Agilent Technologies E1439 manual Bit real, Post trigger, Pre-trigger

	Agilent E1439 Programmer's Reference
	Functions listed alphabetically
	Parameters
id	is the VXI instrument session pointer returned by the age1439_init function.
adcLevel	is used to set the triggering signal threshold when using the ADC trigger source. This threshold is
	(full scale × adclevel/2048), where −2048 ≤adclevel ≤2047. There is hysteresis around the
	threshold in order to prevent multiple triggers from a single threshold crossing. Hysteresis is 20
	ADC counts, or about 1% full scale.
	Use AGE1439_ADC_LEVEL_MAX to set the maximum allowable level.
	Use AGE1439_ADC_LEVEL_MIN to set the minimum allowable level.
	Use AGE1439_ADC_LEVEL_DEF to set the default ADC trigger threshold.
	An accurate value of full scale (in volts) can be found by:
	full scale = (age1439_data_scale_get * 2^N)/k
	where N = 15 if age1439_data_resolution == AGE1439_12_BIT
	N = 29 if age1439_data_resolution == AGE1439_24_BIT

and k = 2 if age1439_filter_decimate == AGE1439_DECIMATE_SHIFT

k= 2 if age1439_data_type == AGE1439_REAL and age1439_frequency_center is non-zero k = 1 otherwise

adcLevelPtr	points to the current value of the adclevel parameter.
trigDelay	is the time delay, in units of output samples, between when a trigger is received and the first data
	point in the output data.
	AGE1439_TRIG_DELAY_MIN selects the minimum allowable trigger delay.
	AGE1439_TRIG_DELAY_MAX selects the maximum allowable trigger delay.
	AGE1439_TRIG_DELAY_DEF sets the default trigger delay.
	Negative values indicate a pre-trigger condition where samples prior to the trigger event are
	included in the output data. The amount of pre-trigger delay is limited to the number of samples
	which can be saved in the buffer memory. See the age1439_data_setup function description for
	the number of bytes used per sample. The delay limits depend on the data type as follows:
	Trigger delay in output samples (DRAMsize in bytes)
			24 bit real
		24 bit complex	12 bit complex	12 bit real
	Post trigger	2^31−1	2^31−1	2^31−1
	Pre-trigger	48−(DRAMsize/6)	48−(DRAMsize/3)	48−(DRAMsize/1.5)
	If trigDelay is < (Pre-trigger) a bad parameter error is set.
trigDelayPtr	points to the current value of the of delay.
genTrig	determines whether a module may generate a trigger.
	AGE1439_GENERATE_ON enables triggering.

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