Abstract: A wavelength conversion device includes an optical medium that converts a first wavelength-multiplexed light including a plurality of first wavelengths belonging to a first wavelength band to a second wavelength-multiplexed light including a plurality of second wavelengths belonging to a second wavelength band, a first monitor configured to monitor power of the plurality of second wavelengths belonging to the second wavelength band, a storage unit that holds control information for adjusting a conversion characteristic of the optical medium, and a control unit configured to perform control of adjusting the conversion characteristic of the optical medium based on the control information acquired from the storage unit according to a first monitoring result by the first monitor.

Abstract: In a knitted fastener stringer, a fastener element is fixed by a fixing chain stitch yarn disposed on an element attaching portion of a fastener tape. This fixing chain stitch yarn has a first needle loop which is knitted into a ground structure and a second needle loop which fixes upper and lower leg portions of the fastner element. As a result, it is possible to achieve an improvement of productivity and a large reduction of a manufacturing cost by increasing a knitting speed and further to stably obtain flexibility and a soft texture in the knitted fastener stringer.

Abstract: A knitted slide fastener in which a stable knitted mode of a knitting structure is maintained, and a fastener element row is strongly attached to a warp knitting fastener tape. A fixing chain knitting yarn of the fastener element row in the fastener element attaching portion and knitting yarns configuring a ground structure are knitted with independent single structures, respectively. Needle loops which are connected to each other in a longitudinal direction of the fixing chain knitting yarn mounts each of element legs of the continuous fastener element row, sinker loops which are connected to each other in the longitudinal direction of the fixing chain knitting yarn go under a sinker loop of a second warp knitting yarn which configures the ground structure and cross each other.

Abstract: In a knitted fastener stringer, an element attaching portion of a fastener tape is configured by using at least a fixing chain stitch yarn which fixes a fastener element, and this fixing chain stitch yarn comprises a first needle loop which is knitted into a ground structure and a second needle loop which fixes upper and lower leg portions. Also, the one first and one second needle loops of the fixing chain stitch yarn is formed at each one pitch of the fastener element. As a result, it is possible to achieve an improvement of productivity and a large reduction of a manufacturing cost by increasing a knitting speed when knitting the knitted fastener stringer and further to stably obtain flexibility and a soft texture in the knitted fastener stringer.

Abstract: A woven slide fastener which is knitted using a double-bed-type warp knitting machine, in which a stable woven mode of a ground structure is maintained and a fastener element row is strongly attached to a warp knitting fastener tape stably in size. A fixing chain knitting yarn of the fastener element row in the fastener element attaching portion and knitting yarns configuring a ground structure are knitted with independent single structures, respectively. Needle loops which are connected to each other in a longitudinal direction of the fixing chain knitting yarn presses each of element legs of the continuous fastener element row toward the ground structure, sinker loops which are connected to each other in the longitudinal direction of the fixing chain knitting yarn go under a sinker loop of a second warp knitting yarn which configures the ground structure and cross each other.

Abstract: This invention provides a knitted slide fastener, wherein at least a part of a base structure composing respective wales (W11 to W13) of a fastener element attaching portion (EF) of a fastener tape includes a ground chain knitting yarn composed of a single structure, and a partial needle loop of a fixing chain knitting yarn composes a double base structure while being interlaced only with the needle loop of the ground chain knitting yarn of the second wale (W12), the partial needle loop of a fixing chain knitting yarn to be formed on at least the second wale (W12) at a second row from the side nearest to a coupling head portion (EH) of the fastener element attaching portion (EF) among the three or more fixing chain knitting yarns of the fastener element attaching portion (EF), the knitted slide fastener being organized at a high speed with few kinds of stitches without an excess load on a needle, an element being solidly fixed.

Abstract: This invention provides a knitted slide fastener, wherein at least a part of a base structure composing respective wales (W11 to W13) of a fastener element attaching portion (EF) of a fastener tape includes a ground chain knitting yarn composed of a single structure, and a partial needle loop of a fixing chain knitting yarn composes a double base structure while being interlaced only with the needle loop of the ground chain knitting yarn of the second wale (W12), the partial needle loop of a fixing chain knitting yarn to be formed on at least the second wale (W12) at a second row from the side nearest to a coupling head portion (EH) of the fastener element attaching portion (EF) among the three or more fixing chain knitting yarns of the fastener element attaching portion (EF), the knitted slide fastener being organized at a high speed with few kinds of stitches without an excess load on a needle, an element being solidly fixed.

Abstract: A CATV communication system includes a center and a plurality of terminal devices connected via a CATV net. The center includes: a first transmitter for transmitting upstream channel use information representing unoccupied channel; a first detector for detecting channel get request from data transmitted from the terminal device; a second detector for detecting a presence of the unoccupied channel; a second transmitter for assigning one of the detected unoccupied channels to the terminal device transmitted the channel get request and for transmitting channel assign data including a designation of the assigned channel; and a first communication unit for performing data communication with the terminal device via the assigned channel.

Abstract: A multiband PLL frequency synthesizer is disclosed which includes: a reference signal generation circuit for generating a reference signal of which frequency is controlled; a phase comparator for generating a phase difference signal; a low-pass filter circuit for low-pass-filtering the phase difference signal with one of a plurality of cutoff frequencies selected; a VCO for generating and outputting a LO signal according to an output of the low-pass filter; a frequency dividing circuit having an integer frequency dividing mode and a fraction frequency dividing mode to supply the frequency-divided signal to the phase comparator; and a control circuit for supplying the reference frequency control signal to the reference signal generation circuit, a filter control signal to the low-pass filter circuit, and frequency dividing control signal (data) to the frequency dividing circuit in accordance with a frequency command signal.

Abstract: The present invention intends to provide a knitted-in slide fastener having a flexibility and capable of securing a desired coupling strength, in which a trace of the fastener element row is unlikely to be made by ironing. A basic structure of knitting of a fastener element attaching portion formed along a side edge of a fastener tape is formed of chain knitting yarns and weft in-laid yarns. A fastener element row is disposed on an upper face of sinker loops of binding chain knitting yarns, attaching portion foundation chain knitting yarns and the weft in-laid yarns and a leg portion of each element portion is tightened and bound by needle loops of the binding chain knitting yarns from an upper face thereof. The weft in-laid yarns inserted such that they are inverted alternately between two rows of wales disposed in the element attaching portion beside the tape main portion have a size larger than other weft yarns.

Abstract: A radio communication apparatus is designed for at least first and second radio communication formats which prescribe first and second desired IF pass bandwidths respectively. The first desired IF pass bandwidth is greater than the second desired IF pass bandwidth. The radio communication apparatus includes an IF band-pass filter processing a first IF signal into a second IF signal and having a predetermined pass bandwidth corresponding to the first desired IF pass bandwidth. A demodulator recovers a first baseband signal from the second IF signal generated by the IF band-pass filter. A baseband filter processes the first baseband signal generated by the demodulator into a second baseband signal. The first baseband signal generated by the demodulator is selected as a final output signal when the first IF signal is of the first radio communication format.

Abstract: The present invention provides a warp-knit slide fastener in which a fastener element row can be easily knitted into and attached stably and firmly on a fastener tape, and fastener elements of the fastener element row are not separated from each other due to pushing up of a fastener face.The successive fastener element row is knitted, simultaneously with knitting of the fastener tape, into a fastener element attaching portion at longitudinally side edge portion of the fastener tape, and is fixed by two wales or more of fixing chain stitch yarns. Respective needle loops of the respective fixing chain stitch yarns push respective element leg portions of the successive fastener element row from above toward a foundation structure. Respective sinker loop groups form a part of the foundation structure on which the successive fastener element line is disposed. Warp in-laid yarns are warp inserted through at least a part of sinker loops of the sinker loop groups while being intermingled.

Abstract: A receiving mixer device for a mobile radio transceiver which operates with multiple modulation modes and within multiple frequency bands. The receiving mixer includes a plurality of mixers each for converting a received radio frequency signal to an intermediate frequency, a common connection part to which output terminals of the mixers are connected in common, a plurality of impedance conversion circuits connected to the common connection part, and output terminals for the impedance conversion circuits. The number of mixers is equal to the number of frequency bands of the received radio frequency signal. The number of the intermediate frequencies is equal to the number of modulation modes of the received radio frequency signal. The number of the impedance conversion circuits is equal to the number of intermediate frequencies, and each of the impedance conversion circuits passes only a single predetermined frequency of the intermediate frequencies used by the device.

Abstract: The invention presents a high efficiency linear power amplifier of plural frequency bands reduced in the number of parts and elements, simplified in the circuit construction, and saved in the circuit space, and in FIG. 1, signals entering from a common input terminal 1 in frequency bands A and B are matched in both frequency bands A and B in a wide band matching network 2, amplified in a pre-amplifier 3, put into a common terminal 4a of a switch circuit 4, and the signal in frequency band A is put into a changeover terminal 4b, matched in a matching network 5 and amplified in a post-amplifier 6, and its output is matched in a post-matching network 7 and sent out into an output terminal 8, while, similarly, the signal in frequency band B is put into other changeover terminal 4c of the switch circuit 4, matched in a matching network 9, amplified in a post-amplifier 10, and its output is matched in a post-matching network 11 and is sent out into an output terminal 12.

Abstract: A multiplicity of knitting needles and one or more knitting needles are slid vertically along first and second needle beds, respectively, which are disposed in a back-to-back relationship with and spaced a predetermined distance from each other. The second needle bed extends along only one end portion of the first needle bed. And at the same time, a predetermined number of knitting yarn guides are swung and shogged. During that time, a monofilament bending means disposed near one end of the first needle bed reciprocates along the upper space between the first and second needle beds at an underlapping position to continuously form individual fastener elements by bending the monofilament and to knit the formed fastener elements successively in a warp-knit fastener tape by the back-to-back needles in the first and second needle beds simultaneously with the knitting of the tape.

Abstract: A necessary number of knitting needles are slid at a predetermined timing along a multiplicity of parallel sliding grooves of a single needle bed, and a predetermined number of knitting yarn guides take lapping movements to form desired stitches of the knitting yarns while a monofilament bending means between one end of the needle bed and the yarn guides is operated at a predetermined timing for reciprocating along a predetermined number of knitting yarns at an underlapping position. During this reciprocating movement, a head-portion-holding member is moved between a holding position for holding a head portion of each fastener element from an inside thereof and a non-holding position, in synchronism with the bending of a monofilament.

Abstract: In a knit slide fastener in which a continuous fastener element row is knitted in a fastener element attaching marginal portion of each of fastener tapes simultaneously with the knitting of the fastener tape, the fastener element attaching marginal portion includes a plurality of parallel binding chain stitch yarns extending longitudinally of the marginal portion for holding the fastener element row to the marginal portion. One of the binding chain stitch yarns, which is adjacent to coupling heads of fastener elements, is larger in size than the remaining binding stitch yarns.

Abstract: A knit slide fastener stringer including a fastener tape knitted in a warp-knit ground structure and having along one longitudinal edge an element-attaching portion, and a continuous fastener element row knitted in and along the element-attaching portion of the fastener tape and secured by two or more wales of anchoring chain stitch yarns simultaneously with the knitting of the fastener tape. In this knit slide fastener stringer, successive needle loops of each of the two or more wales formed of the anchoring chain stitch yarns press the continuous fastener element row toward the warp-knit structure of said fastener tape from the upper side, and successive sinker loops constitute part of the ground structure. And a number of warp-inlaid yarns are each laid in and interlaced with at least part of the successive sinker loops. The result is that the ground structure of the element-attaching marginal portion is kept in accurate size to prevent the coupled fastener element rows from locally splitting.

Abstract: A knit slide fastener stringer comprising: a fastener tape knit in a warp-knit ground structure and having along one longitudinal edge an element-attaching marginal portion, and a continuous fastener element row knitted in and along the element-attaching marginal portion of the fastener tape and secured by anchoring chain stitch yarns of at least two wales simultaneously with the knitting of the fastener tape. In the slide fastener stringer, an additional anchoring chain stitch yarn independent from the anchoring chain stitch yarns is disposed between the anchoring chain stitch yarns near the coupling head portions and successive coupling head portions, extending warpwise over the fastener element row. And a connecting yarn extending weftwise substantially diagonally in gaps between adjacent fastener elements from the upper side to the lower side connects the additional anchoring chain stitch yarn with the ground structure of the fastener tape.

Abstract: In a knit slide fastener in which a continuous fastener element row is knitted in a fastener element attaching portion of each fastener tape simultaneously with the knitting of the fastener tape, a plurality of laid-in weft yarns are knitted in the warp-knit structure of the fastener element attaching portion so as to turn alternately in every course and to be interlaced with knit loops of a chain stitch extending along the outermost edge of the fastener element attaching portion, and the fastener element row is secured to the ground structure of the attaching portion by two binding chain stitches.