B- Give a brief answer for the following questions 1. A temperature measurement within a range of (-20° to 20° ) with accuracy of 0.25° the readings are taken every (0.5 Sec), then converted to binary PCM. What is the bit rate required? 2. Five signals have the same BW = 10 KHz to be FDMed. What is the FDM bandwidth? 3. Why does a broadcast radio station need only one transmitter, but mobile telephony requires many?
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- The information in an analog signal voltage waveform is to be transmitted over a PCM system with an accuracy of : 0.1 % of the peak-to-peak analog signal. The analog voltage waveform has a bandwidth of 43 Hz and an amplitude range of - 10 to 10 Vots. Determine the minimum bit rate fin bps) required in the PCM system? O a 688 O 774 O c 387 O d 86 Oe 258A 450 kHz carrier signal is modulated with a 15 kHz modulating signal. What are its sideband frequencies?1. With the help of Octave program perform the Modulation and Demodulation (AM) of information signal with carrier signal, through subplots with following signals a. Modulating signal b. Modulated signal c. Demodulated signal
- transistor datasheet. 1. COMPLETE TABLE #1 Table 1 Parameters of BJT transistors Code type Ic [A] VCEO [V] PD[w] ft[MHz] encapsulated 2N2222A 2N3904 2N3906 NPN 0.2A 40V 0.625W 300MHz TO-92 MPS2907A PNP 0.8A 60V 0.4W 200MHz TO-92Choose the correct answer low HDOP (Horizontal Dilution of Precision) number such as2 indicates a ........................... a.poor fix b.good fix c.poor signal quality d. good signal qualityFor a FM system, the maximum freq deviation is 75 kHz and the maximum freq of the info. signal is 10 kHz. What will be the total bandwidth of the FM system? What will be the modulation index?
- Calculate the offset for the physical address 00062 H and segment address FFFFH,4. What parameter of a PPM signal varies in direct proportion to the message signal amplitude? a. the average frequency of the PPM pulses b. the distance between the PPM pulses c. the amplitude of the PPM pulses d. the width of the PPM pulses 5. What is the function of the prefilter in a PTM modulation circuit? completely removes frequencies greater than 8 kHz a. completely removes the PTM signal's first replica b. frequencies c. filters the message signal d. partially reconstructs and amplifies the message signal 6. What advantage does a PPM signal have over a PWM signal? a. can be used for message signals greater than 5 kHz b. requires lower sampling frequency c. easier to demodulate d. requires less transmission power 7. Why does PTM require a higher sampling frequency than PAM? a. The amplitude of PTM signals is constant. b. There are more sidebands in the first replica of a PTM c. Signal than in a PAM signal. d. A sample/hold circuit requires a higher sampling frequency. e. There…Q2/ The information in an analog signal voltage waveform is to be transmitted over a PCM system with an accuracy of ±0.1% (full scale). The analog voltage waveform has a bandwidth of 100 Hz and an amplitude range of -10 to +10 volts. Find the minimum sampling rate required. i) ii) Find minimum bit rate required in the PCM signal. Find the number of bits in each PCM word. iii) iv) Find the minimum absolute channel bandwidth required for the transmission of the PCM signal.
- 4. The information in an analog voltage waveform is to be transmitted over a PCM system with a F 0.2% accuracy (full scale). The analog waveform has a bandwidth of 200 Hz, and an amplitude range of -5 to +5 V. determine the following: - The minimum sampling rate needed. - The number of bits needed in each PCM word. - The minimum bit rate in the PCM signal. - The minimum channel bandwidth for transmission of this PCM signal.1o11 An analog signal with a bandwidth of 4.2kHz is to be converted into binary PCM and transmitted over a channel. The peak signal to quantization ratio at the receiver output must be at least 45dB. What will be the output bit rate?Question 3 3. A communication system transmits an analog waveform via a Yagi antenna of length 3m. The analog wave form is carrier modulated and transmitted over a Maray PAM system, where the number of pulse level is M = 64. The quantization distortion must not exceed ± 2% of the peak-to-peak analog signal. i What is the maximum number of bits per sample that should be used in this PCM? ii. What is the minimum sampling rate? iii. Determine the maximum frequency iv. What’s the resulting bit transmission rate? v. Compute the sampling time