Ham Radio Extra Class Practice Test

The option that provides the fastest data throughput under clear communication conditions is 300 baud packet. Packet radio at 300 baud can transmit data at approximately 300 bits per second. This high throughput capability makes it suitable for transferring larger amounts of data efficiently when the communication path is clear and has minimal interference. Other modes mentioned struggle with bandwidth efficiency. For example, AMTOR, though reliable for error correction in less-than-ideal conditions, typically operates at lower speeds than packet radio. The 170 Hz shift, 45 baud RTTY transmission type also operates at a significantly lower speed, providing only about 45 bits per second. PSK31 is designed for keyboard-to-keyboard real-time text communication at approximately 31.25 baud, which translates to a lower data throughput compared to packet radio. Thus, 300 baud packet stands out as the fastest option available among the choices presented.