The use of second order Markov chains to model digital symbol synchroniser performance

Process for activating a getter composed of a porous barium pellet comprising maintaining a barium pellet in an inert atmosphere, placing the pellet in an enclosed chamber, evacuating the chamber and heating the evacuated chamber containing the pellet to about 800 DEG F for about two hours to activate same by removing gases from the surfaces of the pellet and an activated barium getter comprising a perforated metal or alloy can preferably composed of tantalum containing a barium pellet which has been heated in a vacuum to about 800 DEG F for about two hours.

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