AUSTIN, Texas--(BUSINESS WIRE)--NI (Nasdaq: NATI) today announced Q2 revenue of $302 million, down 3 percent year over year in U.S. dollar terms and up 3 percent year over year in constant currency terms. In Q2 2015, NI received $10 million in orders from its largest customer compared with $27 million in orders from this customer in Q2 2014. Excluding NI’s largest customer, the company’s total orders were down 1 percent for the quarter with orders under $20,000 down 2 percent year over year; or