hp3561_read_values (ul_scopes)

	status.i4.v = hp3561_read_values(dev_address.i4.v, span.r4.r, 
					cen_freq.r4.r,num_avg.r4.r)

	Reads the HP3561 current values for the span, center frequency and 
	the number of averages.

	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.
	span		Returned span of the analyzer.
	cen_freq	Returned center frequency of the analyzer.
	num_avg		Returned number of averages of the analyzer.

	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