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C > CARRIER NOISE LEVEL - Pg. 50

CARRIER NOISE LEVEL CARRIER NOISE LEVEL The noise level resulting from undes- ired variations of a carrier in the absence of any intended modula- tion. CARRIER SENSE In a local area network, an ongoing activity of a data station to detect whether another station is transmitting. CARRIER SYNCHRONIZATION In a radio receiver, the gener- ation of a reference carrier with a phase closely matching that of a received signal. CARRIER SYSTEM A multichannel telecommunications arrangement wherein a number of individual data and/or voice cir- cuits are multiplexed for transmission between nodes of a network with de-multiplexing occurring as required. CASE HARDENED Subjected to a surface heat-treating process that produces a highly stressed surface. CASE HARDENING Hardening a ferrous alloy so that the outer portion or case is made substantially harder than the inner portion or core.