TWI412771B - Sas interface output signal detecting apparatus - Google Patents

Abstract

An SAS interface output signal detecting apparatus includes an SAS female connector, an SAS male connector, and two SMA connectors. The SAS female connector includes a first group of data pins, a second group of data pins, and a group of power pins. The group of power pins of the SAS female connector is connected to corresponding pins of the SAS male connector. When the first group of data pins of the SAS female connector is connected to the SAS male connector, the second group of data pins of the SAS female connector is unconnected to the SAS male connector and two data output pins of the second group of data pins of the SAS female connector are connected to the two SMA connectors respectively. When the second group of data pins of the SAS female connector is connected to the SAS male connector, the first group of data pins of the SAS female connector is unconnected to the SAS male connector and two data output pins of the first group of data pins of the SAS female connector are connected to the two SMA connectors respectively.

Description

SAS interface output signal detecting device

The present invention relates to a signal detecting device, and more particularly to a detecting device for detecting a SAS interface output signal of an electronic device having a SAS interface.

SAS (Serial Attached SCSI) interface Chinese name is connected to the SCSI interface in series, or serially connected to the small computer system interface. As a new generation of SCSI technology, due to its advantages of fast transmission speed, good compatibility and low cost, electronic devices with SAS interface have been widely used in various fields, such as SAS hard disk for enterprise level. In a workstation or storage device.

The SAS hard disk has two sets of data connections (double turns), each consisting of output input signals, which are controlled by separate chips. In the memory product with SAS technology as the transmission architecture, we need to detect the output signal of the SAS hard disk to evaluate the design quality of the system connected to it based on the detection result. The current detection method is to use the oscilloscope probe to directly touch the signal output end corresponding to the SAS interface on the hard disk when reading the hard disk data, which will cause the following problems:

1. The test pattern output by the hard disk is not the specified pattern defined in the measurement specification, but a random data flow, which will affect the accuracy of the test.

2. The probe directly contacts the signal output of the SAS interface and measures it as a non-standard test method. Due to the impedance mismatch, the test result will be inaccurate.

3. It is not possible to adjust the voltage amplitude and pre-emphasis of the signal output from the SAS interface signal output on the hard disk to suit different system designs.

In view of the above, it is necessary to provide a SAS interface output signal detecting device for accurately and conveniently detecting the signal outputted by the signal output end of the SAS interface of the electronic device.

A SAS interface output signal detecting device includes a detecting board, wherein the detecting board is provided with a SAS female connector, a SAS male connector and two SMA connectors, and the SAS female connector is used for connecting an electronic device. The SAS interface of the device, the SAS male connector is used to connect to a SAS interface of a system, and the two SMA connectors are connected to a pair of probes of an oscilloscope, and the pins on the SAS female connector include three In part, the first part is the first data connection pin, the second part is the second data connection pin, the third part is the power signal pin, the third part of the power signal pin and the SAS male connector The power signal pins are correspondingly connected, and when the first group of data connection pins of the first part are connected to the pins of the SAS male connector, the second group of data connection pins of the second part are not connected to the SAS a male connector is connected, and two data output pins of the second group of data connection pins of the second portion are respectively connected to the two SMA connectors, and the second group of data connection pins of the second portion The pins of the SAS male connector are connected A first set of data of the first portion is not connected to the connection pin SAS male connector, and the first set of data of the first portion is connected to two data output pin connector pins are connected to the two SMA.

A SAS interface output signal detecting device includes a first detecting board and a second detecting board. The first and second detecting boards are respectively provided with a SAS female connector and a SAS male connector. Two SMA connectors for connecting a SAS interface of an electronic device for connecting to a SAS interface of a system for connecting a pair of probes to an oscilloscope The pin on the SAS female connector comprises three parts, the first part is the first group data connection pin, the second part is the second group data connection pin, and the third part is the power signal pin, the third part is the power signal pin, The power signal pin of the third part is connected to the power signal pin of the SAS male connector, and the first group of data connection pins of the first part and the SAS male connector are connected to the first detection board. The pins are correspondingly connected, the second group of data connection pins of the second part are not connected to the SAS male connector, and the two data output pins of the second group of data connection pins of the second part are respectively Two SMA connectors are connected, and on the second detection board, the first A portion of the second set of data connection pins are connected to the pins of the SAS male connector, and the first set of data connection pins of the first portion are not connected to the SAS male connector, and the first part of the first part Two data output pins of the group data connection pins are respectively connected to the two SMA connectors.

Compared with the prior art, the SAS interface output signal detecting device transmits the data between the electronic device and the system through the SAS female connector and the SAS male connector, and only one set of data connection pins are connected at the same time. Working, and the data output pin of another set of data connection pins is detected through the SMA connector, so that the data output pin of the electronic device corresponding to the data output pin of the unworked data connection pin The output test pattern can be set by the control signal of the working data set pin receiving system, and the voltage amplitude, pre-emphasis and other parameters can be set through the control signal of the receiving system. In addition, the oscilloscope's probe is connected through the SMA connector, and the impedance setting can meet the impedance matching requirements. This can greatly improve the accuracy and convenience of the test.

Referring to FIG. 1 and FIG. 2, a preferred embodiment of the SAS interface output signal detecting apparatus of the present invention includes a first detecting board 10 and a second detecting board 20, and the first detecting board 10 and the second detecting board The components of the test board 20 are identical, and each includes a SAS female connector J1, a SAS male connector J2, and two SMA (SubMiniature version A) connectors J3 and J4. The SAS female connector J1 is disposed on the upper surface of the board for inserting the SAS interface of an electronic device. The SAS male connector J2 is disposed at one end of the board for plugging in the SAS interface of the system to be evaluated. The two SMA connectors J3 and J4 are disposed at the other end of the board for connecting to an oscilloscope.

The pin on the SAS female connector J1 includes three parts, the first part S1-S7 is the first group data connection pin, the second part S8-S14 is the second group data connection pin, the third part P1-P15 are power signal pins. The two SMA connectors J3 and J4 have a 50 ohm impedance matching characteristic, and other embodiments may also use other SMA connectors with impedance matching parameters.

The difference between the first detecting board 10 and the second detecting board 20 is:

On the first detecting board 10, the second portion S8-S14 and the third portion P1-P15 of the pin on the SAS female connector J1 are connected to the pins on the SAS male connector J2, and The first portion S1-S7 of the pin on the SAS female connector J1 is not connected to the pin on the SAS male connector J2, and the data in the first portion S1-S7 of the pin on the SAS female connector J1 Output pins S5 and S6 are connected to the SMA connectors J3 and J4, respectively.

On the second detecting board 20, the first portions S1-S7 and the third portions P1-P15 of the pins on the SAS female connector J1 are correspondingly connected to the pins on the SAS male connector J2, and the The second portion S8-S14 of the pin on the SAS female connector J1 is not connected to the pin on the SAS male connector J2, and the second portion of the SAS female connector J1 is in the second portion S8-S14 Data output pins S12 and S13 are connected to the SMA connectors J3 and J4, respectively.

Referring to FIG. 3, when detecting, two electronic devices, such as SAS hard disks 100 and 200, are respectively connected to the SAS female connector J1 of the first detecting board 10 and the second detecting board 20, and the first The SAS male connector J2 of the detecting board 10 and the second detecting board 20 are respectively connected to the corresponding SAS interface of the backplane 400 of a system to be evaluated (such as an accessor system), and the first detecting is performed. The SMA connectors J3 and J4 of the measuring board 10 are respectively connected to a pair of probes of an oscilloscope 300, and the SMA connectors J3 and J4 of the second detecting board 20 are respectively connected to another pair of probes of the oscilloscope 300.

The backplane 400 is further connected to the plurality of power supplies 500 for providing power signals to the SAS hard disks 100 and 200. The backplane 400 is also connected to a server 700 through two expanders 600. The server 700 can be expanded. The controller 600 transmits control signals to the two SAS hard disks 100 and 200. In other embodiments, the system may also include other components, such as a central processing unit, which are not specifically described herein because they are conventional techniques.

For the SAS hard disk 100, the server 700 communicates with the SAS hard disk 100 through the second portion S8-S14 on the SAS female connector J1 on the first detecting board 10, and outputs control through the server 700. The signal can be set on the SAS hard disk 100 and the voltage amplitude and pre-emphasis of the output signal of the data output pin corresponding to the data output pins S5 and S6 in the first part S1-S7 of the SAS female connector J1. And setting a test pattern conforming to the test requirement, so that the signal output from the data output pin corresponding to the data output pins S5 and S6 in the first part S1-S7 of the SAS female connector J1 is connected to the SAS hard disk 100. Meet the test requirements and then observe through the oscilloscope 300. Similarly, for the SAS hard disk 200, the control signal is outputted through the server 700 to make the data corresponding to the data output pins S12 and S13 in the second portion S8-S14 of the SAS female connector J1 on the SAS hard disk 200. The output signal of the output pin meets the test requirements and can be observed through the oscilloscope 300.

Compared with the prior art, the test pattern outputted by the data output pins of the two SAS hard disks 100 and 200 is a prescribed pattern defined in the measurement specification, which can greatly improve the accuracy of the test; the probe of the oscilloscope 300 is through the SMA. The connectors J3 and J4 are connected to the data output pins of the SAS hard disk 100 and the SAS hard disk 200 to satisfy the impedance matching; in addition, the signals output from the data output pins of the SAS hard disk 100 and the SAS hard disk 200 can be transmitted through the server. The 700 is set for parameters such as voltage amplitude and pre-emphasis, so it can be applied to different systems.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10‧‧‧First detection board

20‧‧‧Second detection board

J1‧‧SAS female connector

J2‧‧SAS male connector

J3, J4‧‧‧SMA connector

100, 200‧‧‧SAS hard disk

300‧‧‧ oscilloscope

400‧‧‧ Backplane

500‧‧‧Power supply

600‧‧‧Expander

700‧‧‧Server

1 is a schematic diagram of a first detection board of a preferred embodiment of the SAS interface output signal detecting apparatus of the present invention.

2 is a schematic diagram of a second detection board of a preferred embodiment of the SAS interface output signal detecting apparatus of the present invention.

FIG. 3 is a schematic diagram of detecting an output signal of a SAS interface of an electronic device by using the SAS interface output signal detecting device of the present invention.

10‧‧‧First detection board

J1‧‧SAS female connector

J2‧‧SAS male connector

J3, J4‧‧‧SMA connector

Claims (8)

A SAS interface output signal detecting device includes a detecting board, wherein the detecting board is provided with a SAS female connector, a SAS male connector and two SMA connectors, and the SAS female connector is used for connecting an electronic device. The SAS interface of the device, the SAS male connector is used to connect to a SAS interface of a system, and the two SMA connectors are connected to a pair of probes of an oscilloscope, and the pins on the SAS female connector include three In part, the first part is the first data connection pin, the second part is the second data connection pin, the third part is the power signal pin, the third part of the power signal pin and the SAS male connector The power signal pins are correspondingly connected, and when the first group of data connection pins of the first part are connected to the pins of the SAS male connector, the second group of data connection pins of the second part are not connected to the SAS a male connector is connected, and two data output pins of the second group of data connection pins of the second portion are respectively connected to the two SMA connectors, and the second group of data connection pins of the second portion The pins of the SAS male connector are connected A first set of data of the first portion is not connected to the connection pin SAS male connector, and the first set of data of the first portion is connected to two data output pin connector pins are connected to the two SMA. The SAS interface output signal detecting device according to claim 1, wherein the SMA connector has a 50 ohm impedance matching characteristic. The SAS interface output signal detecting device according to claim 1, wherein the electronic device is a SAS hard disk. The SAS interface output signal detecting device according to claim 1, wherein the system is an accessor system. A SAS interface output signal detecting device includes a first detecting board and a second detecting board. The first and second detecting boards are respectively provided with a SAS female connector and a SAS male connector. Two SMA connectors for connecting a SAS interface of an electronic device for connecting to a SAS interface of a system for connecting a pair of probes to an oscilloscope The pin on the SAS female connector comprises three parts, the first part is the first group data connection pin, the second part is the second group data connection pin, and the third part is the power signal pin, the third part is the power signal pin, The power signal pin of the third part is connected to the power signal pin of the SAS male connector, and the first group of data connection pins of the first part and the SAS male connector are connected to the first detection board. The pins are correspondingly connected, the second group of data connection pins of the second part are not connected to the SAS male connector, and the two data output pins of the second group of data connection pins of the second part are respectively Two SMA connectors are connected, and on the second detection board, the first A portion of the second set of data connection pins are connected to the pins of the SAS male connector, and the first set of data connection pins of the first portion are not connected to the SAS male connector, and the first part of the first part Two data output pins of the group data connection pins are respectively connected to the two SMA connectors. The SAS interface output signal detecting device of claim 5, wherein the SMA connector has a 50 ohm impedance matching characteristic. The SAS interface output signal detecting device according to claim 5, wherein the electronic device is a SAS hard disk. The SAS interface output signal detecting device according to claim 5, wherein the system is an accessor system.