Acqiris U5309A User Manual page 25

Parameters
ActiveSource (IAqMD3Trigger.ActiveSource property): Specifies the trigger source.
There are three trigger sources: internal, external and self-trigger. If the Self-Trigger mode is selected
the Self-Trigger parameters should be set and the IO 3 output should be enabled.
Frequency (IAqMD3TriggerSourceSelfTriggerSquareWave Interface): Specifies the
frequency of the Self-Trigger square wave signal. The units are Hertz.
DutyCycle (IAqMD3TriggerSourceSelfTriggerSquareWave Interface): Configures
the duty cycle of the Self-Trigger square wave signal. Units are percentage of the period.
Slope (IAqMD3TriggerSourceSelfTriggerSquareWave Interface): Specifies whether
a rising or a falling edge of the generated waveform triggers the acquisition card.
Out-AveragerAwg (ControlIOs interface): Self-Trigger signal is propagated through the IO
3.
Post trigger delay
The post trigger delay step depends on sampling rate and channel options, it can be summarized as
follow:
U5309A
-SR2
-SR1
-SR0
Table 2.4 - Post-trigger delay granularity.
Multi-purpose inputs and outputs (IO 1, 2)
The multi-purpose inputs and outputs (IO 1, 2) in the front panel may be used to control the
accumulation or read the ADC card status:
Parameters (ControlIO interface)
In-AccumulationEnable: ADC card input (IO 1). This signal controls the execution of the
averaging sequence by checking its value only at the averager start. If the accumulation enable is '1'
at the start, the averager will perform the average independently of this input value. By the contrary, if
the accumulation enable is '0' at the start, the ADC card will wait until the accumulation enable rises to
start the averaging at that moment (no need for a new start).
Out-AccumulationActive: ADC card output (IO 2). This signal informs that the ADC card is busy
accumulating.
Out-AcquisitionActive: ADC card output (IO 1 or IO 2). This signal informs that the ADC card is
busy acquiring.
U5309A User's Manual
-CH1 -CH2
multiple of 16 ns
multiple of 32 ns
multiple of 64 ns
Not supported
multiple of 16 ns
multiple of 32 ns
2.4 Real-time averaging (AVG option)
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