Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
A cable loss equalization system used in a communication apparatus constructed of a first transmitting/receiving unit, a second transmitting/receiving unit, and a cable for connecting said first transmitting/receiving unit with said second transmitting/receiving unit, said cable loss equalization system compensating for a reduction in a level of a main signal caused by said cable, wherein: said first transmitting/receiving unit comprises: an amplifier for amplifying at least one of a main transmit signal and a main receive signal; a first power source for supplying a first power source voltage to said first transmitting/receiving unit and a second power source of said second transmitting/receiving unit; transmitting means for transmitting said first power source voltage via said cable to said second transmitting/receiving unit; receiving means for receiving a second power source voltage supplied to the second power source of said second transmitting/receiving unit from said second transmitting/receiving unit; and a first control unit for measuring a voltage difference between said first power source voltage and said second power source voltage to thereby perform a gain setting operation of said amplifier.
Claim 2
Dependent Claim
177 words
A cable loss equalization system used in a communication apparatus constructed of a first transmitting/receiving unit, a second transmitting/receiving unit, and a cable for connecting said first transmitting/receiving unit with said second transmitting/receiving unit, said cable loss equalization system compensating for a reduction in a level of a main signal caused by said cable, wherein: said first transmitting/receiving unit comprises: an amplifier for amplifying at least one of a main transmit signal and a main receive signal; a first power source for supplying a first power source voltage to said first transmitting/receiving unit and a second power source of said second transmitting/receiving unit; transmitting means for transmitting said first power source voltage via said cable to said second transmitting/receiving unit; receiving means for receiving a second power source voltage supplied to the second power source of said second transmitting/receiving unit from said second transmitting/receiving unit; and a first control unit for measuring a voltage difference between said first power source voltage and said second power source voltage to thereby perform a gain setting operation of said amplifier.
Claim 3
Dependent Claim
45 words
A cable loss equalization system as claimed in claim 1 wherein: in said communication apparatus, said first transmitting/receiving unit is an indoor unit; said second transmitting/receiving unit is an outdoor unit; and said indoor unit is connected with said outdoor unit by a coaxial cable.
Claim 4
Dependent Claim
54 words
A cable loss equalization system as claimed in claim 1 wherein: said first control unit calculates a DC resistance value of said cable based upon said voltage difference, and determines a required compensation gain based upon a characteristic of a DC resistance value-to-cable loss which is previously stored, and said calculated DC resistance value.
Claim 5
Dependent Claim
58 words
A cable loss equalization system as claimed in claim 3 wherein: the first control operation of the control unit is commenced after the power source of said first transmitting/receiving unit is turned ON, and a gain setting value of the amplifier is determined after a transmit amplifier of said second transmitting/receiving unit has reached a predetermined transmission level.
Claim 6
Dependent Claim
50 words
A cable loss equalization system as claimed in claim 3 wherein: said cable loss equalization system determines a cable loss in accordance with said DC resistance value-to-cable loss characteristic, said DC resistance value, a length of said cable, a sort of said cable, and a frequency of the main signal.