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An Advance Trigger causes a switch device to execute the next entry in its instruction (scan) list. You can configure this trigger to occur on a digital edge or when the Send Software Trigger function/VI ...

The following table lists the revised names for analog input terminal names. Original Terminal Names Revised Terminal Names Explanation AIGND, ACHGND AIGND The reference point for referenced single-ended ...

A window trigger occurs when an analog signal either passes into (enters) or passes out of (leaves) a window defined by two voltage levels. Specify the levels by setting the window top value and the window ...

An analog level trigger is similar to an analog edge trigger. With both trigger types, you specify the edge—rising or falling—and the trigger level. With an analog edge trigger, you are interested in the ...

An analog multi edge trigger functions similar to an analog edge trigger. The analog multi edge trigger differs in that you can configure multiple channel sources acquiring in the same task to each have ...

For analog edge triggering, you configure the measurement device to look for a certain signal level and slope (either rising or falling). After the device identifies the trigger condition, the device performs ...

The following table lists the revised names for analog output terminal names. Original Terminal Names Revised Terminal Names Explanation DAC0OUT AO0 An analog output channel DAC1OUT AO1 An analog output ...

When you configure an Arm Start Trigger, a counter task does not respond to any Start Triggers until after the Arm Start Trigger occurs. You can configure this trigger to occur on a digital edge or at ...

A buffer is a temporary storage in computer memory for acquired or to-be-generated samples. Typically this storage is allocated from your computer's memory and is also called the task buffer. For input ...

Input Tasks If your acquisition is finite (sample mode on the Timing function/VI set to Finite Samples), NI-DAQmx allocates a buffer equal in size to the value of the samples per channel attribute/property. ...

You can specify the size of the buffer by calling the DAQmx Configure Buffer function/VI, by specifying the buffer size attribute/property in the buffer property node, or by writing a number of pulse specifications ...

For devices that support burst handshake timing, three signals are used: Pause Trigger (formerly called REQ) Ready for Transfer Event (formerly called ACK) sample clock For digital input tasks, when the ...

There are two types of calibration, channel calibration and device calibration.

You can configure a variety of triggers with pulse generations. All pulse generations support Start Triggers. Single pulse generation and finite pulse train generation also support the Retriggerable attribute/property, ...

Channel calibration is a technique used to achieve higher measurement accuracy. In most applications, device calibration provides sufficient accuracy. However, in applications where the highest degree ...

A physical channel is a terminal or pin at which you can measure or generate an analog or digital signal. A single physical channel can include more than one terminal, as in the case of a differential ...

Virtual channels and tasks are fundamental components of NI-DAQmx. Virtual channels, or sometimes referred to generically as channels, are software entities that encapsulate the physical channel along ...

On devices with built-in cold-junction compensation (CJC) channels, the CJC channel is read once per sample clock edge.

Frequencies of clocks must be evenly divisible into the frequency of their timebase. For example, the rate of the Sample Clock must be evenly divisible into the frequency of the Sample Clock Timebase. ...

Periodic digital edges measure time and are called clocks. Clocks such as a sample timebase clock and the 20 MHz timebase clock mark the passing of time or are used to align other signals in time. Clocks ...

When a value you set cannot be met exactly, NI-DAQmx sometimes adjusts—or coerces—that value to a valid one. Coercion often occurs when an attribute/property supports a set of discrete ranges. After you ...

NI-DAQmx programs some of the settings for the resources when the task is committed. These settings might be the rate of a clock or the input limits of a channel on a device, the direction of a trigger ...

When the task resources that perform the specified operation are released, the task transitions from the Committed state to the Verified state. These resources may be clocks or channels on a device, trigger ...

To configure a measurement, specify the initial sensor position through the Initial Angle attribute/property. You also can specify if the Z Input Terminal is used with the Z Index Enable attribute/property. ...

To configure a measurement, you specify the expected range of the input signal. Based on this range, NI-DAQmx automatically picks the internal timebase that provides the highest resolution for your measurement ...

The NI-DAQmx API uses circular buffers as shown in the following figure. For input operations, portions of data are read from the buffer while the buffer is filled. Likewise for output operations, portions ...

Requirement The I/O must be hardware-timed. All output values need to simultaneously update at the arrival of the sample clock edge. Solution Use the DAQmx Wait For Next Sample Clock function/VI to verify ...

Requirement The I/O needs to be hardware-timed. All output values need to simultaneously update at the arrival of the sample clock edge. Data needs to be exchanged between a time-critical loop and lower-priority ...

Requirement An analog input task must be hardware-timed. The output task does not need hardware synchronization with the sample clock edge. Solution Use the DAQmx real-time Report Missed Samples attribute/property, ...

Requirement Use hardware-timed counter input operations to drive a control loop. Solution Use the Wait For Next Sample Clock function/VI to synchronize the counter operations with the counter's sample ...

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