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5-10
PROCESSING TIME
After a signal has been measure, the counter requires time to process the information. The
overhead introduced by the internal processing of the counter is 50 mS
Processing Time: 50 mS
MEASUREMENT CYCLE TIME
Frequency/Period Measurements
Example:
Signal Frequency:
1 KHz = = > Period: 1 mS
Resolution: 9 digits
= = > Gate Time: 1 S
Auto-trigger Channel A: 500 mS
Processing Time: 50 mS
Meas. Time = Gate Time + 2 Period
Meas. Time = 1 S + 2 (1 mS)
Meas. Time = 1.002 S
Measurement Cycle = Processing time + Trigger Time + Meas. Time
Measurement Cycle = 50 mS = 500 mS + 1.002 S
Measurement Cycle = 1.552 S
NOTE:
Frequency/period measurements do not require the enabling of auto-trigger
on both input channels. Only the channel with the input signal needs to have
auto-trigger enabled. This reduces the amount of overhead introduced by
auto-trigger. Frequency/period measurements also allow the selection of
manual trigger. This would eliminate the overhead to the measurement cycle
caused by auto-trigger.
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