Lecroy WaveJet 354A 500 MHz 4 Channel Oscilloscope WaveJet 354A Data Sheet
Product codes
WaveJet 354A
Getting Started Manual
WJ-A-GS-E Rev A
53
Top-Base -- Measures the difference between upper and lower levels in two-
level signals. Differs from pkpk in that noise, overshoot, undershoot, and ringing
do not affect the measurement.
do not affect the measurement.
+Overshoot -- Amount of overshoot following a rising edge specified as
percentage of amplitude.
-Overshoot -- Amount of overshoot following a rising edge specified as
percentage of amplitude.
Standard Horizontal Parameters
Rise Time 10-90% -- Detects the first rise to pass through 50% of the amplitude
(top - base) of the waveform within the measurement section, and then
measures the time of transition from 10% to 90% at that rise.
measures the time of transition from 10% to 90% at that rise.
Rise Time 20-80% -- Detects the first rise to pass through 50% of the amplitude
(top - base) of the waveform within the measurement section, and then
measures the time of transition from 20% to 80% at that rise.
measures the time of transition from 20% to 80% at that rise.
Fall Time 80-20% -- Detects the first fall to pass through 50% of the amplitude
(top - base) of the waveform within the measurement section, and then
measures the time of transition from 80% to 20% at that fall.
measures the time of transition from 80% to 20% at that fall.
Fall Time 90-10% -- Detects the first fall to pass through 50% of the amplitude
(top - base) of the waveform within the measurement section, and then
measures the time of transition from 90% to 10% at that fall.
measures the time of transition from 90% to 10% at that fall.
Frequency -- Period of cyclic signal measured as time between every other pair
of 50% crossings. Starting with first transition after left cursor, the period is
measured for each transition pair. Values then averaged and reciprocal used to
give frequency.
measured for each transition pair. Values then averaged and reciprocal used to
give frequency.
Period -- Period of a cyclic signal measured as time between every other pair of
50% crossings. Starting with first transition after left cursor, period is measured
for each transition pair, with values averaged to give final result.
for each transition pair, with values averaged to give final result.
No. of +Pulses -- An integer number of positive pulses.
No. of -Pulses -- An integer number of negative pulses.
+Pulse Width -- Measures the time from the first rise until the first fall to pass
through 50% of the amplitude (top-base) of the waveform within the
measurement section.
measurement section.
-Pulse Width -- Measures the time from the first fall until the first rise to pass
through 50% of the amplitude (top-base) of the waveform within the
measurement section.
measurement section.
Duty Cycle -- Width as percentage of period.