19. In relation to the RF input signals to the two mixer stages in the receiver
shown in figure 4-4, the first and second local oscillators operate at frequencies
a. above the RF inputs.
b. below the RF inputs.
c. above and below the RF inputs, respectively.
d. below and above the RF inputs, respectively.
20. The squelch voltage in the receiver shown in figure 4-4 is deactivated either
when the volume control is off or when
a. R8 is adjusted.
b. the volume control is maximum.
c. diode CR6 develops an output voltage.
d. limiting stage Q10 reduces the amplitude of the input.
CHECK YOUR ANSWERS WITH LESSON 4 SOLUTION SHEET PAGES 59 AND 60.
HOLD ALL TEXTS AND MATERIALS FOR USE WITH EXAMINATION.