フリー問題

問題文

Both LoRa and 802.15.4 spread the information they send, but they do it by different means. Which pair states what the LoRa method does to the carrier and what the 802.15.4 method applies to each chip interval?

選択肢

1. Both methods spread the same information, so the LoRa method shifts the carrier upward and the 802.15.4 method applies the chip clock in that specification.
2. Both methods spread the same information, so the LoRa method shifts the carrier upward and the 802.15.4 method applies the chip code in that specification.
3. Both methods spread the same information, so the LoRa method stretches the carrier upward and the 802.15.4 method applies the chip code in that specification.
4. Both methods spread the same information, so the LoRa method stretches the carrier upward and the 802.15.4 method applies the chip clock in that specification.