Ham Amateur Radio Technician Practice Exam

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What is the maximum symbol rate allowed for RTTY or data emissions transmitted below 28 MHz?

150 baud
300 baud
600 baud
1200 baud

The correct answer is: 300 baud

The maximum symbol rate allowed for RTTY (Radio Teletype) or data emissions transmitted below 28 MHz is set at 300 baud. This restriction is established by the FCC (Federal Communications Commission) regulations, which aim to mitigate interference among various services that operate in the amateur radio bands. By limiting the symbol rate to 300 baud, it helps ensure that the emissions remain within a specific bandwidth, thereby reducing the likelihood of congestion and interference. This is important for maintaining effective communication and ensuring that all users of the band can operate without disrupting one another. In amateur radio, baud rate refers to the number of symbols transmitted per second, which directly correlates to the data transmission speed. The decision to limit this rate reflects the balance between the need for efficient communication and the need to maintain a fair use of the frequencies shared by many operators.