Racal Instruments 2461 User Manual page 172

User Manual 2461 Type C
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
Accuracy
Risetime:
Fall Time:
where:
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.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
± RESOLUTION ± (TIMEBASE ERROR x Tr) ± (TRIGGER LEVEL
) ± E
iii
TIMING ERROR
CHANNEL DELAY ERROR
± RESOLUTION ± (TIMEBASE ERROR x Tf) ± (TRIGGER LEVEL
) ± E
iii
TIMING ERROR
CHANNEL DELAY ERROR
Tr = measured Rise Time
Tf = measured Fall Time
E = Error in measuring the 10% point
10
E = Error in measuring the 90% point
90
ii ± STOP TRIGGER ERROR
± E
iii
x SR x SR
10 ST 90 SP
iv
)
± E
iii
x SR x SR
10 ST 90 SP
iv
)
ii
± 2ns (DIFFERENTIAL
iii
± 2ns (DIFFERENTIAL
iii
A-13