1 DYNATECH CORPORATION EXHIBIT 11 COMPUTATION OF PER SHARE EARNINGS --------------------------------- Historical Weighted Average Shares ---------- For the year ended March 31, 1995: Weighted average common stock outstanding, net of treasury stock 17,846,000 ========== For the year ended March 31, 1996: Common stock outstanding, net of treasury stock, beginning of year 17,572,000 Weighted average treasury stock issued during the year 461,000 Weighted average common stock equivalents 351,000 Weighted average treasury stock repurchased (69,000) ---------- Weighted average common stock outstanding, net of treasury stock 18,315,000 ========== For the year ended March 31, 1997: Common stock outstanding, net of treasury stock, beginning of year 17,584,000 Weighted average treasury stock issued during the year 144,000 Weighted average common stock equivalents 838,000 Weighted average treasury stock repurchased (538,000) ---------- Weighted average common stock outstanding, net of treasury stock 18,028,000 ==========