niDMM_ConfigureFrequencyVoltageRange
ViStatus = niDMM_ConfigureFrequencyVoltageRange(ViSession Instrument_Handle, ViReal64 Voltage_Range)
Purpose
For the NI 4070/4071/4072 only, specifies the expected maximum amplitude of the input signal for frequency and period measurements.
Parameters
| Input |
| Name |
Type |
Description |
| Instrument_Handle |
ViSession |
Identifies a particular instrument session. You obtain the Instrument_Handle parameter from niDMM_init or niDMM_InitWithOptions. The default is None.
|
| Voltage_Range |
ViReal64 |
Sets the expected maximum amplitude of the input signal. Refer to the
NI 4070,
NI 4071, and
NI 4072 sections for a list of valid values. NI-DMM sets
NIDMM_ATTR_FREQ_VOLTAGE_RANGE to this value. The minimum peak-to-peak signal amplitude that can be detected is 10% of the specified Voltage_Range.
| Name | Value | Description |
|---|
| NIDMM_VAL_AUTO_RANGE_ON (default) |
-1.0 |
Configures the DMM to take an Auto Range measurement to calculate the voltage range before each frequency or period measurement. |
| NIDMM_VAL_AUTO_RANGE_OFF |
-2.0 |
Disables Auto Ranging. The driver sets the voltage range to the last calculated voltage range. |
|
Return Value
| Name |
Type |
Description |
| Status |
ViStatus |
Reports the Status of this operation. To obtain a text description of the status code, call
niDMM_error_message. To obtain additional information concerning the error condition, use
niDMM_GetError. |