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TIME INTERVAL MEASUREMENTS
Time interval measurements are highly dependent on the measurement signal. The user will
need to approximate the time interval, rise/fall time, or pulse width of the measurement signal
in order to calculate an approximate measurement cycle time.
NOTE:
Rise/fall time and pulse width measurements require auto-trigger
EXAMPLE:
Signal Frequency: 1 MHz
Rise Time: 50 nS =
= = > Meas. Time: 50 nS
Auto-trigger Channel A: 500 mS
Auto-trigger Channel B: 500 mS
Processing Time: 50 mS
Measurement Cycle = Processing Time + Trigger Time + Meas. Time
Measurement Cycle = 50 mS + (500 mS + 500 mS) + 50 nS
Measurement Cycle = 1.05000005 S
RATIO MEASUREMENTS
Ratio Measurements involve frequency readings of two signals over a specified gate time.
EXAMPLE:
Signal A Frequency: 2 MHz = = > Period: 0.5 FS
Signal B Frequency: 1 MHz = = > Period: 1 FS
Programmed GateTime: 100 mS
Auto-trigger Channel A: 500 mS
Auto-trigger Channel B" 500 mS
Processing Time: 50 mS
Meas. Time = Programmed Gate Time + < 2 Periods of Slower Signal
Meas. Time = 100 mS + 2 (1 FS)
Meas. Time = 100.002 mS
Measurement Cycle = Processing Time + Trigger Time + Meas. Time
Measurement Cycle = 50 mS (500 mS) + 100.001 mS
Measurement Cycle = 50 mS + 1000 mS + 100.001 mS
Measurement Cycle = 1.150002 S
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