摘要:
An improved precompensation circuit includes a greatly improved differentiator in the dispersion precompensation path, a preprocessor in the dispersion precompensation path for reducing f2−f1 type Composite Second Order (CSO) distortion, and a broadband phase shifter for compensating undesired vector interaction between the laser predistortion and dispersion compensation.
摘要:
A server rack includes a base and a receiving bracket secured to the base. The base includes a pair of parallel guiding rails. A limiting member is formed on each guiding rail and extends along a first direction. A horizontal guiding slot is defined in the limiting member along an extension direction of each guiding rail. The receiving bracket is supported on and slidable long the guiding rails in the first direction, including a pair of opposite sidewalls parallel to the guiding rails. A horizontal sliding portion is formed on each sidewall of the receiving bracket corresponding to the guiding slot of the limiting member, and engaged with the guiding slot in a second direction perpendicular to the first direction when the receiving bracket is entirely retracted into the base, to prevent the receiving bracket shaking relative to the base during shipment.
摘要:
A computer enclosure includes a bottom plate (12), a rear plate (14), and a mounting plate (60). The rear plate is perpendicular to the bottom plate for securing an expansion card (100) thereon. The mounting plate is perpendicularly secured on the bottom plate for securing a riser card (80) thereon, and perpendicular to the rear plate. A receiving structure (66) is defined in the mounting plate for a socket (88) formed on the riser card inserting therethrough to electronically receive a part of the expansion card.
摘要:
A computer enclosure for mounting a disk drive bracket includes a chassis for receiving the disk drive bracket, and an extending plate releasably positioned and aligned at an end of the chassis. One portion of the disk drive bracket is fixed on the chassis, and the other portion is fixed on the extending plate. The disk drive bracket is completely mounted on the chassis and the extending plate.
摘要:
A standing apparatus for mounting electrical components to a base plate (10), the standing apparatus includes the base plate, a standing member (20), and a clamping member (30). The base plate defines a recess (12) in a first face, and a hole (14) extends through the recess to a second face opposite to the first face. The standing member includes a positioning collar (22) and a standing pillar (24). The standing pillar has a groove (242). The clamping member includes a base portion (32) and a domelike portion (34), the domelike portion has a plurality of spring clips (36), the spring clips encircling the standing pillar and received in the groove of the standing member for retaining the standing member to the base plate.
摘要:
A data storage device carrier assembly includes a first carrier, a second carrier, and a bracket. The first carrier includes a pair of parallel side walls configured for mounting large data storage devices therebetween. The second carrier includes a pair of parallel side plates configured for mounting small data storage devices therebetween. A distance between the pair of side plates of the second carrier is less than a distance between the pair of side walls of the first carrier. The bracket is attached on one of the side plates of the second carrier to cooperatively form a unit having a width approximately same as the distance between the pair of side walls of the first carrier. The unit is mountable between the side walls of the first carrier.
摘要:
A disk drive assembly is mounting in an enclosure (1). The enclosure has a bar (12). The disk drive includes a disk drive (4), a mounting bracket (2), and a converter card (3). The disk drive has a top surface (41), opposite side surfaces (43) and a back surface (45) perpendicular to the top surface. The disk drive has a first output connector on the back surface. The mounting bracket has a pair of feet (248) attached to the side surfaces of the disk drive and a mounting board (22) attached to the back surface of the disk drive. A resilient arm (5) with a protrusion (53) is formed on the resilient arm for engaging with the bar. The converter card is received in the mounting bracket, the converter card has a circuit board (31) parallel to the top surface of the disk drive.
摘要:
A mounting apparatus for an expansion card (30) includes a computer panel (12), a bracket (14) mounted to the computer panel, and a card holder (20) mounted to the bracket. At least a post (1416) is formed on the bracket. The card holder includes a body (22) glidingly mounted to the bracket for installing the expansion card and a handle (24) resisted by the post of the bracket for preventing the body from sliding out so as to fix the card holder in position.
摘要:
A testing device is provided to include a pre-boot execution environment (PXE) server, a dynamic host configuration protocol (DHCP) server, and a computer. The computer is connected to the PXE server and the DHCP server via a network. The PXE server includes an image file stored therein, a communicating module of server terminal and a communicating module of client terminal. The computer includes a network device for supporting PXE functions. A testing method is provided to include following steps: connecting the PXE server and the DHCP server to the computer via the network, the DHCP server assigning an IP address to the computer, the computer downloading the communicating module of client terminal from the PXE server, for communicating with the communicating module of server terminal, and the image file being run to test the computer.