Radio Receivers
One of the following cannot be used to demodulate SSB:

Diode Balance modulator
Bipolar transistor balanced modulator
Product detector
Complete phase-shift generator

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
In a broadcast superheterodyne receiver, the

Local oscillator frequency is normally double the IF
RF amplifier normally works at 455 kHz above the carrier frequency
Mixer input must be tuned to the signal frequency
Local oscillator operates below the signal frequency

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
Indicate the false statement in connection with communications receivers.

A product demodulator could be used for the reception of Morse code.
Variable sensitivity is used to eliminate selective fading
Double conversion is used to improve image rejection
The noise limiter cuts off the receiver’s output during a noise pulse.

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency

To help the image frequency rejection
Because otherwise an intermediate frequency could not be produced
To allow adequate frequency coverage without switching
To permit easier tracking

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of

Reducing the effect of negative-peak clipping
Improving the effectiveness of the AGC
Improving the selectivity of the receiver
Reducing the effect of noise at low modulation depths

ANSWER DOWNLOAD EXAMIANS APP