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20130326bk_ USB2.0 Loopback Plugs
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USB 2.0 Loopback plugs are one of the fastest methods to diagnose, troubleshoot and load test your PC's USB functions.

When used with compatible PassMark testing software (see below) is it possible to:

?Quickly check if a USB port is powered;

?Check that data can be sent and received from the port;

?Check USB errors rates and transmission speed (up to 480Mbits/sec) in Windows;

?Measure the level of recovered data (retransmitted frames);

?Verify that the system remains stable under long periods of load;

?Test that USB support in Windows or Linux is available;

?Test self powered USB hubs and PC ports function correctly;

?Check USB cabling;

?Concurrently check multiple USB ports at the same time;

?Benchmark your PC's USB ports & hubs; and

?Check if your PC ports are high speed 480Mbits/sec (USB 2.0), or full speed 12Mbits/sec (USB 1.x) via a LED

Active loopback plugs are the quickest, most effective way to verify that a PC's USB ports are working correctly. The Red, Green and Yellow LED's on the front of this USB adapter plug provide a quick visual indication of I/O activity and if the USB bus is powered. This will dramatically improve the troubleshooting and diagnostic ability of computer technicians and system integrators, who have previously been working blind.

In benchmark mode (Windows only), the device is capable of reaching the maximum defined transfer speed for USB2.0, 480Mbit/sec. Note: Testing has shown that most PC's can not attain speeds much above 300Mbits/sec and performance will vary depending on your motherboard, CPU and other USB devices connected to the PC.

Up to 10 of these USB test plugs can be simultaneously connected to a PC providing that free USB ports are available on the PC or on a down stream hub and sufficient power is available.

These plugs are unique! They are the only true USB 2.0 loop back adapters on the market and have been especially designed for use with our BurnInTest Professional, BurnIntest for Linux software package or USB2Test stand alone software (supplied with the plug). They do not require an external power supply and do not require a connection to any other port on a PC. Each plug also has its own serial number stored in EPROM, on the plug, so it is possible to identify each plug when multiple plugs are connected.

Each plug also contains its own CPU and executes its own firmware (which can be upgraded in the future by download) .

Technical Specifications

USB standard	2.0 HighSpeed and FullSpeed(and is backwardly compatible with USB 1.1 and 1.0)
Plug and play	???????? Compliant
Physical connector	Standard 4 wire USB(2 x Balanced Signal, 1 Voltage [VBUS], 1 Ground [GND])
USB Transfer modes	???????? Bulk
Voltage	4.4V - 5.25V. (No external power supply is required)
Current	???????? 250mA (Theoretical Max), 60mA (Typical Operation)
Clock speed	???????? 24Mhz
Device memory	???????? 8KB
Case	???????? High impact MABS plastic
Size	???????? 65mm x 50mm x 20mm (2.5 x 2.0 x 0.8 inches)
Weight	???????? 35g (1.3oz)
Indicators	Orange LED = USB2.0 (HighSpeed ) or USB1.0 (FullSpeed ) indicator Green LED = Transmit data Red LED 1 = Power from USB bus Yellow LED = Receive data Red LED 2 = USB bus transmission error indicator
EMC standards	???????? AS/NZS 3548 1995, EC
Storage Temperature	???????? -20 ?C to + 70 ?C
Usage Temperature	???????? 0 ?C to + 45?C
Max speed	???????? 480 Mbits/sec
Model number	???????? PMUSB02 (rev2)
RoHS (Lead free)	???????? Yes

Cabling

The USB cable is not sold with the plugs at the moment. You will need to supply your own standard A to B USB cable. While just about any USB cable will work, it is better to select a quality high speed, shielded, USB cable when testing. Note that some of the cheaper USB cables are not shielded and thus are not recommended. The cable must be shorter than the 5m allowed in the USB standard. If a USB connection is required beyond 5m one or more hubs are required to extend a USB connection. We have noted during our testing that longer cables are more likely to have higher error rates.

Compatibility

WIN32: Windows XP SP3, 2003 Server, Vista, 2008 Server and Windows 7 are supported.

WIN64: 64-bit Windows XP SP3, 64-bit 2003 Server, 64-bit Vista, 64-bit 2008 Server and 64-bit Windows 7 are supported.

Linux: Kernel 2.6.9 or higher and LibUSB are required. Only the loopback funtions are supported (not benchmark functions).

Window 95, 98, ME, NT4, 2000 and Mac are not supported.

In order to use the plugs you also need at least one of the following 3 software applications.

A) BurnInTest Professional for Windows version 4.0 or higher, or

B) The free stand alone USB2Test software for Windows, or

C) BurnInTest for Linux version 2.0 or higher.

USB 2.0 and 1.1 ports are supported. (when connected to a USB 1.1 port only the lower speed, USB 1.1, mode will be used)

Plugs will work with motherboard USB ports and hub connected USB ports.