DIChannel Properties
- Updated2023-02-21
- 5 minute(s) read
DIChannel Properties
The DIChannel type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | AcquireOn | Specifies on which edge of the sample clock to acquire samples. |
| DataTransferMechanism | Specifies the data transfer mode for the device. |
| DataTransferRequestCondition | Specifies under what condition to transfer data from the onboard memory of the device to the buffer. |
| Description | Specifies a user-defined description for the channel. (Inherited from Channel.) |
| DigitalFilterEnable | Specifies whether to enable the digital filter for the line(s) or port(s). You can enable the filter on a line-by-line basis. You do not have to enable the filter for all lines in a channel. |
| DigitalFilterEnableBusMode | Specifies whether to enable bus mode for digital filtering. If you set this property to , NI-DAQmx treats all lines that use common filtering settings as a bus. If any line in the bus has jitter, all lines in the bus hold state until the entire bus stabilizes, or until 2 times the minimum pulse width elapses. If you set this property to , NI-DAQmx filters all lines individually. Jitter in one line does not affect other lines. |
| DigitalFilterMinimumPulseWidth | Specifies in seconds the minimum pulse width the filter recognizes as a valid high or low state transition. |
| DigitalFilterTimebaseRate | Specifies in hertz the rate of the digital filter timebase. NI-DAQmx uses this value to compute settings for the filter. |
| DigitalFilterTimebaseSource | Specifies the terminal of the signal to use as the timebase of the digital filter. |
| DigitalSynchronizationEnable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. |
| InvertLines | Specifies whether to invert the lines in the channel. If you set this property to , the lines are at high logic when off and at low logic when on. |
| IsGlobal | Indicates whether the channel is a global channel. (Inherited from Channel.) |
| LogicFamily | Specifies the logic family to use for acquisition. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to the device documentation for information on the logic high and logic low voltages for these logic families. |
| MemoryMappingEnable | Specifies for NI-DAQmx to map hardware registers to the memory space of the application, if possible. Normally, NI-DAQmx maps hardware registers to memory accessible only to the kernel. Mapping the registers to the memory space of the application increases performance. However, if the application accesses the memory space mapped to the registers, it can adversely affect the operation of the device and possibly result in a system crash. |
| NumberOfLines | Indicates the number of digital lines in the channel. |
| PhysicalName | Specifies the name of the physical channel upon which this virtual channel is based. (Inherited from Channel.) |
| SynchronizationUnlockBehavior | Specifies the action to take if the target loses its synchronization to the grand master. (Inherited from Channel.) |
| Tristate | Specifies whether to tristate the lines in the channel. If you set this property to , NI-DAQmx tristates the lines in the channel. If you set this property to , NI-DAQmx does not modify the configuration of the lines even if the lines were previously tristated. Set this property to to read lines in other tasks or to read output-only lines. |
| Type | Indicates the type of the virtual channel. (Inherited from Channel.) |
| UsbTransferRequestCount | Specifies the maximum number of simultaneous USB transfers used to stream data. Modify this value to affect performance under different combinations of operating system and device. |
| UsbTransferRequestSize | Specifies the maximum size of a USB transfer request in bytes. Modify this value to affect performance under different combinations of operating system and device. |
| VirtualName | Gets the name of the virtual channel. (Inherited from Channel.) |