User Manual

PicoScope 4000 Series Programmer's Guide 83

4.10.55.1

TRIGGER_CHANNEL_PROPERTIES structure

A structure of this type is passed to ps4000SetTriggerChannelProperties in the

channelProperties argument to specify the trigger mechanism, and is defined as

follows: -

typedef struct tTriggerChannelProperties

{

short thresholdUpper;

unsigned short thresholdUpperHysteresis;

short thresholdLower;

unsigned short thresholdLowerHysteresis;

PS4000_CHANNEL channel;

THRESHOLD_MODE thresholdMode;

} TRIGGER_CHANNEL_PROPERTIES

Elements

thresholdUpper, the upper threshold at which the trigger must

fire. This is scaled in 16-bit ADC counts at the currently selected

range for that channel.

thresholdUpperHysteresis, the hysteresis by which the trigger

must exceed the upper threshold before it will fire. It is scaled in 16-

bit counts.

thresholdLower, the lower threshold at which the trigger must

fire. This is scaled in 16-bit ADC counts at the currently selected

range for that channel.

thresholdLowerHysteresis, the hysteresis by which the trigger

must exceed the lower threshold before it will fire. It is scaled in 16-

bit counts.

channel, the channel to which the properties apply. See

ps4000SetChannel for possible values.

thresholdMode, either a level or window trigger. Use one of these

constants: -

LEVEL

WINDOW