AMBILOGIQUE LTD		GROUP3 TECHNOLOGY LTD

DTM-351G APPLICATION NOTES		2026-02-17

1.	NI-488 DRIVER

	In order to activate the GPIB-USB-HS adapter, you need to install the NI driver for it.
	The CD version is out of date, and will likely not work properly with Windows 11.
	The current driver is available at www.ni.com/en/support/downloads/drivers/download.ni-488-2.html#575749
	
	This download includes a current version of NI-MAX, which allows you to configure and self-test the adapter.
	

2.	STARTUP

	There are several problems with the system if it is not started up in the correct sequence.
	The NI GPIB-USB-HS adapter will lock up and refuse to address the DTMs.
	It is vital that the USB side of the adapter is powered before the GPIB side sees any instrument with power on.
	
	This is the correct sequence:
		1.	Power up the PC either with the USB adapter plugged in or not;
		2.	Plug in the USB connection, if not already plugged in;
		3.	Check that the READY LED on the GPIB-USB unit is lit;
		4.	Apply power to the DTM-351G.
		5.	Start the LabVIEW software.
		
		The system is then ready to run.
		
	Note that this applies to single DTM-151G applications also.

