LeCroy WAVERUNNER 6000 SERIES, Руководство по обслуживанию

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4-10
Theory of Operation
4.6.1.5.1.3
TDC
– The HTB645 has an internal TDC and
the ability to drive an external TDC. The TDC
resolution is
≈
1.4ps.
4.6.1.5.1.4
Timebase
– Provides control of starting and
stopping individual acquisition segments.
4.6.1.5.1.5
Miscellaneous clocks
– provides 125MHz
clock for the NCO and the probe cal generator.
4.6.1.5.2
MST429A
– Smart Trigger IC
4.6.1.5.2.1
Signal I/O
– there are 6 differential ECL trigger
inputs, 6 differential ECL validate inputs and 2
single ended ECL inputs
4.6.1.5.2.2
Trigger Functions
•
edge trigger
•
timeout trigger
•
pulse width trigger
•
interval width trigger
•
setup and hold time violation trigger
4.6.1.5.2.3
Main trigger delay or holdoff selection
•
trigger delayed by time
•
trigger holdoff by time
•
trigger delayed by events
•
trigger delayed by events and time
•
trigger holdoff by events and time
•
trigger delayed by time and events
4.6.1.5.2.4
Qualifier selection
•
gate qualifier
•
state qualifier
•
edge qualifier
•
number of events qualifier
•
state with specified delay qualifier
•
edge with restartable delay qualifier
•
edge with not restartable delay qualifier
•
pulse width qualifier
•
interval width qualifier
4.6.1.5.2.5
Polarity
– Polarity selection for trigger and
qualifier (positive, negative or either)
4.6.1.5.2.6
Analog Time Measure
– Analog time measure
system used for specific trigger and qualifier
from 500ps to 10ns with 250ps resolution, and
from 10ns to 100ns with 500ps resolution
4.6.1.5.2.7
Digital Time Measure
– Digital time measure
system used for specific trigger and qualifier