audio Exist (A1 – A4)
all green
Audio Error (A1 – A4)
all off (not red)
f.
Select REC on the DAT. Ensure that the DAT is in PAUSE and the
“INPUT” Digital LED is solid red.
g. Check for a 1 kHz audio tone, using the VM700T.
h. Set the SPG 422 to transmit 800 Hz on all four channels.
i.
Check that the tone changes to 800 Hz and that the LEDs remain in the
correct state.
j.
Set the SPG 422 to transmit silence on channel 1; leave the other
channels at 800 Hz.
k. Check that the AUDIO EXIT LED A1 turns off, while the other three
remain on.
l.
Set the SPG 422 to transmit silence on channels 1 and 2. Keep 800 Hz
on the other channels.
m. Check that the AUDIO EXIT LEDs A1 and A2 are off and the other two
remain on.
n. Set the SPG 422 to transmit silence on all channels except 4. Keep
800 Hz on channel 4.
o. Check that the AUDIO EXIT LEDs A1, A2, and A3 are off and A4 is
on.
p. Set the SPG 422 to transmit silence on all channels.
q. Check that none of the AUDIO EXIST LEDs light.
r.
Set the SPG 422 to output 1 kHz on all channels.
s.
Check that all of the AUDIO EXIST LEDs light again.
To verify the performance of the Serial Black output, repeat procedures 1, 2, 3, 4,
5, 6, and 7, except replace the Serial Bars output (CH A on the WFM 601E) with
the Serial Black output (CH B on the WFM 601E).
Serial Digital — Serial
Black Output
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 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 ...
Page 229: ...9 9 SPG 422 Service Manual SPG 422 Component Digital Sync Generator CPU I O 2 ...
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