hp3561_source_on (ul_scopes)

	status.i4.v = hp3561_source_on(dev_address.i4.v, x_value.r4.r, 
					y_value.r4.r)

	Identifies the HP3561 instrument with a text string of make, model and
	version.


	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.
	on_off		This is a logical device that with the value of 
			TRUE will turn on the source as int as a type 
			(RAND or PERN) is defined.  A FALSE will turn off
			the source.
	type		This defines the type of noise possible for the 
			source.  It can either be random or periodic 
			noise (RAND or PERN).  A type must be specified
			to turn on the source.  (default = RAND).

	This function returns ACNET status values as follows:

	CBS_OK			success
	CBS_INVARG		invalid device address
	otherwise		GAS error

	This function requires the following include files:

	ul_scopes_h:hpdefs_h

	Related functions:

	hp3561_get_waveform, hp3561_init, hp3561_marker_to_peak, 
	hp3561_read_marker, hp3561_read_source_values, hp3561_read_values, 
	hp3561_set_source_atten, hp3561_source_on, hp3561_source_window