DAQmx Channel Properties
Use the DAQmx Channel properties to configure virtual channels.
| Property | Description |
|---|---|
| Active Channels (if subset) | Specifies a virtual channel or list of virtual channels to modify. The virtual channels are within the context of a specific task. NI-DAQmx configures all channels in the task if you do not set this property. Details |
| Analog Input:Maximum Value | Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the device can measure with the current settings. Details |
| Analog Input:Minimum Value | Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the device can measure with the current settings. Details |
| Analog Input:Custom Scale Name | Specifies the name of a custom scale for the channel. Details |
| Analog Input:Measurement Type | Indicates the measurement to take with the analog input channel and in some cases, such as for temperature measurements, the sensor to use. Details |
| Analog Input:Voltage:Units | Specifies the units to use to return voltage measurements from the channel. Details |
| Analog Input:Voltage:dB Reference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. Details |
| Analog Input:Voltage:AC RMS Voltage:Units | Specifies the units to use to return voltage RMS measurements from the channel. Details |
| Analog Input:Temperature:Units | Specifies the units to use to return temperature measurements from the channel. Details |
| Analog Input:Temperature:Thermocouple:Type | Specifies the type of thermocouple connected to the channel. Thermocouple types differ in composition and measurement range. Details |
| Analog Input:Temperature:Thermocouple:Scale Type | Specifies the method or equation form that the thermocouple scale uses. Details |
| Analog Input:Temperature:Thermocouple:CJC Source | Indicates the source of cold-junction compensation. Details |
| Analog Input:Temperature:Thermocouple:CJC Value | Specifies the temperature of the cold junction if AI.Thrmcpl.CJCSrc is Constant Value. Specify this value in the units of the measurement. Details |
| Analog Input:Temperature:Thermocouple:CJC Channel | Indicates the channel that acquires the temperature of the cold junction if AI.Thrmcpl.CJCSrc is Channel. If the channel is a temperature channel, NI-DAQmx acquires the temperature in the correct units. Other channel types, such as a resistance channel with a custom sensor, must use a custom scale to scale values to degrees Celsius. Details |
| Analog Input:Temperature:RTD:Type | Specifies the type of RTD connected to the channel. Details |
| Analog Input:Temperature:RTD:R0 | Specifies in ohms the sensor resistance at 0 deg C. The Callendar-Van Dusen equation requires this value. Refer to the sensor documentation to determine this value. Details |
| Analog Input:Temperature:RTD:Custom:A | Specifies the 'A' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details |
| Analog Input:Temperature:RTD:Custom:B | Specifies the 'B' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details |
| Analog Input:Temperature:RTD:Custom:C | Specifies the 'C' constant of the Callendar-Van Dusen equation. NI-DAQmx requires this value when you use a custom RTD. Details |
| Analog Input:Temperature:Thermistor:A | Specifies the 'A' constant of the Steinhart-Hart thermistor equation. Details |
| Analog Input:Temperature:Thermistor:B | Specifies the 'B' constant of the Steinhart-Hart thermistor equation. Details |
| Analog Input:Temperature:Thermistor:C | Specifies the 'C' constant of the Steinhart-Hart thermistor equation. Details |
| Analog Input:Temperature:Thermistor:R1 | Specifies in ohms the value of the reference resistor if you use voltage excitation. NI-DAQmx ignores this value for current excitation. Details |
| Analog Input:Temperature:Advanced:Force Read from Channel | Specifies whether to read from the channel if it is a cold-junction compensation channel. By default, DAQmx Read does not return data from cold-junction compensation channels. Setting this property to TRUE forces read operations to return the cold-junction compensation channel data with the other channels in the task. Details |
| Analog Input:Current:Units | Specifies the units to use to return current measurements from the channel. Details |
| Analog Input:Current:AC RMS Current:Units | Specifies the units to use to return current RMS measurements from the channel. Details |
| Analog Input:Strain:Units | Specifies the units to use to return strain measurements from the channel. Details |
| Analog Input:Strain:Strain Gage:Gage Factor | Specifies the sensitivity of the strain gage. Gage factor relates the change in electrical resistance to the change in strain. Refer to the sensor documentation for this value. Details |
| Analog Input:Strain:Strain Gage:Poisson Ratio | Specifies the ratio of lateral strain to axial strain in the material you are measuring. Details |
| Analog Input:Strain:Strain Gage:Configuration | Specifies the bridge configuration of the strain gages. Details |
| Analog Input:Resistance:Units | Specifies the units to use to return resistance measurements. Details |
| Analog Input:Frequency:Units | Specifies the units to use to return frequency measurements from the channel. Details |
| Analog Input:Frequency:Voltage:Threshold Level | Specifies the voltage level at which to recognize waveform repetitions. You should select a voltage level that occurs only once within the entire period of a waveform. You also can select a voltage that occurs only once while the voltage rises or falls. Details |
| Analog Input:Frequency:Voltage:Hysteresis | Specifies in volts a window below AI.Freq.ThreshVoltage. The input voltage must pass below AI.Freq.ThreshVoltage minus this value before NI-DAQmx recognizes a waveform repetition at AI.Freq.ThreshVoltage. Hysteresis can improve the measurement accuracy when the signal contains noise or jitter. Details |
| Analog Input:Position:LVDT:Units | Specifies the units to use to return linear position measurements from the channel. Details |
| Analog Input:Position:LVDT:Sensitivity | Specifies the sensitivity of the LVDT. This value is in the units you specify with AI.LVDT.SensitivityUnits. Refer to the sensor documentation to determine this value. Details |
| Analog Input:Position:LVDT:Sensitivity Units | Specifies the units of AI.LVDT.Sensitivity. Details |
| Analog Input:Position:RVDT:Units | Specifies the units to use to return angular position measurements from the channel. Details |
| Analog Input:Position:RVDT:Sensitivity | Specifies the sensitivity of the RVDT. This value is in the units you specify with AI.RVDT.SensitivityUnits. Refer to the sensor documentation to determine this value. Details |
| Analog Input:Position:RVDT:Sensitivity Units | Specifies the units of AI.RVDT.Sensitivity. Details |
| Analog Input:Sound Pressure:Maximum Sound Pressure Level | Specifies the maximum instantaneous sound pressure level you expect to measure. This value is in decibels, referenced to 20 micropascals. NI-DAQmx uses the maximum sound pressure level to calculate values in pascals for AI.Max and AI.Min for the channel. Details |
| Analog Input:Sound Pressure:Units | Specifies the units to use to return sound pressure measurements from the channel. Details |
| Analog Input:Sound Pressure:dB Reference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. NI-DAQmx also uses the decibel reference level when converting AI.SoundPressure.MaxSoundPressureLvl to a voltage level. Details |
| Analog Input:Sound Pressure:Microphone:Sensitivity | Specifies the sensitivity of the microphone. This value is in mV/Pa. Refer to the sensor documentation to determine this value. Details |
| Analog Input:Acceleration:Units | Specifies the units to use to return acceleration measurements from the channel. Details |
| Analog Input:Acceleration:dB Reference | Specifies the decibel reference level in the units of the channel. When you read samples as a waveform, the decibel reference level is included in the waveform attributes. Details |
| Analog Input:Acceleration:Accelerometer:Sensitivity | Specifies the sensitivity of the accelerometer. This value is in the units you specify with AI.Accel.SensitivityUnits. Refer to the sensor documentation to determine this value. Details |
| Analog Input:Acceleration:Accelerometer:Sensitivity Units | Specifies the units of AI.Accel.Sensitivity. Details |
| Analog Input:TEDS:Is TEDS | Indicates if the virtual channel was initialized using a TEDS bitstream from the corresponding physical channel. Details |
| Analog Input:TEDS:Units | Indicates the units defined by TEDS information associated with the channel. Details |
| Analog Input:General Properties:Input Configuration:Coupling | Specifies the coupling for the channel. Details |
| Analog Input:General Properties:Input Configuration:Impedance | Specifies the input impedance of the channel. Details |
| Analog Input:General Properties:Input Configuration:Terminal Configuration | Specifies the terminal configuration for the channel. Details |
| Analog Input:General Properties:Input Configuration:Input Source | Specifies the source of the channel. You can use the signal from the I/O connector or one of several calibration signals. Certain devices have a single calibration signal bus. For these devices, you must specify the same calibration signal for all channels you connect to a calibration signal. Details |
| Analog Input:General Properties:Signal Conditioning:Resistance Configuration | Specifies the resistance configuration for the channel. NI-DAQmx uses this value for any resistance-based measurements, including temperature measurement using a thermistor or RTD. Details |
| Analog Input:General Properties:Signal Conditioning:Lead Wire Resistance | Specifies in ohms the resistance of the wires that lead to the sensor. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Configuration | Specifies the type of Wheatstone bridge that the sensor is. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Nominal Resistance | Specifies in ohms the resistance across each arm of the bridge in an unloaded position. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Initial Bridge Voltage | Specifies in volts the output voltage of the bridge in the unloaded condition. NI-DAQmx subtracts this value from any measurements before applying scaling equations. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal Enable | Specifies whether to enable a shunt calibration switch. Use AI.Bridge.ShuntCal.Select to select the switch(es) to enable. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Shunt Cal Select | Specifies which shunt calibration switch(es) to enable. Use AI.Bridge.ShuntCal.Enable to enable the switch(es) you specify with this property. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Shunt Cal:Gain Adjustment | Specifies the result of a shunt calibration. NI-DAQmx multiplies data read from the channel by the value of this property. This value should be close to 1.0. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Balance:Coarse Potentiometer | Specifies by how much to compensate for offset in the signal. This value can be between 0 and 127. Details |
| Analog Input:General Properties:Signal Conditioning:Bridge:Balance:Fine Potentiometer | Specifies by how much to compensate for offset in the signal. This value can be between 0 and 4095. Details |
| Analog Input:General Properties:Signal Conditioning:Current Shunt Resistor:Location | Specifies the shunt resistor location for current measurements. Details |
| Analog Input:General Properties:Signal Conditioning:Current Shunt Resistor:Value | Specifies in ohms the external shunt resistance for current measurements. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Source | Specifies the source of excitation. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Value | Specifies the amount of excitation that the sensor requires. If AI.Excit.VoltageOrCurrent is Voltage, this value is in volts. If AI.Excit.VoltageOrCurrent is Current, this value is in amperes. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Use Excitation For Scaling | Specifies if NI-DAQmx divides the measurement by the excitation. You should typically set this property to TRUE for ratiometric transducers. If you set this property to TRUE, set AI.Max and AI.Min to reflect the scaling. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Use Multiplexed Excitation | Specifies if the SCXI-1122 multiplexes the excitation to the upper half of the channels as it advances through the scan list. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Actual Excitation Value | Specifies the actual amount of excitation supplied by an internal excitation source. If you read an internal excitation source more precisely with an external device, set this property to the value you read. NI-DAQmx ignores this value for external excitation. When performing shunt calibration, some devices set this property automatically. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:DC or AC | Specifies if the excitation supply is DC or AC. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:Advanced:Voltage or Current | Specifies if the channel uses current or voltage excitation. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Frequency | Specifies the AC excitation frequency in Hertz. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Synchronization Enable | Specifies whether to synchronize the AC excitation source of the channel to that of another channel. Synchronize the excitation sources of multiple channels to use multichannel sensors. Set this property to FALSE for the master channel and to TRUE for the slave channels. Details |
| Analog Input:General Properties:Signal Conditioning:Excitation:AC Excitation:Wire Mode | Specifies the number of leads on the LVDT or RVDT. Some sensors require you to tie leads together to create a four- or five- wire sensor. Refer to the sensor documentation for more information. Details |
| Analog Input:General Properties:Signal Conditioning:Probe/Attenuator:Attenuation Value | Specifies the amount of attenuation to use. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Enable | Specifies whether to enable the lowpass filter of the channel. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Cutoff Frequency | Specifies the frequency in Hertz that corresponds to the -3dB cutoff of the filter. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Advanced:Switched Capacitor:Clock Source | Specifies the source of the filter clock. If you need a higher resolution for the filter, you can supply an external clock to increase the resolution. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Advanced:Switched Capacitor:External Clock Frequency | Specifies the frequency of the external clock when you set AI.Lowpass.SwitchCap.ClkSrc to External. NI-DAQmx uses this frequency to set the pre- and post- filters on the SCXI-1141, SCXI-1142, and SCXI-1143. On those devices, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Advanced:Switched Capacitor:External Clock Divisor | Specifies the divisor for the external clock when you set AI.Lowpass.SwitchCap.ClkSrc to External. On the SCXI-1141, SCXI-1142, and SCXI-1143, NI-DAQmx determines the filter cutoff by using the equation f/(100*n), where f is the external frequency, and n is the external clock divisor. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details |
| Analog Input:General Properties:Filter:Analog Lowpass:Advanced:Switched Capacitor:Output Clock Divisor | Specifies the divisor for the output clock. NI-DAQmx uses the cutoff frequency to determine the output clock frequency. Refer to the SCXI-1141/1142/1143 User Manual for more information. Details |
| Analog Input:General Properties:Digitizer/ADC:Resolution Units | Indicates the units of AI.Resolution. Details |
| Analog Input:General Properties:Digitizer/ADC:Resolution Value | Indicates the resolution of the analog-to-digital converter of the channel. This value is in the units you specify with AI.ResolutionUnits. Details |
| Analog Input:General Properties:Digitizer/ADC:Raw Sample Size | Indicates in bits the size of a raw sample from the device. Details |
| Analog Input:General Properties:Digitizer/ADC:Raw Sample Justification | Indicates the justification of a raw sample from the device. Details |
| Analog Input:General Properties:Digitizer/ADC:Timing Mode | Specifies the ADC timing mode, controlling the tradeoff between speed and effective resolution. Some ADC timing modes provide increased powerline noise rejection. On devices that have an AI Convert clock, this setting affects both the maximum and default values for AIConv.Rate. You must use the same ADC timing mode for all channels on a device, but you can use different ADC timing modes for different device in the same task. Details |
| Analog Input:General Properties:Digitizer/ADC:Dither:Enable | Specifies whether to enable dithering. Dithering adds Gaussian noise to the input signal. You can use dithering to achieve higher resolution measurements by over sampling the input signal and averaging the results. Details |
| Analog Input:General Properties:Channel Calibration:Has Valid Calibration Information | Indicates if the channel has calibration information. Details |
| Analog Input:General Properties:Channel Calibration:Enable Calibration | Specifies whether to enable the channel calibration associated with the channel. Details |
| Analog Input:General Properties:Channel Calibration:Apply Calibration If Expired | Specifies whether to apply the channel calibration to the channel after the expiration date has passed. Details |
| Analog Input:General Properties:Channel Calibration:Calibration Date | Specifies the last date and time that the channel underwent a channel calibration. Details |
| Analog Input:General Properties:Channel Calibration:Expiration Date | Specifies the date and time that the channel calibration expires. Details |
| Analog Input:General Properties:Channel Calibration:Scaling Parameters:Scale Type | Specifies the method or equation form that the calibration scale uses. Details |
| Analog Input:General Properties:Channel Calibration:Scaling Parameters:Table:Pre-Scaled Values | Specifies the reference values collected when calibrating the channel. Details |
| Analog Input:General Properties:Channel Calibration:Scaling Parameters:Table:Scaled Values | Specifies the acquired values collected when calibrating the channel. Details |
| Analog Input:General Properties:Channel Calibration:Scaling Parameters:Polynomial:Forward Coefficients | Specifies the forward polynomial values used for calibrating the channel. Details |
| Analog Input:General Properties:Channel Calibration:Scaling Parameters:Polynomial:Reverse Coefficients | Specifies the reverse polynomial values used for calibrating the channel. Details |
| Analog Input:General Properties:Channel Calibration:Operator Name | Specifies the name of the operator who performed the channel calibration. Details |
| Analog Input:General Properties:Channel Calibration:Description | Specifies the description entered for the calibration of the channel. Details |
| Analog Input:General Properties:Channel Calibration:Verification:Reference Values | Specifies the reference values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. Details |
| Analog Input:General Properties:Channel Calibration:Verification:Acquired Values | Specifies the acquired values collected when verifying the calibration. NI-DAQmx stores these values as a record of calibration accuracy and does not use them in the scaling process. Details |
| Analog Input:General Properties:Advanced:Range:High | Specifies the upper limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details |
| Analog Input:General Properties:Advanced:Range:Low | Specifies the lower limit of the input range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details |
| Analog Input:General Properties:Advanced:Gain:Gain Value | Specifies a gain factor to apply to the channel. Details |
| Analog Input:General Properties:Advanced:Sample and Hold Enable | Specifies whether to enable the sample and hold circuitry of the device. When you disable sample and hold circuitry, a small voltage offset might be introduced into the signal. You can eliminate this offset by using AI.AutoZeroMode to perform an auto zero on the channel. Details |
| Analog Input:General Properties:Advanced:High Accuracy Settings:Auto Zero Mode | Specifies how often to measure ground. NI-DAQmx subtracts the measured ground voltage from every sample. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism | Specifies the data transfer mode for the device. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition | Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Custom Threshold | Specifies the number of samples that must be in the FIFO to transfer data from the device if AI.DataXferReqCond is Onboard Memory Custom Threshold. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable | 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. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Compression:Raw Data Compression Type | Specifies the type of compression to apply to raw samples returned from the device. Details |
| Analog Input:General Properties:Advanced:Data Transfer and Memory:Compression:Lossy LSB Removal:Compressed Sample Size | Specifies the number of bits to return in a raw sample when AI.RawDataCompressionType is set to Lossy LSB Removal. Details |
| Analog Input:General Properties:Advanced:Device Scaling Coefficients:Device Scaling Coefficients | Indicates the coefficients of a polynomial equation that NI-DAQmx uses to scale values from the native format of the device to volts. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales or sensors contained by the channel. Details |
| Analog Input:General Properties:Advanced:Enhanced Alias Rejection Enable | Specifies whether to enable enhanced alias rejection. By default, enhanced alias rejection is enabled on supported devices. Leave this property set to the default value for most applications. Details |
| Analog Output:Maximum Value | Specifies the maximum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value larger than the maximum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a smaller value if other task settings restrict the device from generating the desired maximum. Details |
| Analog Output:Minimum Value | Specifies the minimum value you expect to generate. The value is in the units you specify with a units property. If you try to write a value smaller than the minimum value, NI-DAQmx generates an error. NI-DAQmx might coerce this value to a larger value if other task settings restrict the device from generating the desired minimum. Details |
| Analog Output:Custom Scale Name | Specifies the name of a custom scale for the channel. Details |
| Analog Output:Output Type | Indicates whether the channel generates voltage, current, or a waveform. Details |
| Analog Output:Voltage:Units | Specifies in what units to generate voltage on the channel. Write data to the channel in the units you select. Details |
| Analog Output:Voltage:Current Limit | Specifies the current limit, in amperes, for the voltage channel. Details |
| Analog Output:Current:Units | Specifies in what units to generate current on the channel. Write data to the channel in the units you select. Details |
| Analog Output:Function Generation:Type | Specifies the kind of the waveform to generate. Details |
| Analog Output:Function Generation:Frequency | Specifies the frequency of the waveform to generate in hertz. Details |
| Analog Output:Function Generation:Amplitude | Specifies the zero-to-peak amplitude of the waveform to generate in volts. Zero and negative values are valid. Details |
| Analog Output:Function Generation:Offset | Specifies the voltage offset of the waveform to generate. Details |
| Analog Output:Function Generation:Square:DutyCycle | Specifies the square wave duty cycle of the waveform to generate. Details |
| Analog Output:Function Generation:Modulation:Type | Specifies if the device generates a modulated version of the waveform using the original waveform as a carrier and input from an external terminal as the signal. Details |
| Analog Output:Function Generation:Modulation:FM Deviation | Specifies the FM deviation in hertz per volt when AO.FuncGen.ModulationType is FM. Details |
| Analog Output:General Properties:Output Configuration:Output Impedance | Specifies in ohms the impedance of the analog output stage of the device. Details |
| Analog Output:General Properties:Output Configuration:Load Impedance | Specifies in ohms the load impedance connected to the analog output channel. Details |
| Analog Output:General Properties:Output Configuration:Idle Output Behavior | Specifies the state of the channel when no generation is in progress. Details |
| Analog Output:General Properties:Output Configuration:Terminal Configuration | Specifies the terminal configuration of the channel. Details |
| Analog Output:General Properties:DAC:Resolution Units | Specifies the units of AO.Resolution. Details |
| Analog Output:General Properties:DAC:Resolution Value | Indicates the resolution of the digital-to-analog converter of the channel. This value is in the units you specify with AO.ResolutionUnits. Details |
| Analog Output:General Properties:DAC:Range:High | Specifies the upper limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details |
| Analog Output:General Properties:DAC:Range:Low | Specifies the lower limit of the output range of the device. This value is in the native units of the device. On E Series devices, for example, the native units is volts. Details |
| Analog Output:General Properties:DAC:Reference Voltage:Connect DAC Reference to Ground | Specifies whether to ground the internal DAC reference. Grounding the internal DAC reference has the effect of grounding all analog output channels and stopping waveform generation across all analog output channels regardless of whether the channels belong to the current task. You can ground the internal DAC reference only when AO.DAC.Ref.Src is Internal and AO.DAC.Ref.AllowConnToGnd is TRUE. Details |
| Analog Output:General Properties:DAC:Reference Voltage:Allow Connecting DAC Reference to Ground at Runtime | Specifies whether to allow grounding the internal DAC reference at run time. You must set this property to TRUE and set AO.DAC.Ref.Src to Internal before you can set AO.DAC.Ref.ConnToGnd to TRUE. Details |
| Analog Output:General Properties:DAC:Reference Voltage:Source | Specifies the source of the DAC reference voltage. The value of this voltage source determines the full-scale value of the DAC. Details |
| Analog Output:General Properties:DAC:Reference Voltage:External Source | Specifies the source of the DAC reference voltage if AO.DAC.Ref.Src is External. The valid sources for this signal vary by device. Details |
| Analog Output:General Properties:DAC:Reference Voltage:Value | Specifies in volts the value of the DAC reference voltage. This voltage determines the full-scale range of the DAC. Smaller reference voltages result in smaller ranges, but increased resolution. Details |
| Analog Output:General Properties:DAC:Offset Voltage:Source | Specifies the source of the DAC offset voltage. The value of this voltage source determines the full-scale value of the DAC. Details |
| Analog Output:General Properties:DAC:Offset Voltage:External Source | Specifies the source of the DAC offset voltage if AO.DAC.Offset.Src is External. The valid sources for this signal vary by device. Details |
| Analog Output:General Properties:DAC:Offset Voltage:Value | Specifies in volts the value of the DAC offset voltage. To achieve best accuracy, the DAC offset value should be hand calibrated. Details |
| Analog Output:General Properties:DAC:Reglitching Enable | Specifies whether to enable reglitching. The output of a DAC normally glitches whenever the DAC is updated with a new value. The amount of glitching differs from code to code and is generally largest at major code transitions. Reglitching generates uniform glitch energy at each code transition and provides for more uniform glitches. Uniform glitch energy makes it easier to filter out the noise introduced from glitching during spectrum analysis. Details |
| Analog Output:General Properties:Advanced:Gain:Gain Value | Specifies in decibels the gain factor to apply to the channel. Details |
| Analog Output:General Properties:Advanced:Data Transfer and Memory:Use Only Onboard Memory | Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory directly after you start the task. Onboard memory includes data FIFOs. Details |
| Analog Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism | Specifies the data transfer mode for the device. Details |
| Analog Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition | Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Details |
| Analog Output:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable | 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. Details |
| Analog Output:General Properties:Advanced:Device Scaling Coefficients:Device Scaling Coefficients | Indicates the coefficients of a linear equation that NI-DAQmx uses to scale values from a voltage to the native format of the device. Each element of the array corresponds to a term of the equation. For example, if index two of the array is 4, the third term of the equation is 4x^2. Scaling coefficients do not account for any custom scales that may be applied to the channel. Details |
| Analog Output:General Properties:Advanced:Enhanced Image Rejection Enable | Specifies whether to enable the DAC interpolation filter. Disable the interpolation filter to improve DAC signal-to-noise ratio at the expense of degraded image rejection. Details |
| Digital Input:Invert Lines | Specifies whether to invert the lines in the channel. If you set this property to TRUE, the lines are at high logic when off and at low logic when on. Details |
| Digital Input:Number of Lines | Indicates the number of digital lines in the channel. Details |
| Digital Input:Digital Filter:Enable | 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. Details |
| Digital Input:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes as a valid high or low state transition. Details |
| Digital Input:Tristate | Specifies whether to tristate the lines in the channel. If you set this property to TRUE, NI-DAQmx tristates the lines in the channel. If you set this property to FALSE, NI-DAQmx does not modify the configuration of the lines even if the lines were previously tristated. Set this property to FALSE to read lines in other tasks or to read output-only lines. Details |
| Digital Input:Logic Family | 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 device documentation for information on the logic high and logic low voltages for these logic families. Details |
| Digital Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism | Specifies the data transfer mode for the device. Details |
| Digital Input:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition | Specifies under what condition to transfer data from the onboard memory of the device to the buffer. Details |
| Digital Input:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable | 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. Details |
| Digital Input:General Properties:Advanced:Acquire On | Specifies on which edge of the sample clock to acquire samples. Details |
| Digital Output:Output Drive Type | Specifies the drive type for digital output channels. Details |
| Digital Output:Invert Lines | Specifies whether to invert the lines in the channel. If you set this property to TRUE, the lines are at high logic when off and at low logic when on. Details |
| Digital Output:Number of Lines | Indicates the number of digital lines in the channel. Details |
| Digital Output:Tristate | Specifies whether to stop driving the channel and set it to a high-impedance state. You must commit the task for this setting to take effect. Details |
| Digital Output:Line States:Start State | Specifies the state of the lines in a digital output task when the task starts. Details |
| Digital Output:Line States:Paused State | Specifies the state of the lines in a digital output task when the task pauses. Details |
| Digital Output:Line States:Done State | Specifies the state of the lines in a digital output task when the task completes execution. Details |
| Digital Output:Logic Family | Specifies the logic family to use for generation. A logic family corresponds to voltage thresholds that are compatible with a group of voltage standards. Refer to device documentation for information on the logic high and logic low voltages for these logic families. Details |
| Digital Output:General Properties:Advanced:Data Transfer and Memory:Use Only Onboard Memory | Specifies whether to write samples directly to the onboard memory of the device, bypassing the memory buffer. Generally, you cannot update onboard memory after you start the task. Onboard memory includes data FIFOs. Details |
| Digital Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Mechanism | Specifies the data transfer mode for the device. Details |
| Digital Output:General Properties:Advanced:Data Transfer and Memory:Data Transfer Request Condition | Specifies under what condition to transfer data from the buffer to the onboard memory of the device. Details |
| Digital Output:General Properties:Advanced:Data Transfer and Memory:Memory Mapping for Programmed IO Enable | 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. Details |
| Digital Output:General Properties:Advanced:Generate On | Specifies on which edge of the sample clock to generate samples. Details |
| Counter Input:Maximum Value | Specifies the maximum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced maximum value that the hardware can measure with the current settings. Details |
| Counter Input:Minimum Value | Specifies the minimum value you expect to measure. This value is in the units you specify with a units property. When you query this property, it returns the coerced minimum value that the hardware can measure with the current settings. Details |
| Counter Input:Custom Scale Name | Specifies the name of a custom scale for the channel. Details |
| Counter Input:Measurement Type | Indicates the measurement to take with the channel. Details |
| Counter Input:Frequency:Units | Specifies the units to use to return frequency measurements. Details |
| Counter Input:Frequency:Input Terminal | Specifies the input terminal of the signal to measure. Details |
| Counter Input:Frequency:Starting Edge | Specifies between which edges to measure the frequency of the signal. Details |
| Counter Input:Frequency:Measurement Specifications:Method | Specifies the method to use to measure the frequency of the signal. Details |
| Counter Input:Frequency:Measurement Specifications:High Frequency:Measurement Time | Specifies in seconds the length of time to measure the frequency of the signal if CI.Freq.MeasMeth is High Frequency with 2 Counters. Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. Details |
| Counter Input:Frequency:Measurement Specifications:Large Range:Divisor | Specifies the value by which to divide the input signal if CI.Freq.MeasMeth is Large Range with 2 Counters. The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. Details |
| Counter Input:Frequency:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Frequency:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Frequency:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Frequency:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Frequency:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Period:Units | Specifies the unit to use to return period measurements. Details |
| Counter Input:Period:Input Terminal | Specifies the input terminal of the signal to measure. Details |
| Counter Input:Period:Starting Edge | Specifies between which edges to measure the period of the signal. Details |
| Counter Input:Period:Measurement Specifications:Method | Specifies the method to use to measure the period of the signal. Details |
| Counter Input:Period:Measurement Specifications:High Frequency:Measurement Time | Specifies in seconds the length of time to measure the period of the signal if CI.Period.MeasMeth is High Frequency with 2 Counters. Measurement accuracy increases with increased measurement time and with increased signal frequency. If you measure a high-frequency signal for too long, however, the count register could roll over, which results in an incorrect measurement. Details |
| Counter Input:Period:Measurement Specifications:Large Range:Divisor | Specifies the value by which to divide the input signal if CI.Period.MeasMeth is Large Range with 2 Counters. The larger the divisor, the more accurate the measurement. However, too large a value could cause the count register to roll over, which results in an incorrect measurement. Details |
| Counter Input:Period:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Period:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Period:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Period:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Period:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Count Edges:Input Terminal | Specifies the input terminal of the signal to measure. Details |
| Counter Input:Count Edges:Count Direction:Direction | Specifies whether to increment or decrement the counter on each edge. Details |
| Counter Input:Count Edges:Count Direction:Terminal | Specifies the source terminal of the digital signal that controls the count direction if CI.CountEdges.Dir is Externally Controlled. Details |
| Counter Input:Count Edges:Count Direction:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Count Edges:Count Direction:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Count Edges:Count Direction:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Count Edges:Count Direction:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Count Edges:Count Direction:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Count Edges:Initial Count | Specifies the starting value from which to count. Details |
| Counter Input:Count Edges:Active Edge | Specifies on which edges to increment or decrement the counter. Details |
| Counter Input:Count Edges:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Count Edges:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Count Edges:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Count Edges:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Count Edges:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Position:Angular Encoder:Units | Specifies the units to use to return angular position measurements from the channel. Details |
| Counter Input:Position:Angular Encoder:Pulses Per Revolution | Specifies the number of pulses the encoder generates per revolution. This value is the number of pulses on either signal A or signal B, not the total number of pulses on both signal A and signal B. Details |
| Counter Input:Position:Angular Encoder:Initial Angle | Specifies the starting angle of the encoder. This value is in the units you specify with CI.AngEncoder.Units. Details |
| Counter Input:Position:Linear Encoder:Units | Specifies the units to use to return linear encoder measurements from the channel. Details |
| Counter Input:Position:Linear Encoder:Distance Per Pulse | Specifies the distance to measure for each pulse the encoder generates on signal A or signal B. This value is in the units you specify with CI.LinEncoder.Units. Details |
| Counter Input:Position:Linear Encoder:Initial Position | Specifies the position of the encoder when the measurement begins. This value is in the units you specify with CI.LinEncoder.Units. Details |
| Counter Input:Position:Decoding Type | Specifies how to count and interpret the pulses the encoder generates on signal A and signal B. X1, X2, and X4 are valid for quadrature encoders only. Two Pulse Counting is valid for two-pulse encoders only. Details |
| Counter Input:Position:A Input:Terminal | Specifies the terminal to which signal A is connected. Details |
| Counter Input:Position:A Input:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Position:A Input:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Position:A Input:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Position:A Input:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Position:A Input:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Position:B Input:Terminal | Specifies the terminal to which signal B is connected. Details |
| Counter Input:Position:B Input:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Position:B Input:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Position:B Input:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Position:B Input:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Position:B Input:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Position:Z Input:Terminal | Specifies the terminal to which signal Z is connected. Details |
| Counter Input:Position:Z Input:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Position:Z Input:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Position:Z Input:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Position:Z Input:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Position:Z Input:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Position:Z Index Enable | Specifies whether to use Z indexing for the channel. Details |
| Counter Input:Position:Z Index Value | Specifies the value to which to reset the measurement when signal Z is high and signal A and signal B are at the states you specify with CI.Encoder.ZIndexPhase. Specify this value in the units of the measurement. Details |
| Counter Input:Position:Z Index Phase | Specifies the states at which signal A and signal B must be while signal Z is high for NI-DAQmx to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than A High B High. Details |
| Counter Input:Pulse Width:Units | Specifies the units to use to return pulse width measurements. Details |
| Counter Input:Pulse Width:Input Terminal | Specifies the input terminal of the signal to measure. Details |
| Counter Input:Pulse Width:Starting Edge | Specifies on which edge of the input signal to begin each pulse width measurement. Details |
| Counter Input:Pulse Width:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Pulse Width:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Pulse Width:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Pulse Width:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Pulse Width:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Two Edge Separation:Units | Specifies the units to use to return two-edge separation measurements from the channel. Details |
| Counter Input:Two Edge Separation:First:Input Terminal | Specifies the source terminal of the digital signal that starts each measurement. Details |
| Counter Input:Two Edge Separation:First:Edge | Specifies on which edge of the first signal to start each measurement. Details |
| Counter Input:Two Edge Separation:First:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Two Edge Separation:First:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Two Edge Separation:First:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Two Edge Separation:First:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Two Edge Separation:First:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Two Edge Separation:Second:Input Terminal | Specifies the source terminal of the digital signal that stops each measurement. Details |
| Counter Input:Two Edge Separation:Second:Edge | Specifies on which edge of the second signal to stop each measurement. Details |
| Counter Input:Two Edge Separation:Second:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Two Edge Separation:Second:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Two Edge Separation:Second:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Two Edge Separation:Second:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Two Edge Separation:Second:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Semi-Period:Units | Specifies the units to use to return semi-period measurements. Details |
| Counter Input:Semi-Period:Input Terminal | Specifies the input terminal of the signal to measure. Details |
| Counter Input:Semi-Period:Starting Edge | Specifies on which edge of the input signal to begin semi-period measurement. Semi-period measurements alternate between high time and low time, starting on this edge. Details |
| Counter Input:Semi-Period:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:Semi-Period:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:Semi-Period:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:Semi-Period:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:Semi-Period:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:Timestamp:Units | Specifies the units to use to return timestamp measurements. Details |
| Counter Input:Timestamp:Initial Seconds | Specifies the number of seconds that elapsed since the beginning of the current year. This value is ignored if CI.GPS.SyncMethod is IRIG-B. Details |
| Counter Input:Timestamp:GPS:Synchronization Method | Specifies the method to use to synchronize the counter to a GPS receiver. Details |
| Counter Input:Timestamp:GPS:Synchronization Source | Specifies the terminal to which the GPS synchronization signal is connected. Details |
| Counter Input:General Properties:Counter Timebase:Source | Specifies the terminal of the timebase to use for the counter. Details |
| Counter Input:General Properties:Counter Timebase:Rate | Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to take measurements in terms of time or frequency rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can take measurements only in terms of ticks of the timebase. Details |
| Counter Input:General Properties:Counter Timebase:Active Edge | Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Details |
| Counter Input:General Properties:Counter Timebase:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Input:General Properties:Counter Timebase:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Input:General Properties:Counter Timebase:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Input:General Properties:Counter Timebase:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Input:General Properties:Counter Timebase:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Input:General Properties:More:Count | Indicates the current value of the count register. Details |
| Counter Input:General Properties:More:Output State | Indicates the current state of the out terminal of the counter. Details |
| Counter Input:General Properties:More:Terminal Count Reached | Indicates whether the counter rolled over. When you query this property, NI-DAQmx resets it to FALSE. Details |
| Counter Input:General Properties:More:Counter Timebase Master Timebase Divisor | Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to measure slower signals without causing the count register to roll over. Details |
| Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Data Transfer Mechanism | Specifies the data transfer mode for the channel. Details |
| Counter Input:General Properties:More:Advanced:Data Transfer and Memory:Number Of Possibly Invalid Samples | Indicates the number of samples that the device might have overwritten before it could transfer them to the buffer. Details |
| Counter Input:General Properties:More:Advanced:Duplicate Count Prevention | Specifies whether to enable duplicate count prevention for the channel. Duplicate count prevention is enabled by default. Setting CI.Prescaler disables duplicate count prevention unless you explicitly enable it. Details |
| Counter Input:General Properties:More:Advanced:Prescaler | Specifies the divisor to apply to the signal you connect to the counter source terminal. Scaled data that you read takes this setting into account. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Setting this value disables duplicate count prevention unless you explicitly set CI.DupCountPrevention to TRUE. Details |
| Counter Output:Output Type | Indicates how to define pulses generated on the channel. Details |
| Counter Output:Pulse:Idle State | Specifies the resting state of the output terminal. Details |
| Counter Output:Pulse:Output Terminal | Specifies on which terminal to generate pulses. Details |
| Counter Output:Pulse:Time:Units | Specifies the units in which to define high and low pulse time. Details |
| Counter Output:Pulse:Time:High Time | Specifies the amount of time that the pulse is at a high voltage. This value is in the units you specify with CO.Pulse.Time.Units or when you create the channel. Details |
| Counter Output:Pulse:Time:Low Time | Specifies the amount of time that the pulse is at a low voltage. This value is in the units you specify with CO.Pulse.Time.Units or when you create the channel. Details |
| Counter Output:Pulse:Time:Initial Delay | Specifies in seconds the amount of time to wait before generating the first pulse. Details |
| Counter Output:Pulse:Frequency:Duty Cycle | Specifies the duty cycle of the pulses. The duty cycle of a signal is the width of the pulse divided by period. NI-DAQmx uses this ratio and the pulse frequency to determine the width of the pulses and the delay between pulses. Details |
| Counter Output:Pulse:Frequency:Units | Specifies the units in which to define pulse frequency. Details |
| Counter Output:Pulse:Frequency:Frequency | Specifies the frequency of the pulses to generate. This value is in the units you specify with CO.Pulse.Freq.Units or when you create the channel. Details |
| Counter Output:Pulse:Frequency:Initial Delay | Specifies in seconds the amount of time to wait before generating the first pulse. Details |
| Counter Output:Pulse:Ticks:High Ticks | Specifies the number of ticks the pulse is high. Details |
| Counter Output:Pulse:Ticks:Low Ticks | Specifies the number of ticks the pulse is low. Details |
| Counter Output:Pulse:Ticks:Initial Delay | Specifies the number of ticks to wait before generating the first pulse. Details |
| Counter Output:General Properties:Counter Timebase:Source | Specifies the terminal of the timebase to use for the counter. Typically, NI-DAQmx uses one of the internal counter timebases when generating pulses. Use this property to specify an external timebase and produce custom pulse widths that are not possible using the internal timebases. Details |
| Counter Output:General Properties:Counter Timebase:Rate | Specifies in Hertz the frequency of the counter timebase. Specifying the rate of a counter timebase allows you to define output pulses in seconds rather than in ticks of the timebase. If you use an external timebase and do not specify the rate, you can define output pulses only in ticks of the timebase. Details |
| Counter Output:General Properties:Counter Timebase:Active Edge | Specifies whether a timebase cycle is from rising edge to rising edge or from falling edge to falling edge. Details |
| Counter Output:General Properties:Counter Timebase:Digital Filter:Enable | Specifies whether to apply the pulse width filter to the signal. Details |
| Counter Output:General Properties:Counter Timebase:Digital Filter:Minimum Pulse Width | Specifies in seconds the minimum pulse width the filter recognizes. Details |
| Counter Output:General Properties:Counter Timebase:Digital Filter:Timebase:Source | Specifies the input terminal of the signal to use as the timebase of the pulse width filter. Details |
| Counter Output:General Properties:Counter Timebase:Digital Filter:Timebase:Rate | Specifies in hertz the rate of the pulse width filter timebase. NI-DAQmx uses this value to compute settings for the filter. Details |
| Counter Output:General Properties:Counter Timebase:Digital Synchronization:Enable | Specifies whether to synchronize recognition of transitions in the signal to the internal timebase of the device. Details |
| Counter Output:General Properties:More:Count | Indicates the current value of the count register. Details |
| Counter Output:General Properties:More:Output State | Indicates the current state of the output terminal of the counter. Details |
| Counter Output:General Properties:More:Auto Increment Count | Specifies a number of timebase ticks by which to increment each successive pulse. Details |
| Counter Output:General Properties:More:Counter Timebase Master Timebase Divisor | Specifies the divisor for an external counter timebase. You can divide the counter timebase in order to generate slower signals without causing the count register to roll over. Details |
| Counter Output:General Properties:More:Pulse Done | Indicates if the task completed pulse generation. Use this value for retriggerable pulse generation when you need to determine if the device generated the current pulse. When you query this property, NI-DAQmx resets it to FALSE. Details |
| Counter Output:General Properties:More:Advanced:Constrained Generation Mode | Specifies constraints to apply when the counter generates pulses. Constraining the counter reduces the device resources required for counter operation. Constraining the counter can also allow additional analog or counter tasks on the device to run concurrently. For continuous counter tasks, NI-DAQmx consumes no device resources when the counter is constrained. For finite counter tasks, resource use increases with the frequency regardless of the constraint mode. However, fixed frequency constraints significantly reduce resource usage, and fixed duty cycle constraint marginally reduces it. Details |
| Counter Output:General Properties:More:Advanced:Prescaler | Specifies the divisor to apply to the signal you connect to the counter source terminal. Pulse generations defined by frequency or time take this setting into account, but pulse generations defined by ticks do not. You should use a prescaler only when you connect an external signal to the counter source terminal and when that signal has a higher frequency than the fastest onboard timebase. Details |
| Counter Output:General Properties:More:Advanced:Ready For New Value | Indicates whether the counter is ready for new continuous pulse train values. Details |
| General Properties:Channel Type | Indicates the type of the virtual channel. Details |
| General Properties:Physical Channel Name | Specifies the name of the physical channel upon which this virtual channel is based. Details |
| General Properties:Description | Specifies a user-defined description for the channel. Details |
| General Properties:Is Global | Indicates whether the channel is a global channel. Details |