Claims
- 1. A method of transmitting/receiving telemetry control signals with Intermediate Frequency (IF) payload data and DC signals on a common cable between an indoor unit (IDU) and outdoor unit (ODU) comprising the steps of:
modulating a carrier signal with the telemetry control signals to represent serial data bytes by switching ON and OFF a carrier tone for ON_OFF keying and forming a modulated signal; and bandpass filtering the modulated signal such that when transmitted on a common cable, the signal will not interfere with payload data and DC signals.
- 2. A method according to claim 1, and further comprising the step of multiplexing the modulated signal with payload data and DC signals onto the common cable.
- 3. A method according to claim 1, and further comprising the step of receiving and demodulating the modulated signal by detecting the carrier tone and converting the carrier tone into a logic-level signal that is decoded.
- 4. A method according to claim 1, and further comprising the step of receiving and demodulating the modulated signal using a bandpass filter and envelope detector and inverter logic gate.
- 5. A method according to claim 4, and further comprising the step of demodulating with a bandpass filter that feeds a diode envelope detector followed by an inverter having an output that is passed to a universal asynchronous receiver/transmitter (UART).
- 6. A method according to claim 1, and further comprising the step of communicating full-duplex by assigning one of the ODU or IDU to transmit on a lower frequency and the other to transmit on a higher frequency.
- 7. A method according to claim 1, and further comprising the step of communicating half-duplex by designating master or slave devices for respective ODU or IDU.
- 8. A method according to claim 1, and further comprising the step of bandpass filtering and removing DC components and reducing high frequency harmonics that would interfere with other signals at multiplexing.
- 9. A method of transmitting/receiving telemetry control signals with Intermediate Frequency (IF) payload data and DC signals on a common cable between an indoor unit (IDU) and outdoor unit (ODU) comprising the steps of:
modulating a carrier signal with the telemetry control signals to represent serial data bytes by switching ON and OFF a carrier tone for ON_OFF keying and forming a modulated signal by combining the output of a universal asynchronous receiver/transmitter (UART) with a clock signal from a clock source at a desired carrier frequency; and bandpass filtering the modulated signal such that when transmitted on a common cable, the signal will not interfere with payload data and DC signals.
- 10. A method according to claim 9, and further comprising the step of combining the output of the UART with the clock signal using AND gate logic as a mixer that switches ON and OFF the carrier.
- 11. A method according to claim 9, and further comprising the step of bandpass filtering and removing DC components and reducing high frequency harmonics that would interfere with other signals at multiplexing.
- 12. A method according to claim 9, and further comprising the step of multiplexing the modulated signal with payload data and DC signals onto the common cable.
- 13. A method according to claim 9, and further comprising the step of receiving the and detecting the carrier tone and converting the into a logic-level signal that is decoded.
- 14. A method according to claim 9, and further comprising the step of demodulating the modulated signal using a bandpass filter and envelope detector and inverter logic gate.
- 15. A method according to claim 14, and further comprising the step of demodulating with a bandpass filter that feeds a diode envelope detector followed by an inverter having an output that is passed to a universal asynchronous receiver/transmitter.
- 16. A method according to claim 9, and further comprising the step of communicating full-duplex by assigning one of the ODU or IDU to transmit on a lower frequency and the other to transmit on a higher frequency.
- 17. A method according to claim 9, and further comprising the step of communicating half-duplex by designating master or slave devices for respective ODU or IDU.
- 18. A system of transmitting/receiving telemetry control signals with Intermediate Frequency (IF) payload data and DC signals on a common cable between an indoor unit (IDU) and outdoor unit (ODU) comprising:
a modulator for modulating a carrier signal with the telemetry control signals to represent serial data bytes by switching ON and OFF a carrier tone for ON_OFF keying and forming a modulated signal; and a bandpass filter for bandpass filtering the modulated signal such that when transmitted on a common cable, the signal will not interfere with payload data and DC signals.
- 19. A system according to claim 18, and further comprising a multiplexer for multiplexing the modulated signal with payload data and DC signals onto the common cable.
- 20. A system according to claim 18, and further comprising a receiver that receives the modulated signal and a demodulator that demodulates the modulated signal by detecting the carrier tone and converting the carrier tone into a logic-level signal that is decoded.
- 21. A system according to claim 18, and further comprising a receiver for receiving the signal and a demodulator for demodulating the modulated signal, said demodulator comprising a bandpass filter and envelope detector and inverter logic gate.
- 22. A system according to claim 21, and further comprising a diode envelope detector that receives a signal from the bandpass filter, followed by an inverter and a universal asynchronous receiver/transmitter that receives the signal from the diode envelope detector.
- 23. A system of transmitting/receiving telemetry control signals with Intermediate Frequency (IF) payload data and DC signals on a common cable between an indoor unit (IDU) and outdoor unit (ODU) comprising:
a modulator for modulating a carrier signal with the telemetry control signals to represent serial data bytes by switching ON and OFF a carrier tone for ON_OFF keying and forming a modulated signal, said modulator comprising a universal asynchronous receiver/transmitter (UART) and clock source with a clock signal such that the output of the UART is combined with the clock signal at a desired carrier frequency; and a bandpass filter for bandpass filtering the modulated signal such that when transmitted on a common cable, the signal will not interfere with payload data and DC signals.
- 24. A system according to claim 23, and further comprising an AND gate logic circuit that combines the output of the UART with the clock signal as a mixer that switches ON and OFF the carrier.
- 25. A system according to claim 23, and further comprising a multiplexer for multiplexing the modulated signal with payload data and DC signals onto the common cable.
- 26. A system according to claim 23, and further comprising a receiver for receiving the modulated signal and a demodulator that detects the carrier tone and converts the signal into a logic-level signal that is decoded.
- 27. A system according to claim 23, and further comprising a receiver for receiving the modulated signal and a bandpass filter and envelope detector and inverter logic gate for demodulating the modulated signal.
- 28. A system according to claim 27, and further comprising a bandpass filter and a diode envelope detector. an inverter, and a UART that receives the signal.
RELATED APPLICATION
[0001] This application is based upon prior filed copending provisional application Serial No. 60/347,332 filed Jan. 10, 2002.
Provisional Applications (1)
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Number |
Date |
Country |
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60347332 |
Jan 2002 |
US |