hp54500_set_channel (ul_scopes)

	status.i4.v = hp54500_set_channel(channel.i4.v, dev_address.i4.v)

	Allows user to view and change settings to an HP54504A scope
	channel settings.  The volts/div, channel offset, range and probe 
	settings are changable form these windows.

	channel		The scope channel that is needed:
			HP_CHAN1 -> channel 1
			HP_CHAN2 -> channel 2
			HP_CHAN3 -> channel 3 
			HP_CHAN4 -> channel 4

	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to correct VME.

	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:

	hp54500_change_dir, hp54500_display_wmem, hp54500_format_disk, 
	hp54500_get_disk_dir, hp54500_get_waveform, hp54500_init, 
	hp54500_load_from_disk, hp54500_message, hp54500_num_points,
	hp54500_set_acquire, hp54500_set_channel, hp54500_set_display,
	hp54500_set_root, hp54500_set_timebase, hp54500_set_trigger,
	hp54500_set_utilities, hp54500_set_waveform, hp54500_store_wmem,
	hp54500_write_to_disk, hp54500_num_screens, hp54500_del_disk_file.