ECE :: Communication Systems
-
If D is mouth diameter of a paraboloid reflector, its directivity is proportional to
-
A noiseless 3 kHz channel can't transmit binary bit at the rate
-
In an AM wave the carrier and one of the side bands is suppressed. If m = 1, the percentage saving in power is
-
Assertion (A): An electronic tuner uses varactor diode
Reason (R): The capacitance of a varactor diode depends on the magnitude of reverse bias.
-
A superheterodyne receiver is to operate in the frequency range 550 kHz - 1650 kHz, with the intermediate frequency of 450 kHz. Let
denote the required capacitance ratio of the local oscillator and I denote the image frequency (in kHz) of the incoming signal. If the receiver is tuned to 700 kHz, then -
In a tape recorder the output from RF oscillator is given to
-
A + 1.9 lens has a focal length of 25 mm. The diameter of lens is about
-
Which of the following terms are applicable to troposcatter propagation?
-
If the amplitude of the voltage is kept constant, but its frequency is raised to 6 kHz, the new deviation will be for the modulation index is, if fm = 500 Hz, Δf = 2.25
-
In TV scanning sequence of lines is
Whatsapp
Facebook
.
.
1600 kHz
.