A signal is transmitted at 1 W from an antenna. Due to channel attenuation, the received signal power is 1 mW. Calculate the change in signal power in terms of decibels. (The answer should be one sentence saying "X" dB amount of decrease is observed.)
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- 1. Looking at the transmitter, the signal power is 23 mW. The input signal to noise ratio is 40 dB. The channel offers 3 dB attenuation, making the output power down to 11.5 mW, power to the signal and the output noise is three times the input noise level. Determine the Signal to noise ratio at the output.. Explain through equations what happen if there is a phase error θc between the transmitted ASK signal and local (replica) carrier signal in coherent ASK demodulator. Then what happen if θc=90It's simply the proportion of the actual frequency deviation to the maximum frequency deviation. Select your answer. Carrier swing Percent modulation Phase deviation Frequency deviation
- Amplitude modulation is: * Change in amplitude of the carrier according to modulating signal frequency Change in amplitude of the carrier according to modulating signal Change in frequency of the carrier according to modulating signal Change in amplitude of the modulating signal according to carrier signalExplain Larmor Frequency? Please answer at your own easy words. Answer should be to the point.The amplitude of the carrier signal is equal to: *
- Figure (1) shows the block diagram of a wideband frequency modulator using the indirect method. This modulator is used to transmit audio signals containing frequencies in the range of 100 Hz to 15 kHz. The narrowband is supplied with a carrier of frequency fl-0.1 MHz by crystal- controlled oscillator also ß-0.2, a second crystal- controlled oscillator supplied a sinusoidal wave of frequency 9.5 MHz to the mixer. The system Carrier frequency at the transmitter output, fc-100MHz Minimum frequency deviation, Af-75, find nl and n2? f(t) NBFM Freq. Multiplier 1 Oscillator1 Fig. (1) Mixer Oscillator2 Freq. Multiplier 2 frm(t) n1=72, n2=47 O n1=73, n2-48 O n1=75, n2=50 n1=77, n2=52 O n1=76, n2=51 OWhat major RF band does 108 MHz belong? Answer in acronym.FM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The carrier is a cosine signal with an amplitude of 10V and a frequency of 2000Hz. What is the power of the FM modulated signal?
- Problem1: the figure shows multiple modulation schemes for the signal that is given by the dashed line sinusoidal function, the X-axis is the time axis is seconds and the Y-axis is the amplitude. Answer the following: 1. What is the modulation scheme in A? 2. What is the modulation scheme in B? 3. What is the sampling frequency? 4. What is the value of the duty cycle in A?A 100MHZ carrier is frequency modulated by 10 KHz wave. For a frequency deviation of 50 KHz, calculate the modulation index of the FM signal. 100 70 90 50 Carson's rule is used to calculate Signal to noise ratio O Noise figure Bandwidth of FM signal Modulation indexFM modulator is used to transmit a cosine message signal with 4V amplitude and 20Hz frequency. The carrier is a cosine signal with an amplitude of 10V and a frequency of 2000Hz. What is the strength of the FM modulated signal?