Teledyne LeCroy PXD222 - Manual (Page 25)

Operation
PXD222-OM-E Rev A ISSUED: November 2001
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WIDTH: A width trigger occurs when the oscilloscope detects a positive or negative pulse width
between or, optionally, outside the width thresholds. The trigger does not actually occur until the
edge of a pulse that corresponds to the specified width thresholds and polarity crosses the trigger
level. The width thresholds, whether to trigger on pulse widths that are within or outside the width
thresholds, the polarity of the pulse, and the trigger level are configured with the function
LcPXD222_ConfigureWidthTriggerSource.
TV: The PXD 222 Digitizer can trigger on NTCS, PAL and SECAM video signals. The TV signal
type, the field and line number on which to trigger, and the signal polarity are configured with the
function LcPXD222_ConfigureTVTriggerSource.
IMMEDIATE: In this mode, the oscilloscope does not wait for trigger event and instead immedi-
ately begins the digitization process.
D. PXD 222 DIGITIZER WAVEFORM MEASUREMENTS
The PXD 222 Digitizer performs the following waveform measurements:
Mean Voltage LCPXD222_VAL_VOLTAGE_AVERAGE
RMS Voltage (AC) LCPXD222_VAL_VOLTAGE_RMS
True RMS Voltage (AC+DC) LCPXD222_VAL_VOLTAGE_TRUE_RMS
Peak to Peak voltage LCPXD222_VAL_VOLTAGE_PEAK_TO_PEAK
Maximum Peak voltage LCPXD222_VAL_VOLTAGE_MAX
Minimum Peak voltage LCPXD222_VAL_VOLTAGE_MIN
Neg Duty Cycle percentage LCPXD222_VAL_DUTY_CYCLE_NEG
Pos Duty Cycle percentage LCPXD222_VAL_DUTY_CYCLE_POS
Frequency LCPXD222_VAL_FREQUENCY
Neg Pulse Width LCPXD222_VAL_WIDTH_NEG
Pos Pulse Width LCPXD222_VAL_WIDTH_POS
Phase Difference LCPXD222_VAL_PHASE
To read out a waveform measurement, use the LcPXD222_ReadWaveformMeasurement func-
tion. To read back both the measurement and the waveform, call the function.
LcPXD222_FetchWaveform after calling LcPXD222_ReadWaveformMeasurement.