| Write/Read | About DC Sources | 
| Description | Sets and returns start DC value for the specified DC source. | 
| VB Syntax | dc.Start(name,port) = value | 
| Variable | (Type) - Description | 
| dc | An DCStimulus (object) | 
| name,port | (String) Name of the "DC source, port" Use Source Property to read a list of configured DC source names. To set the DC source to be always ON, do NOT specify a port. | 
| value | (Double) DC Start value. Choose a value within the range of the DC source. | 
| Return Type | Double | 
| Default | .5 | 
| Examples | 'Set AO1 to always ON dc.Start "AO1", 3 'Read Start for MyDCSource,Port 1 dc.Start? "MyDCSource,Port 1" | 
| C++ Syntax | HRESULT get_Start(BSTR name, VARIANT_BOOL * pValue); HRESULT put_Start(BSTR name, VARIANT_BOOL newValue); | 
| Interface | IDCStimulus |