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The Packet-Master USB480 is a Hardware USB Bus Analyser, intended for development of Low, Full and High Speed USB devices and hubs etc. It comes complete with our Windows application Graphic USB for capturing and displaying every detail of the data interactions on a USB link. (For new enhanced model with Advanced Trigger functionality see Packet-Master USB480+) (For Full/Low Speed Only Analyser see Packet-Master USB12) Download Packet-Master Product Data Sheet (PDF) Download Packet-Master USB12 / USB480 / USB480+ Manual (1.25 Mbytes) Download the Latest version of the GraphicUSB Application See This Month's Special Offer on Packet-Master USB480
Hardware Features
Software OverviewThe Packet-Master USB480 owes a large part of its functionality to the GraphicUSB application, which is supplied with the unit. A simple, yet information-rich display allows you to view every detail of a capture. This shows the organisation of the screen after a typical capture: |
Software Features
Download GraphicUSB and try it outThe downloadable package contains the full current release of GraphicUSB, together with some sample captures for you to examine. The sample files are in a folder: C:\Program Files\MQP Electronics\GraphicUSB\Samples This also demonstrates how you can view capture files in the absence of a Packet-Master USB480 Analyser. |
Mixed Speed on a Single Link
This view of part of a screen shot from Graphic USB shows a representation of data being transferred at two different speeds on the same link. Each packet is preceded by a coloured marker indicating High Speed, Full Speed or Low Speed. This makes the function of the PREAMBLE packet very clear, and shows precisely how split transactions work. Each event has a precise timestamp (left). Notice also the detailed timing information for Hub Setup time, End of Packet duration, and IDLE state time.
View
by Control Transfers
(less significant events filtered)
By clicking on the filter buttons for less significant event types, the sequence of top-level control transfer headers may be viewed in isolation. This ability to view information at an appropriate level of complexity makes Graphic USB an invaluable tool for getting straight to the heart of the matter. In this example we have chosen to display top-level transfer information plus bus state events.
Full Analysis and Data Panes
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By clicking on an event row in the event pane, a complete analysis of the event is displayed in the analysis pane, and the data content is shown in its entirety in the data pane. Where relevant, any information selected in the analysis pane is highlighted in the data pane for easy identification. All standard requests and descriptors are analysed in detail. Discrepencies are described. |
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Optional Class Analysis Modules
A number of Class Analysis Options are in preparation. The following are now available:
- Human Interface Devices (HID)
- Hub Class
- Communications Class
- Printer Class
- Mass Storage Class
- Audio Class
- Video Class (V1.0, V1.1)
- Vendor Class
Registering an option allows Graphic USB to display Class transfers in a more readable form.
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The screen shot to the left shows the analysis of a HID Report Descriptor. The shot below shows the results of the built-in 'HID Report Descriptor' parser. Each report defined by the Report Descriptor is identified and displayed.
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With the HID Class Analysis enabled, each HID report is identified, and the contents analysed. Examining the analysis of existing devices is an excellent way to learn how a class works, and it has never been easier to reveal the building blocks, than with Graphic USB. |
Test Set-up Connections
To achieve a good capture rate it is important to provide a suitable test environment. The Packet-Master USB480 should preferably be hosted by a good performance PC which must have a high speed USB connection. This USB host controller should not be shared by any other USB device while doing the testing.
It
is theoretically possible to use the same host computer
for the Packet-Master USB12 and for the Host Under Test.
We do not recommended this, but if it is absolutely unavoidable,
then you must at least use a separate USB host controller
for the device under test. If your computer does not have
two host controllers then you will need to buy a plug-in
USB host controller card.
Cables
As
this test equipment, by its very nature, has to connect
to a junction of two USB cables in order to probe the
data on the link, it is important to keep the cables between
the 'device under test' and the 'host under test' as short
as possible (for example 1m), and to use good quality
cables.
InstallationQuick and easy with self-installing software. System
Requirements
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| Weight: | 360 g |
| Dimensions: | 190 x 140 x 32 mm |
| Temperature: |
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| Humidity: | 20% - 80% non condensing |
Electrical Requirements
The Packet-Master USB480 normally derives its power from the Host computer's USB connection.
| Power: | 225mA
from USB host Optionally zero mA from USB if powered externally |
Safety
CE compliant.
Signals Available on Feature Connection
- D+
- D-
- RXVALID
- RXACTIVE
- 60MHz Clock
Standard Accessories
Packet-Master USB480 comes complete with the following:
- Graphic USB control software on CD
- USB 2.0 cable x 2
- Manual on CD
Optional Accessories
- Feature Connector Terminating Board
- External Power Supply
Software Options
- Individual Class Analysis Options
Availability
- Ex stock
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This range of test equipment is manufactured in England to the highest standards by MQP Electronics. Our distributors should have no difficulty in supplying you quickly with any item. Specifications of our products can be found on our Web Site www.mqp.com If you require further information, our sales office will be pleased to advise. Our phone number is +44 1666 825 666. |
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Download Packet-Master Product Data Sheet (PDF)
Download Packet-Master USB12 Manual (PDF) (390 Kbytes)