# USB port loop back plug

(Applicable to BurnInTest Pro version only)

## USB1 port loop back plug

Active USB 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.

Using these plugs, error free transfer speeds of around 700 - 800 Kbits/sec per port can be expected on a system that is functioning correctly.

Technical specifications

USB standard:1.1 (but is forwardly compatible with USB 2.0’s FullSpeed)

Plug and play:Compliant

Physical connector:4 wire. (2 x Balanced Signal, 1 Voltage [VBUS], 1 Ground [GND])

USB Transfer modes:Bulk

Voltage:4.4V – 5.25V

Current:90mA (typical operation)

Clock speed:6.00Mhz input to x8 multiplier

Device buffer:384 bytes Rx, 128 byte Tx

Case:High impact MABS plastic

Size:65mm x 50mm x 20mm
(2.5 x 2.0 x 0.8 inches)

Weight:30.5g (1.1oz)

EMC standards:AS/NZS 3548:1995, EC

Storage Temperature:-20 ºC to + 70 ºC

Usage Temperature:0 ºC to + 50 ºC

USB 2.0 loopback and benchmarking plug

USB 2 Loopback plugs can be used to help diagnose, troubleshoot and load test your PC’s USB 1.x and 2.0 ports. Five status LEDs on the USB 2 Loopback plug will dramatically improve the troubleshooting and diagnostic ability of computer technicians and system integrators, who have previously been working blind.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. The Orange LED will provide a quick indication whether the PC port is currently supporting the higher USB 2.0 speed (up to 480Mb/s) or the lower speed found with USB 1.x (of up to 12 Mb/s). The leftmost red LED indicates whether recoverable bus error (retransmission of data) has occurred.

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 software package. 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: | 500mA (less than 100mA during initial enumeration)
Clock speed: | 24Mhz
Device data buffers: | 3 x 64-byte control. 4Kbyte data available
Device memory: | 8KB Firmware code and data available
Case: | High impact MABS
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 ºC to + 70 ºC
Usage Temperature: | 0 ºC to + 45ºC
Max speed: | 480 Mbits/sec

Compatibility

Windows 2000 and XP are supported.
Window 95, 98, ME, NT4, Mac & Linux are not supported.
In order to use the plugs BurnInTest Professional version 4.0 or above is required or the stand alone test software 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)

For further details regarding any of the products in this section please see the PassMark website: www.passmark.com

See also

USB ports test

USB test preferences