| Write/Read | About Periodic Counter | 
| Description | Set and read the ON/OFF state of a measurement trigger event based on the specified period set using the TriggerPeriodicCounterValue command. | 
| VB Syntax | sa.TriggerPeriodicCounterState = value | 
| Variable | (Type) - Description | 
| sa | A SpectrumAnalyzer (object) | 
| value | (Boolean) Choose from: 0 - OFF - Periodic counter OFF. 1 - ON - Periodic counter ON. | 
| Return Type | Boolean | 
| Default | 0 | 
| Examples | sa.TriggerPeriodicCounterState = OFF Write | 
| value = sa.TriggerPeriodicCounterState 'Read | |
| C++ Syntax | HRESULT put_TriggerPeriodicCounterState(VARIANT_BOOL bEnable); HRESULT get_TriggerPeriodicCounterState(VARIANT_BOOL* bEnable); | 
| Interface | ISpectrumAnalyzer |