Q.1 FSK is not affected by noise interference for which of the following reasons??
A) Noise is outside the bandwidth of an FSK signal
B) FSK doesn’t rely on the amplitude of the transmitted signal to carry intelligence
C) The wide bandwidth of an FSK signal prevents noise interference
D) None of these
Q.2 FSK is generated using which of the following methods?
A) By shifting the frequency of an oscillator at an RF rate
B) By shifting the frequency of an oscillator at an AF rate
C) By keying an AF oscillator at an RF rate
D) By keying an AF oscillator at an AF rate
Q.3 In the FSK signal, where is the intelligence contained?
A) In the duration of RF energy
B) In the frequency of RF energy
C) In the amplitude of RF energy
D) In the spacing between burst of RF energy
Q.4 The Tuneable LPF Low-pass Filter module is used to _______ and the DIODE and RC LPF form the ________ to complete the FSK signal’s demodulation?
A) Pick out one of the FSK signal's two sinewaves, envelope detector
B) Attenuates one of the FSK signal’s sinewaves, envelope detector
C) Obtain both the FSK’s signal’s sinewaves, envelope detector
D) Suppressed the low frequency side of carrier, envelope detector
