3-F-045: IF Amplifiers
3-45F1:
What degree of selectivity is desirable in the IF circuitry of a wideband FM phone receiver?
15 kHz.
1 kHz.
2.4 kHz.
4.2 kHz.
3-45F2:
Which one of these filters can be used in micro-miniature electronic circuits?
Receiver SAW IF filter.
High power transmitter cavity.
Floppy disk controller.
Internet DSL to telephone line filter.
3-45F3:
A receiver selectivity of 2.4 kHz in the IF circuitry is optimum for what type of signals?
SSB voice.
CW.
Double-sideband AM voice.
FSK RTTY.
3-45F4:
A receiver selectivity of 10 KHz in the IF circuitry is optimum for what type of signals?
Double-sideband AM.
SSB voice.
CW.
FSK RTTY.
3-45F5:
What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?
Undesired signals will reach the audio stage.
Output-offset overshoot.
Thermal-noise distortion.
Filter ringing.
3-45F6:
How should the filter bandwidth of a receiver IF section compare with the bandwidth of a received signal?
Slightly greater than the received-signal bandwidth.
Approximately half the received-signal bandwidth.
Approximately two times the received-signal bandwidth.
Approximately four times the received-signal bandwidth.
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