Subsequent Events	9 Months Ended
Sep. 29, 2013
Subsequent Events	R. Subsequent Events On October 25, 2013, Teradyne completed its acquisition of ZTEC Instruments, Inc. (“ZTEC”) located in Albuquerque, New Mexico. The acquisition was completed by acquiring all of the common and preferred stock of ZTEC for approximately $15 million and up to $5 million payable upon achievement of certain performance targets through December 31, 2015. The fair value of assets and liabilities acquired has not been disclosed because Teradyne has not completed the valuation. ZTEC is a supplier of modular wireless test instruments. The acquisition of ZTEC expands Teradyne’s wireless segment into the design verification test of wireless components and chipsets. On November 1, 2013, Teradyne sold its equity interest in Empirix Inc. and received proceeds of $34.2 million. An additional $5.2 million of proceeds will be held in escrow for 15 months, for potential indemnifications to the buyer. Teradyne will record a gain of $34.2 million in the fourth quarter of 2013.

Subsequent Events

9 Months Ended

Sep. 29, 2013

R. Subsequent Events

On October 25, 2013, Teradyne completed its acquisition of ZTEC Instruments, Inc. (“ZTEC”) located in Albuquerque, New Mexico. The acquisition was completed by acquiring all of the common and preferred stock of ZTEC for approximately $15 million and up to $5 million payable upon achievement of certain performance targets through December 31, 2015. The fair value of assets and liabilities acquired has not been disclosed because Teradyne has not completed the valuation. ZTEC is a supplier of modular wireless test instruments. The acquisition of ZTEC expands Teradyne’s wireless segment into the design verification test of wireless components and chipsets.

On November 1, 2013, Teradyne sold its equity interest in Empirix Inc. and received proceeds of $34.2 million. An additional $5.2 million of proceeds will be held in escrow for 15 months, for potential indemnifications to the buyer. Teradyne will record a gain of $34.2 million in the fourth quarter of 2013.