NetScout Systems (NASDAQ:NTCT – Get Free Report) announced its quarterly earnings data on Thursday. Here are the key takeaways from NetScout Systems’ conference call:Get NetScout Systems alerts:First-quarter revenue rose 13% to $210.4 million , while non-GAAP EPS increased to $0.52 from $0.34; gross margin expanded to 80.6% and operating margin improved to 20.8%. NetScout Systems Trading Down 4.2%NTCT traded down $1.69 during trading hours on Friday, hitting $38.44. NetScout Systems has a 12 month low of $21.21 and a 12 month high of $45.28. Featured StoriesReceive News & Ratings for NetScout Systems Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for NetScout Systems and related companies with MarketBeat.com's FREE daily email newsletter.