hp54200_set_trigger (ul_scopes)

	status.i4.v = hp54200_set_trigger(dev_address.i4.v)

	This routine allows the user to set trigger commands to
	an HP54200 series scope.  The trigger commands that are
	settable are level, source and mode.  The routine provides
	a window that displays current settings and  allows new
	settings.

	dev_address	address of scope (a previous call to 'gpib_select'
			will have to be made to establish communication 
			to correct VME)

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid device address
	otherwise		other ACNET error

	This function requires the following include files:

	ul_scopes_h:hpdefs_h

	Related functions:

	hp54200_get_waveform, hp54200_set_acquire, hp54200_set_channel,
	hp54200_set_display,  hp54200_set_timebase, hp54200_set_waveform

	C/C++ usage:

	int	status;
	int	dev_address = DEV_ADDRESS;

	status = hp54200_set_trigger(dev_address);