Multiple RF signal switching apparatus
View Patent ↗An RF multiple switching apparatus, such as one included in or coupled to a broadcast satellite signal receiver, having a plurality of multiple RF signal input ports for receiving respective ones of a plurality of RF signals, such as broadcast satellite television signals, utilizes a relative signal strength indicator, such as an automatic gain control signal, to determine the difference between the actual input signal that is present at one of the plurality of signal input ports and a false signal that appears to be present at another signal input port of the plurality of signal input ports due to the RF signal bleeding between the multiple signal input ports. During a setup configuration determination or routine, the switching apparatus steps through each RF signal input, extracts pertinent transmission network (such as a satellite transmission network) information, determines a relative signal strength indicator for the RF signal, and compares the obtained information. Setup data for each RF signal input is stored according to the comparison.
1. A method for determining RF signal input configuration comprising the steps of:
extracting first information from a first RF signal at a first port of a plurality of signal input ports;
determining a first indicator for said first RF signal;
extracting second information from a second RF signal at a second port of said plurality of signal input port;
determining a second indicator for said second RF signal;
comparing said first information with said second information; and
storing one of said first and second information if said first information is the same as said second information.
2. The method of claim 1 , wherein said step of determining a first indicator includes determining a first automatic gain control signal for said first RF signal; and
said step of determining a second indicator includes determining a second automatic gain control signal for said second RF signal.
3. The method of claim 1 , wherein the step of extracting said first information from said first RF signal at said first port of said pluraliiy of signal input ports includes extracting first network information; and
said step of extracting second information from said second RF signal at said second port of said plurality of signal input ports includes extracting second network information.
4. The method of claim 1 , further comprising the step of repeating said steps of extracting said information, determining said indicator, and comparing said indicator for each one of remaining ports of said plurality of signal input ports.
5. The method of claim 1 , wherein after each extraction step said method further comprises the steps of:
selecting a transponder;
attempting to acquire the selected transponder; and
repeating said selection of a transponder and attempting to acquire said selected transponder until said selected transponder is acquired.
6. An apparatus comprising:
a plurality of signal input ports for receiving a respective plurality of RF input signals;
a memory for storing program instructions; and
a signal processor coupled to said memory for processing said plurality of RF input signals in response to said program instructions, wherein said processor:
extracts first information from a first RF signal at a first port of said plurality of signal input ports,
determines a first indicator for said first RF signal;
extract second information from a second RF signal at a second port of said plurality of signal input ports,
determines a second indicator for said second RF signal,
compare said first information with said second information, and
stores one of said first and second information if said first information is the same as said second information.
7. The apparatus of claim 6 , wherein said program instructions are operative to further cause said processor to:
determine a first automatic gain control signal as said first indicator; and
determine a second automatic gain control signal as said second indicator.
8. The apparatus of claim 6 , wherein said program instructions are further operative to further cause said processor to:
extract first network information from said first RF signal as said first information; and
extract second network information from said second RF signal as said second information.
9. The apparatus of claim 6 , wherein said program instructions are further operative to cause said processor to repeat said steps of extracting said information, determining said indicator, and comparing said indicator for each one of the remaining ports of said plurality of signal input ports.
10. The apparatus of claim 6 , wherein said program instructions are further operative to cause said processor to:
select a transponder;
attempt to acquire the selected transponder; and
repeat said selection of a transponder and attempting to acquire said selected transponder until said selected transponder is acquired.
11. An apparatus comprising:
a plurality of signal input means for receiving a respective plurality of RF input signals;
memory means for storing program instructions; and
signal processing means coupled to said memory means for processing said plurality of RF input signals in response to said program instructions, wherein said signal processing means:
extracts first information from a first RF signal at a first input means of said plurality of signal input means,
determines a first indicator for said first RF signal;
extract second information from a second RF signal at a second input means of said plurality of signal input means,
determines a second indicator for said second RF signal.
compare said first information with said second information, and
stores one of said first and second information if said first information is the same as said second information.
12. The apparatus of claim 11 , wherein said program instructions are operative to further cause said signal processing means to:
determine a first automatic gain control signal as said first indicator; and
determine a second automatic gain control signal as said second indicator.
13. The apparatus of claim 11 , wherein said program instructions are further operative to further cause said signal processing means to:
extract first network information from said first RF signal as said first information; and
extract second network information from said second RF signal as said second information.
14. The apparatus of claim 11 , wherein said program instructions are further operative to cause said signal processing means to repeat said steps of extracting said information, determining said indicator, and comparing said indicator for each one of the remaining input means of said plurality of signal input means.
15. The apparatus of claim 11 , wherein said program instructions are further operative to cause said signal processing means to:
select a transponder;
attempt to acquire the selected transponder; and
repeat said selection of a transponder and attempting to acquire said selected transponder until said selected transponder is acquired.