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Performance Verification
SPG 422 Service Manual (B034000 and above)
4–13
i.
Align the first cursor with the position where the falling edge of the eye
pattern intersects the 0.5 graticule. Align the second cursor with the
intersection of the falling edge of the eye pattern and the –0.1 graticule.
j.
Read the
t from the waveform monitor.
k. Convert the value from the waveform monitor to the actual rise time
using the table.
l.
Check that the actual fall time is between 0.400 and 1.500 ns.
4. Difference between Rise and Fall Times (
≤
0.50 ns)
a. Subtract the actual rise time from the actual fall time found in the
previous procedure.
b. Check that the absolute value is
≤
0.50 ns.
5. Jitter (
≤
0.25 ns)
a. Connect the equipment as shown in Figure 4–1.
b. Display CH A using the WFM 601E eye pattern display.
c.
Use the WFM 601E OVERLAY display mode (found in the EYE
PATTERN CONFIGure menu).
d. Set the WFM 601E to use the 10 Hz jitter filter.
e.
Set the WFM 601E to x5 vertical gain.
f.
Use the timing cursors to measure the width of the eye crossings (see
Figure 4–2).
OVERSHOOT <10%
JITTER
±
0.25 ns
AMPLITUDE
0.8 V
±
10%
20—80%
RISE TIME
0.75—1.50 ns
Figure 4–2: Various parts of the serial data stream
g. CHECK— that the
t of the timing cursors is
≤
0.25 ns.
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 ...
Page 102: ...Performance Verification 4 10 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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