Abstract: The invention provides a connector for coaxial cable which prevents a fall-out of the coaxial cable and has a release function. A sleeve 6 for penetrating between the inner insulator 7b and the outer conductor 7c of the coaxial cable 7, a stopper 3 for preventing the fall-out the coaxial cable 7, and a releaser 5 for releasing the stopper's locking force of the coaxial cable 7 are provided within the main body of the connector 1 to which the coaxial cable is inserted. The stopper 3 has elastic property in diameter, and an inner peripheral portion of the distal end thereof serves as the supporting portion 3a for the coaxial cable and the outer peripheral portion of the distal end thereof serves as the fastening portion 3b for the stopper, hence to support the coaxial cable 7 and prevent the fall-out of the same.

Abstract: When a noise level of upward signal received by a center equipment exceeds a predetermined maximum noise level, line equipment located the closest upstream from a noise source is specified and attenuation of the upward signal on the specified line equipment is increased in levels until the noise level of the upward signal received by the center equipment is equal to or under the maximum noise level. Accordingly, it is possible to prevent abnormal noise to affect the whole system without interrupting the upward signal from a cable modem located downstream of the noise source to the center equipment.

Abstract: An external noise intrusion prevention device preventing intrusion of external noise into a central conductor of a trunk cable in an up signal frequency band is provided. A first filter circuit 3 letting a signal in frequencies of 54 MHz or higher pass is provided between an input terminal 1 and an output terminal 2. A front filter circuit 4a and a rear filter circuit 4b, which constitute a second filter circuit 4, are provided on both ends of the external noise intrusion prevention device, respectively. A noise elimination circuit 6 formed by cascading two connection transformers 6a and 6b is also provided. The two connection transformers 6a and 6b are connected to each other while being arranged in a line symmetrical manner.

Abstract: A primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first insulating transformer. A primary winding of a second insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an output terminal, and balanced lines on the side of the secondary winding of the second insulating transformer is connected to the noise eliminating transformer. One end of each of the primary windings, which is grounded to the ground line, is connected to the middle print of the secondary winding of each insulating transformer.

Abstract: A primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first insulating transformer. A primary winding of a second insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an output terminal, and balanced lines on the side of the secondary winding of the second insulating transformer is connected to the noise eliminating transformer One end of each of the primary windings, which is grounded to the ground line, is connected to the middle point of the secondary winding of each insulating transformer.

Abstract: A primary winding of a first insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an input terminal, and windings of a noise eliminating transformer are provided within balanced lines on the side of a secondary winding of the first insulating transformer. A primary winding of a second insulating transformer for balance-to-unbalance transformation is connected between the central electrode and the outer electrode of an output terminal, and balanced lines on the side of the secondary winding of the second insulating transformer is connected to the noise eliminating transformer. One end of each of the primary windings, which is grounded to the ground line, is connected to the middle point of the secondary winding of each insulating transformer.

Abstract: The invention provides a noise elimination device that can be installed easily on a coaxial cable and that can effectively eliminate noise from both the center conductor and the outer conductor. Coaxial connectors 2 and 3 are provided on both ends of a tube-shaped housing 1 made of an insulator, and a coil made by winding a coaxial cable of thin diameter is around an open magnetic ferrite core is disposed inside the housing 1 and connected to the connectors 2 and 3 at the two ends. The earth-side connector thickness of the outer conductor of the coaxial cable and the connector as well as all earth-side conductors, such as shield members 7 connecting the connectors with the outer conductors of the coaxial cable, is at least 0.1 mm.

Abstract: In a CATV trunk amplifier, downward signal inputted to an input terminal from the center equipment side is inputted to a downward amplifying circuit via a first filter and a second filter, and the amplified downward signal is outputted to the terminal device side via the second filter, the first filter and an output terminal. Upward L signal is inputted from the terminal device side via the output terminal to an upward L amplifying circuit via the first filter and a third filter, and the amplified upward L signal is outputted to the center equipment side via the third filter, the first filter and the input terminal. Upward H signal is inputted to an upward H amplifying circuit via a fourth filter, and the amplified upward H signal is outputted to the center equipment side via the fourth filter and the input terminal.

Abstract: A LAN constituted over a pair of buildings, located a distance from each other, comprises hubs, a server and personal computers. In the LAN, a wired LAN including a wireless transmission section between the pair of buildings, and a wireless LAN including wireless access sections between an access point and wireless terminals are connected to each other. A transmission frequency band (5 GHz) used in the wireless transmission section and a transmission frequency band (2.4 GHz) used in the wireless access sections are set to be distinct from each other so that the deterioration of transmission quality by interference of electric waves used in both of the wireless sections can be securely prevented.

Abstract: A stacked film assembly for use as wiring in a semiconductor device having a bottom film (CVD-W film) 33 and a top film (Al alloy film) 12, where the surface roughness (Ra) of the bottom film is less than 100 .ANG. and the crystal orientation of the top film formed on this surface is controlled, a CVD method for the making thereof, and a semiconductor device in which the stacked film assembly is employed. Even when there is no lattice matching of the bottom film and the top film, crystal orientation of the top film can be sufficiently controlled to provide a targeted face ((111) face with aluminum film), and in particular it will be possible to readily form a stacked film assembly having a satisfactory barrier function as well as sufficient EM resistance and with good film formation.

Abstract: A stacked film assembly for use as wiring in a semiconductor device having a bottom film (CVD-W film) 33 and a top film (Al alloy film) 12, where the surface roughness (Ra) of the bottom film is less than 100 .ANG. and the crystal orientation of the top film formed on this surface is controlled, a CVD method for the making thereof, and a semiconductor device in which the stacked film assembly is employed. Even when there is no lattice matching of the bottom film and the top film, crystal orientation of the top film can be sufficiently controlled to provide a targeted face ((111) face with aluminum film), and in particular it will be possible to readily form a stacked film assembly having a satisfactory barrier function as well as sufficient EM resistance and with good film formation.

Abstract: The present invention describes a method and apparatus for monitoring and indicating engine oil deterioration during the period of the oil's useful life in an internal combustion engine. The system and method permits a determination of the rate of deterioration of the engine oil as a function of oil temperature or RPM of the engine and provides a continous output signal representing the remaining useful life of the oil which is provided to the driver when desired. The present invention therefore, estimates the time when the oil will reach an undesirable deterioration level during the course of operation of the engine rather than indicating, as many prior art systems, only when the oil reaches an undesirable level requiring an oil change.

Abstract: An apparatus for receiving satellite broadcasts comprises a frequency converter for outdoor use to which a receiving antenna is to be connected and a station selector for indoor use to which a television receiver is to be connected, the converter and the selector being connected to each other by a transmission line. The selector supplies the converter with a station-selection signal corresponding to a channel as chosen by the user, through the transmission line. Upon reception of the selection signal, the converter picks up the channel signal corresponding to the selection signal from a number of different broadcast microwave signals intercepted by the antenna, and sends the selected signal to the selector through the line. The signal is then received by the television receiver.