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Electronics and Communication Wireless Communication Difficulty: Medium

'W'h'i'c'h' 'o'f' 't'h'e' 'f'o'l'l'o'w'i'n'g' 'i's' 'n'o't' 'a's's'o'c'i'a't'e'd' 'w'i't'h' 'a' 'p'-'n' 'j'u'n'c't'i'o'n' The bit stream 01001 is differentially encoded using 'Delay and Ex-OR' scheme for DPSK transmission. Assuming the reference bit as a '1' and assigning phases of '0' and 'π' for 1's and 0's respectively, in the encoded sequence, the transmitted phase sequence becomes The principle of operation of Q-meter is based on The transfer function of a second order low pass filter shown in Figure is Two ceramic capacitors have the following parameters. One has capacitance C 1 and ceramic thickness d 1 . The other has capacitance C 2 and ceramic thickness d 2 . When the two are connected in series, the combination has a capacitance of: