Details

Homepage | Versions |  Advantages/Disadvantages | How it Works  | Specifications | External Links

Versions

• PUB 1.0. Before first use it requires pairing. Schematic requires photodiode switch. 
• PUB 1.5  Does not require pairing. Photodiode switch eliminated. 
• PUB 2.0  Does not require pairing. New enclousre. Range boasted to 25-30ft. Battery life extended with additional AA cell. Click here for more info
• PUB 2.5  The battery enclosure can now be clipped off the photographer's hip or pocket. It features a connector that will pull apart under light force to reduce risk when pulled by accident.The rest of the design is the same as version 2.0.

 
Advantages/Disadvantages

• Small form factor and light weight relative to alternative solutions.
• Supports Rechargeable and Non-Rechargeable batteries.
• PUB 2.0 and 2.5 with 4 AA cells will deliver 5hrs to 7hrs or more.
• Within a 25-30 feet range, PUB2 can potentially can deliver 100Mbps data rate (faster than Bluetooth and 802.11a/b/g, which makes it better suitable for taking photo in a studio scenario).

• Does not have as much range as 802.11a/b/g.
• Does not have the integrated look, such as the Canon WFT-series as shown in this article.

How it Works with a Camera

For tethered shooting with a DSLR camera: it works as if a USB cable is connected between your DSLR camera and your computer.  However, instead of transferring the data over electrical signals over the wire, the data is modulated and transported over a wireless signal. When the wireless signal is received, it is demodulated and converted back to the standard USB signal. Thus, this manipulation of the signal is masked to both the computer and the camera.

The differences between making an connection with a cable versus PUB (ver 1.5, 2.0, and 2.5) are:

1. Software must be installed to manage wireless USB connection
2. Data rate is limited by the signal strength between the two dongles. Typically,  the further the distance between the two dongles, then the lower the data rate

Specifications

• USB 2.0 devices(printers, etc.) into a wireless device
• Windows XP, Vista, Windows 7. 
• Does not support: Apple/Mac OSX 
• Does not support: isochronous data transfer, such as webcams, speakers, and/or microphones  
• The original kit is UWB Radio Compliance: US/FCC, Europe/CE, Japan radio law, Korea/MIC
• WiMedia standards based on Certified Wireless USB, WiMedia PHY and MAC specifications
• 128-bit AES security
• Operates on WiMedia band group 1. This spectrum is from 3.168 to 4.752 GHz 
• Output power: 41.3 dBm/MHz
• 3AA Alkaline batteries will last about 4.5hrs to 6hrs+  (5 hrs to 7 hrs + with PUB2 and 4 AA cells)

External Links
 
General USB in formation:
http://en.wikipedia.org/wiki/USB

Information on Wireless USB and UWB:
http://en.wikipedia.org/wiki/Wireless_USB

More information about the Cables Unlimited dongle:
http://www.cablesunlimited.com/products/Prod_Individual3.aspx?groupcode=I4098