Technician 2022-2026T4B08
What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
B
Answer
Station setup and equipment operation
Type
A
Permits monitoring several modes at once by selecting a separate filter for each mode
B
Permits noise or interference reduction by selecting a bandwidth matching the mode
C
Increases the number of frequencies that can be stored in memory
D
Increases the amount of offset between receive and transmit frequencies
Answer Notes
Different modes of transmission occupy different amounts of bandwidth. For example, CW (Morse code) requires a very narrow bandwidth (around 500 Hz), while Single Sideband (SSB) requires about 2400 Hz, and AM or FM require even more.
By matching the receiver's bandwidth filter to the exact width of the incoming signal, you block out adjacent noise and interfering signals. If you used a wide filter for a narrow signal, you would hear a lot of unnecessary static and nearby stations, which makes the correct filter selection crucial for clear reception.
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What does a DMR “code plug” contain?
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How is a specific group of stations selected on a digital voice transceiver?