hp35665a_get_plot_limits (ul_scopes)

	status.i4.v = hp35665a_get_plot_limits(dev_address.i4.v,channel.i4.v,
				v_max.r4.r,v_min.r4.r, x_max.r4.r, x_min.r4.r) 

	Returns  x and y min and max values to trace data for a channel of an 
		 HP 35665A  spectrum Analyzer.  These values cooridate to 
		 to the start and stop frequency for X.  A previous call to 
		 hp35665A_get_waveform() will return the trace data.

	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.
       channel		scope channel to request data for: 
			HP_CHAN1 -> Channel 1
			HP_CHAN2 -> Channel 2
	v_max		returns vertical maximum value from the scope
	v_min		returns vertical minimum value from the scope
	x_max		returns horizontal maximum value from the scope
	x_min		returns horizontal minimum value from the scope
	cnt_frq		returns center frequency of the spectrum analyzer
	ave		returns the number of averages of the spectrum analyzer


	This function returns ACNET status values as follows:

	CBS_OK			success
	otherwise		GAS error

	This function requires the following include files:

	ul_scopes_h:hpdefs_h

	Related functions:

	hp35665a_get_plot_limits, hp35665_get_waveform