CN-119402389-B - Clamp for testing SAS/SATA plug-in card and backboard Rx

Abstract

The application provides a fixture for SAS/SATA card and backboard Rx test, which comprises a code error instrument, an SAS/SATA test adapter and a backboard, wherein the backboard is connected to an SAS/SATA controller, the code error instrument is used for sending scrambling test signals to the SAS/SATA controller sequentially through the SAS/SATA test adapter and the backboard, and the backboard is further connected to a receiving end of the code error instrument directly through a coaxial line so as to return Rx test data of the SAS/SATA controller to the code error instrument directly.

Inventors

• LEI LIN
• Cao Naiqi
• ZUO MENG
• SONG HAIPENG
• LI QING

Assignees

• 无锡众星微系统技术有限公司

Dates

Publication Date

20260505

Application Date

20241028

Claims (4)

1. 1. The fixture for receiving and testing the SAS/SATA controller and the back plate comprises an error code instrument, an SAS/SATA test adapter and the back plate, wherein the back plate is connected to the SAS/SATA controller, the error code instrument is used for sending scrambling test signals to the SAS/SATA controller sequentially through the SAS/SATA test adapter and the back plate, the SAS/SATA test adapter is further connected to a receiving end of the error code instrument through an amplifier ReDriver, so that the receiving test data of the SAS/SATA controller are amplified and returned to the error code instrument to eliminate error codes of a test signal loop, the error code instrument is connected with the SAS/SATA test adapter through a coaxial cable, and the SAS/SATA test adapter is connected with the back plate through a back plate hard disk connector.
2. 2. The fixture for SAS/SATA controller and backplane receive testing of claim 1 wherein the SAS/SATA test adapter and the error meter are connected to the amplifier ReDriver by PCB conductors, respectively.
3. 3. A fixture for receiving test of SAS/SATA expander and back plate, comprising a error detector, a SAS/SATA test adapter, a front back plate and a back plate, wherein the front back plate is connected to the SAS expander, characterized in that the error detector is used for transmitting scrambled test signals to the SAS expander sequentially via the SAS/SATA test adapter, the back plate and the front back plate, and the SAS/SATA test adapter is further connected to a receiving end of the error detector through an amplifier ReDriver to amplify the received test data of the SAS expander and return the amplified signal to the error detector to eliminate error of a test signal loop, and the SAS/SATA test adapter is connected through a coaxial cable, and the SAS/SATA test adapter and the back plate are connected through a back plate hard disk connector.
4. 4. The fixture for SAS/SATA expander and backplane receive testing of claim 3 wherein the SAS/SATA test adapter and the error meter are connected to the amplifier ReDriver by PCB conductors, respectively.

Description

Clamp for testing SAS/SATA plug-in card and backboard Rx Technical Field The application belongs to the technical field of high-speed signal interfaces, and particularly relates to a fixture for testing SAS or SATA plug-in cards and backboard Rx. Background SAS RX testing typically involves two scenarios. The first scenario is SAS RX testing of a front panel containing SAS expanders. The scrambled signal is sent out by the sender (Transmitter) of the error code apparatus, and sequentially passes through the coaxial cable, the test adapter (SAS std. Test file, also called SAS Plug TEST ADAPTER), the back-plane hard disk connector (connector), the back-plane trace, the back-plane SAS/SATA connector, the SAS/SATA cable, the front-plane SAS/SATA connector, and the front-plane trace to reach the receiver Reciever of the SAS Expander. In a second scenario, in SAS RX testing on PCIE cards including SAS controllers, scrambled signals sequentially reach a SAS/SATA Controller (Controller) Receiver via coaxial cables, SAS std.test files, backplane hard disk connectors, backplane wires, backplane SAS/SATA connectors, SAS/SATA cables, PCIE cards SAS/SATA connectors, and PCIE card upper wires. In the two scenarios, the scrambling damaged code stream reaching the receiving end of the SAS Expander or SAS Controller reciever is balanced and then restored to the digital code stream (the error code has occurred at this time), and the loop (loop back) path is sent to the error code device after being balanced by the Transmitter of the Controller or Expander to decode and compare, so as to calculate the error code rate, and in view of the error code having occurred at the receiving end of the Controller or Expander, the return path should be a lossless link to the error code device optimally. However, limited to the product card form, the return paths for the first scenario would be the front-back board trace, front-back board SAS/SATA connector, SAS/SATA cable, back-back board SAS/SATA connector, back-back board trace, back-back board hard disk connector, SAS std. The return paths of the second scenario are in turn PCIe card upper trace, PCIe card SAS/SATA connector, SAS/SATA cable, backplane SAS/SATA connector, backplane trace, backplane hard disk connector, SAS st structure, coaxial cable, reaching the Receiver end of the error code device, after the long link, the code stream having error code at Contro er or Expander Receiver end is damaged again, and after balanced decoding by the error code device Receiver, new error code may be introduced, thereby affecting the test accuracy. Disclosure of Invention The application aims to provide a fixture for testing SAS/SATA plug-in cards and backboard Rx, which aims to improve the accuracy and efficiency of error rate testing in the testing process. According to a first aspect of the present application, there is provided a fixture for SAS/SATA card and backplane Rx test, comprising a code error meter, a SAS/SATA test adapter and a backplane, wherein the backplane is connected to a SAS/SATA controller, the code error meter is used to send scrambled test signals to the SAS/SATA controller sequentially via the SAS/SATA test adapter and the backplane, and the SAS/SATA controller is further connected directly to a receiving end of the code error meter through a coaxial line to return Rx test data of the SAS/SATA controller directly to the code error meter. In an alternative embodiment, the error gauge and the SAS/SATA test adapter are connected by a coaxial cable, and the SAS/SATA test adapter and the backplane are connected by a backplane hard disk connector. In an alternative embodiment, the backplane and the SAS/SATA controller are connected in sequence by a backplane SAS/SATA connector, SAS/SATA cable. In an alternative embodiment, a switching point is provided on the SAS/SATA cable, one end of the coaxial line is connected to the switching point, and the other end of the coaxial line is connected to the receiving end of the error code apparatus. According to a second aspect of the present application there is provided a fixture for SAS/SATA cards and backplane Rx testing comprising a transcoder, a SAS/SATA test adapter, a front backplane and a back backplane, the front backplane being connected to a SAS expander, the transcoder for transmitting scrambled test signals to the SAS expander via the SAS/SATA test adapter, the back backplane and the front backplane in sequence, and the front backplane further being connected directly to a receiving end of the transcoder by a coaxial line for returning Rx test data of the SAS expander directly to the transcoder. According to a third aspect of the present application, there is provided a fixture for SAS/SATA card and backplane Rx test, comprising a code error meter, a SAS/SATA test adapter and a backplane, the backplane being connected to a SAS/SATA controller, the code error meter being configured to send scrambled test signals to the SAS