niFgen_ConfigureFreqList
ViStatus niFgen_ConfigureFreqList (ViSession vi, ViConstString channelName, ViInt32 frequencyListHandle, ViReal64 amplitude, ViReal64 dcOffset, ViReal64 startPhase);
Purpose
Configures the attributes of the signal generator that affect frequency list generation (the NIFGEN_ATTR_FREQ_LIST_HANDLE, NIFGEN_ATTR_FUNC_AMPLITUDE, NIFGEN_ATTR_FUNC_DC_OFFSET, and NIFGEN_ATTR_FUNC_START_PHASE attributes).
 |
Notes The signal generator must not be in the Generating state when you call this function. |
| You must call the niFgen_ConfigureOutputMode function to set the output mode to NIFGEN_VAL_OUTPUT_FREQ_LIST before calling this function. |
Parameters
| Input | ||||
| Name | Type | Description | ||
| vi | ViSession | Identifies your instrument session. vi is obtained from the niFgen_init or the niFgen_InitWithOptions functions and identifies a particular instrument session. | ||
| channelName | ViConstString | Specifies the channel name for which you want to configure the frequency list.
Default Value: "0" |
||
| frequencyListHandle | ViInt32 | Specifies the handle of the frequency list that you want the signal generator to produce. NI-FGEN sets the NIFGEN_ATTR_FREQ_LIST_HANDLE attribute to this value. You can create a frequency list using the niFgen_CreateFreqList function. The niFgen_CreateFreqList function returns a handle that you use to identify the list.
Default Value: None |
||
| amplitude | ViReal64 | Specifies the amplitude of the standard waveform that you want the signal generator to produce. This value is the amplitude at the output terminal. NI-FGEN sets the NIFGEN_ATTR_FUNC_AMPLITUDE attribute to this value.
For example, to produce a waveform ranging from –5.00 to +5.00 V, set the amplitude to 10.00 V.
Units: peak-to-peak voltage Default Value: None |
||
| dcOffset | ViReal64 | Specifies the DC offset of the standard waveform that you want the signal generator to produce. This value is the offset at the output terminal (the offset is from ground to the center of the waveform). NI-FGEN sets the NIFGEN_ATTR_FUNC_DC_OFFSET attribute to this value.
For example, to configure a waveform with an amplitude of 10.00 V to range from 0.00 to +10.00 V, set the DC Offset to 5.00 V. Units: volts Default Value: None |
||
| startPhase | ViReal64 | Specifies the horizontal offset of the standard waveform you want the signal generator to produce. Specify this attribute in degrees of one waveform cycle. NI-FGEN sets the NIFGEN_ATTR_FUNC_START_PHASE attribute to this value. A start phase of 180 degrees means output generation begins halfway through the waveform. A start phase of 360 degrees offsets the output by an entire waveform cycle, which is identical to a start phase of 0 degrees.
Units: degrees of one cycle Default Value: None degrees |
||
Return Value
| Name | Type | Description | ||||||||
| Status | ViStatus | Returns the status code of this operation. The status code either indicates success or describes an error or warning condition. You can examine the status code from each call to an NI-FGEN function to determine if an error occurred.
To obtain a text description of the status code, call the niFgen_error_message function. To obtain additional information about the error condition, call the niFgen_GetError function. To clear the error information from NI-FGEN, call the niFgen_ClearError function. The general meaning of the status code is as follows:
|