Related Questions

The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to
A Reduce the spurious frequency problem
B Increase the frequency stability of the synthesizer
C Reduce the number of decades
D Reduce the number of crystals required
What frequency range is the high frequency band?
A 3 kHz
B 3 to 30 MHz
C 30 to 300 MHz
D 10 GHz
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency
A To help the image frequency rejection
B To permit easier tracking
C Because otherwise an intermediate frequency could not be produced
D To allow adequate frequency coverage without switching
In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________
A The difference frequency is closer to oscillator frequency
B Lower frequencies are easier to amplify
C Only the difference frequency can be modulated
D None of the above
A band-limited signal with a maximum frequency of 5 kHz is to be sampled. According to the sampling theorem, the sampling frequency which is not valid is
A 5 kHz
B 12 kHz
C 15 kHz
D 20 kHz
In case of frequency modulation, modulating voltage remains constant if the modulating frequency is lowered, then
A Amplitude of distant sidebands decreases
B Amplitude of distant sidebands increases
C Amplitude of distant sidebands remains constant
D Amplitude of distant sidebands first increases, then decreases
In Bode plots the frequency at which two asymptotes meet is called corner frequency.
A True
B False
What is the local oscillator (mixer) frequency of the satellite with an uplink frequency in GHz band?
A 3500 MHz
B 4500 MHz
C 2225 MHz
D 2555 MHz
To measure radio frequency, the suitable frequency meter is
A Weston frequency meter
B reed vibrator frequency meter
C heterodoxy frequency meter
D electrical resonance frequency meter
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
A VR > VC
B VC > VR
C VR = VC
D VR and VC = 0

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