Disabling Unused Extensions
IviPwrMeter Class Driver
When you call the IviPwrMeter_init, the IviPwrMeter_InitWithOptions, or the IviPwrMeter_Reset function, the class driver disables extension capability groups that the program does not use by setting attributes of the unused extension group to values that disable that extension group.
The class driver disables extension capability groups by setting the following attributes to the noted default values:
| Unused Extension Group | Invoked Attribute | Default Value Attribute Set to |
|---|---|---|
| IviPwrMeterChannelAcquistion | IVIPWRMETER_ATTR_CHANNEL_ENABLED | False |
| IviPwrMeterTriggerSource | IVIPWRMETER_ATTR_TRIGGER_SOURCE | Immediate |
| IviPwrMeterDutyCycleCorrection | IVIPWRMETER_ATTR_DUTY_CYCLE_CORRECTION_ENABLED | False |
| IviPwrMeterReferenceOscillator | IVIPWRMETER_ATTR_REF_OSCILLATOR_ENABLED | False |
 |
Note |
The following extension groups are not disabled by the IviPwrMeter driver: