Across
- 2. Send a signal
- 5. a code invented that uses long and short signals. Originally for the telegraph.
- 8. Information that has been put into digital code.
- 9. uses digital code to maintain the sound quality of conversations over long distances.
Down
- 1. earliest form of long distance communication
- 3. is a type of receiver.
- 4. helps messages reach people quickly
- 6. object in space that transmit or sends signals to earth.
- 7. type of signal that can transmit over long distances.