Hysteresis

The channel trigger hysteresis property is used to control the sensitivity of the trigger system. More...

Functions
uint32_t	ScpChTrGetHysteresisCount (TpDeviceHandle_t hDevice, uint16_t wCh)
	Get the number of trigger hystereses for a specified channel with the current trigger kind.
double	ScpChTrGetHysteresis (TpDeviceHandle_t hDevice, uint16_t wCh, uint32_t dwIndex)
	Get the currently set channel trigger hysteresis value for a specified channel and trigger hysteresis.
double	ScpChTrSetHysteresis (TpDeviceHandle_t hDevice, uint16_t wCh, uint32_t dwIndex, double dHysteresis)
	Set the channel trigger hysteresis value for a specified channel and trigger hysteresis.

Detailed Description

The channel trigger hysteresis property is used to control the sensitivity of the trigger system.

The number of available trigger hystereses depends on the currently set trigger kind. Use ScpChTrGetHysteresisCount to determine the number of trigger hystereses for the currently set trigger kind.

The trigger hysteresis is set as a floating point value between 0 and 1, corresponding to a percentage of the full scale input range:

• 0.0 (0%) equals 0 Volt (no hysteresis)
• 0.5 (50%) equals full scale
• 1.0 (100%) equals 2 * full scale.

By default the trigger hysteresis is set to 0.05 (5%) of the full-scale range.

Function Documentation

double ScpChTrGetHysteresis	(	TpDeviceHandle_t	hDevice,
		uint16_t	wCh,
		uint32_t	dwIndex
	)

Get the currently set channel trigger hysteresis value for a specified channel and trigger hysteresis.

Parameters

hDevice	A device handle.
wCh	Channel number, 0 to ScpGetChannelCount() - 1.
dwIndex	Trigger hysteresis index, 0 to ScpChTrGetHysteresisCount() - 1.

Returns

The currently set trigger hysteresis value, a number between 0 and 1.

uint32_t ScpChTrGetHysteresisCount	(	TpDeviceHandle_t	hDevice,
		uint16_t	wCh
	)

Get the number of trigger hystereses for a specified channel with the current trigger kind.

Parameters

hDevice	A device handle.
wCh	Channel number, 0 to ScpGetChannelCount() - 1.

Returns

The number of available trigger hystereses for the currently set trigger kind.

See Also

ScpChTrGetKind

ScpChTrGetHysteresis

ScpChTrSetHysteresis

double ScpChTrSetHysteresis	(	TpDeviceHandle_t	hDevice,
		uint16_t	wCh,
		uint32_t	dwIndex,
		double	dHysteresis
	)

Set the channel trigger hysteresis value for a specified channel and trigger hysteresis.

Parameters

hDevice	A device handle.
wCh	Channel number, 0 to ScpGetChannelCount() - 1.
dwIndex	Trigger hysteresis index, 0 to ScpChTrGetHysteresisCount() - 1.
dHysteresis	The required trigger hysteresis value, a number between 0 and 1.

Returns

The actually set trigger hysteresis value, a number between 0 and 1.