FCC Exam Question: 6A5
What is the most common type of emission for shipboard VHF-DSC transceivers?
Explanation: Shipboard VHF-DSC transceivers are primarily used for two main functions: voice communication and Digital Selective Calling (DSC). While DSC uses a digital emission type (such as F1B or G1B for data), the most common, day-to-day emission type utilized by these transceivers is for analog voice communication. The emission designator G3E describes this: * **G:** Indicates Phase Modulation, which is a form of Frequency Modulation (FM). Marine VHF radios use FM for voice. * **3:** Denotes a single channel carrying analog information. * **E:** Specifies Telephony, meaning voice communication. Therefore, G3E represents the standard narrowband FM voice operation common on marine VHF radios. Options B (J3B) and D (H3E) signify Single Sideband (SSB) telephony, which is not used for voice on marine VHF. Option A (F1B) describes Frequency Shift Keying (FSK) digital telegraphy, which is used for DSC but is less common in overall transceiver usage than voice.
44F6
27C2
38E4
2A6
48G3
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Includes Elements 1, 3, 6, 7R, 8, and 9.