Radio Receivers
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from

Instability
Gain variation over the frequency coverage range
Insufficient gain and sensitivity
Inadequate selectivity at high frequencies

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Radio Receivers
In a ratio detector

the linearity is worse than in phase discriminator
the output is twice that obtainable from a similar phase discriminator
the circuit is the same as in a discriminator, except that the diodes are reversed
stabilization against signal strength variations is provided

ANSWER DOWNLOAD EXAMIANS APP