- Communication Systems - Section 1
- Communication Systems - Section 2
- Communication Systems - Section 3
- Communication Systems - Section 4
- Communication Systems - Section 5
- Communication Systems - Section 6
- Communication Systems - Section 7
- Communication Systems - Section 8
- Communication Systems - Section 9
- Communication Systems - Section 10
- Communication Systems - Section 11
- Communication Systems - Section 12
- Communication Systems - Section 13
- Communication Systems - Section 14
- Communication Systems - Section 15
- Communication Systems - Section 16
- Communication Systems - Section 17
- Communication Systems - Section 18
- Communication Systems - Section 19
- Communication Systems - Section 20
- Communication Systems - Section 21
- Communication Systems - Section 22
- Communication Systems - Section 23
- Communication Systems - Section 24
- Communication Systems - Section 25


Communication Systems - Engineering
Q1: The typical squelch circuitA
cuts off IF amplifier when AGC is minimum
B cuts off IF amplifier when AGC is maximum
C
cuts off audio amplifier when carrier is absent
D
eliminates RF interference when signal is weak
ANS:C - cuts off audio amplifier when carrier is absent To suppress noise when carrier is absent, squelch circuit cuts off audio amplifier. |


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