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User Manual 2461 Type C
A-13
STOP on +ve slope at 90% of measured pk-pk
Fall Time Trigger Points
START on -ve slope at 90% of measured pk-pk
STOP on -ve slope at 10% of measured pk-pk
LSD
1ns (100ps with averaging)
Resolution
±
LSD
±
1ns RMS
±
START TRIGGER ERROR
ii
±
STOP TRIGGER ERROR
ii
Accuracy
Risetime:
±
RESOLUTION
±
(TIMEBASE ERROR x Tr)
±
(TRIGGER LEVEL
TIMING ERROR
iii
)
±
E
10
x SR
ST
iii
±
E
90
x SR
SP
iii
±
2ns (DIFFERENTIAL
CHANNEL DELAY ERROR
iv
)
Fall Time:
±
RESOLUTION
±
(TIMEBASE ERROR x Tf)
±
(TRIGGER LEVEL
TIMING ERROR
iii
)
±
E
10
x SR
ST
iii
±
E
90
x SR
SP
iii
±
2ns (DIFFERENTIAL
CHANNEL DELAY ERROR
iv
)
where:
Tr = measured Rise Time
Tf = measured Fall Time
E
10
= Error in measuring the 10% point
E
90
= Error in measuring the 90% point
Notes and Definitions
Note (i) - Resolution/Gate Time
In FREQUENCY, PERIOD, RATIO and CHECK modes, the gate time is set by the
resolution selected. However the gate time will be extended by up to:
One period of the input signals on FREQUENCY 2, PERIOD 2, RATIO 1/2.
Two periods of the input signal on FREQUENCY 1, PERIOD 1.
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