hp3561_read_marker (ul_scopes)

	status.i4.v = hp3561_read_marker(dev_address.i4.v, x_value.r4.r, 
					y_value.r4.r)

	Reads the current HP3561 marker postions and returns the x and y values


	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.
	x_value		analyzers returned x value
	y_value		analyzers returned y value

	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