Q.1
Indicate the false statement in connection with communications receivers.
Q.2
One of the main functions of the RF amplifier in a superheterodyne receiver is to
Q.3
The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to
Q.4
The image frequency of a superheterodyne receiver
Q.5
An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive
Q.6
In a ratio detector
Q.7
The controlled oscillator synthesizer is sometimes preferred over the direct one because
Q.8
A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
Q.9
In a broadcast superheterodyne receiver, the
Q.10
Three-point tracking is achieved with
Q.11
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
Q.12
In a radio receiver with simple AGC
Q.13
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency
Q.14
Show which of the following statements about the amplitude limiter is untrue:
Q.15
To prevent overloading of the IF amplifier in a receiver, one should use
Q.16
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of
Q.17
A receiver has poor IF selectivity. It will therefore also have poor
Q.18
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from
Q.19
The typical squelch circuit cuts off
Q.20
When a receiver has good blocking performance, this means that
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