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converts digital data to analog signal so that it 9 A can be transmitted over an analog line 10. List three techn iques of digital-to-digital conversion. Ie digital signaling elements all have the same algebraic sign, all positive or 11. all negative, then the signal is 12. The device used for converting analog data into digital form for transmission and subsequently recovering the original analog data from the digital, is a 13. In signaling one logic state is represented by a positive voltage level and the other by a negative voltage level. 14. The rate in bits per second at which data can be communicated is the 15. In the scheme, a binary 0 is represented by no line signal and a binary 1 is represented by a positive or negative pulse. The binary 1 pulses must alternate in polarity. 16. A reduction in strength is called