EXHIBIT 12.1 PHASE METRICS, INC. STATEMENT REGARDING COMPUTATION OF RATIOS (IN THOUSANDS, EXCEPT RATIOS) RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS YEAR ENDED DECEMBER 31, --------------------------------------------------------------------- 1994 1995 1996 1997 1998 1999 ------ ------- -------- -------- -------- -------- Earnings: Income (loss) before income taxes and extraordinary items................................................ $ 943 $ 6,193 $(19,842) $ (9,812) $(66,506) $(47,202) Fixed charges: Interest expense.................................... 651 5,625 8,448 11,573 14,456 13,809 Rental expense interest factor(1)................... 60 178 1,133 1,700 1,600 1,133 ------ ------- -------- -------- -------- -------- Total fixed charges............................... 711 5,803 9,581 13,273 16,056 14,942 ------ ------- -------- -------- -------- -------- $1,654 $11,996 $(10,261) $ 3,461 $(50,450) $(32,260) ====== ======= ======== ======== ======== ======== Combined fixed charges and preferred stock dividend requirements........................................... $1,598 $10,390 $ 14,581 $ 18,145 $ 19,337 $ 18,664 ====== ======= ======== ======== ======== ======== Ratio of earnings (loss) to fixed charges(2)............ 1.0x 1.2x -- -- -- -- ====== ======= ======== ======== ======== ======== ________________________ (1) The portion of operating lease rental expense that is representative of the interest factor is deemed to be one-third of total operating lease rental expense. (2) For the years ended December 31, 1997, 1998 and 1999, earnings were inadequate to cover Fixed Charges by $12.7 million, $69.8 million, and $50.9 million respectively.