is to assign one voltage level to binary- 24) The simplest form of digital encoding of one and another to binary-zero B) carrier data A) digital data C) AM data D) analog data 25) A analog line. converts digital data to analog signal so that it can be transmitted over an A) modem B) satellite C) router D) receiver 27) If digital signaling elements all have the same algebraic sign, all positive or al then the signal is A) polar B) unipolar C) baseband D) differential 28) Defined as the power output in a particular direction compared to that produced in any direction by a perfect omnidirectional antenna, is a measure of the directionalityo the antenna. A) effective area B) antenna gain C) parabola D) antenna wavelength 29) Correction of errors using an error detecting code requires that block of data to be A) skipped over C) retransmitted B) deleted D) streamed 30) The use of coding allows a reduction, referred to as theand defined as the reduction in decibels to achieve a specified BER of an error correcting coded system compared to an uncoded system using the same modulation. A) code rate B) fixed coding C) coding gain D) block code