dc

A) ASK B)PSK C)FSK D)DPSK
9) Companding results in [ ]
A) More S/N ratio at higher amplitudes B) More S/N ratio at lower amplitudes
C) Uniform S/N ratio throughout the signal D) Better S/N ratio at lower frequencies
10) Mean square quantization noise in the PCM system with step size of 2V is [ ]
A)1/3 B)1/12 C)3/2 D)2
Cont…..2
A
www.jntuworld.com www.jntuworld.com www.jwjobs.net JNTUWORLD
Code No: 07A5EC09 :2: Set No.1
II Fill in the blanks:
11) The minimum symbol rate of a PCM system transmitting an analog signal band limited to
2 KHz, the number of Q-levels 64 is ------------------
12) In DM granular noise occurs if when step size is -------------
13) The combination of compressor and expander is called---------------------
14) Data word length in DM is ---------------
15) Band width of PCM signals is -----------
16) A signal extending over-4V to +4Vis quantized in to 8e maximum possible quantization
error obtainable is-------------
17) Probability of error of PSK scheme is-----------------------
18) PSK and FSK have a constant--------------
19) Granular noise occurs when step size is--------------
20) Converting discrete time continuous signal into discrete amplitude discrete time signal is
called-----------------.
-oOowww.jntuworld.com
www.jntuworld.com www.jwjobs.net JNTUWORLD