6. Assume that a radio receiver uses an IF strip consisting of three identical
gain of the IF strip is
7. The selection of an intermediate frequency in a receiver is a compromise
between conflicting characteristics.
Compared with the high intermediate
frequencies, a characteristic of the lower IF's is
a. low gain.
b. poor selectivity.
8. The selectivity of a receiver should be high to override noise and overcome
The selectivity in the IF stages of a
superheterodyne receiver can be increased by
a. inserting loading resistors.
b. stagger-tuning the IF stages.
c. providing a regenerative circuit.
d. using a galena crystal in a balanced bridge circuit.
9. Assume that an interfering signal is approximately 1,000 Hz from the desired
signal frequency passing through the IF amplifier in A of figure 188 (TM 11-665).
The interfering signal can be effectively rejected by adjusting capacitor
detector is preferred over other types of detectors in AM receivers because the
a. output waveform is a mirror image of the input waveform.
b. diode can handle high-level signals with less distortion than other types
c. diode detector has no gain and therefore does not magnify the amplitude of
d. curved characteristic of a diode provides the most efficient operating
condition for detection.