Across
- 3. signal that lies in two levels
- 9. Exchange of information
- 10. range of frequency from 300 MHz to 30 MHz
- 12. interference between two channel
- 13. used to receive information
- 14. transducer output are generally term as
Down
- 1. added in signal in channel
- 2. used to transmit the information
- 4. that convert one form of energy into another
- 5. a comparator that compare with zero reference value
- 6. Two input signal are compared
- 7. a type of communication where medium is not needed
- 8. one way communication
- 11. A terrestrial pneumatic channel
- 12. A medium of communication