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User’s Manual    

 Wireless USB Adapte

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Page 1

 

Federal Communication Commission Interference Statement 

This equipment has been tested and found to comply with the limits for a Class B digital device,pursuant 
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful 
interference in a residential installation. This equipment generates uses and can radiate radio frequency 
energy and, if not installed and used in accordance with the instructions, may cause harmful 
interference to radio communications. However, there is no guarantee that interference will not occur in 
a particular installation. If this equipment does cause harmful interference to radio or television reception, 
which can be determined by turning the equipment off and on, the user is encouraged to try to correct 
the interference by one of the following measures: 
 
- Reorient or relocate the receiving antenna. 
- Increase the separation between the equipment and receiver. 
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. 
- Consult the dealer or an experienced radio/TV technician for help. 
 
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 
(1) This device may not cause harmful interference, and (2)  this device must accept any interference 
received, including interference that may cause undesired operation. 
 
FCC Caution: Any changes or modifications not expressly approved by the party  responsible for 
compliance could void the user's authority to operate this equipment. 
 
The device has been evaluated to meet general RF exposure requirement. The device can be used in 
portable exposure condition without RF striction. 
 
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. 
End user must follow the specific operating instructions for satisfying RF exposure compliance. This 
transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. 
 
The mobile device is designed to meet the requirements for exposure to radio waves established by the 
Federal Communications Commission (USA). These requirements set a SAR limit of 1.6 W/kg averaged 
over one gram of tissue. The highest SAR value reported under this standard during product certification 

for use when properly worn on the body is 0.62 W/kg

 

1. Introduction 

Thank you for purchasing the IEEE 802.11b/g or 802.11n Wireless USB Adapter. This 

Wireless Adapter is easy to use and easy to setup. If you have been tired of dealing with all 
those messy wires to connect a laptop or PC to office or home network, this Wireless adapter is 
an ideal access solution for wireless Internet connection.   

A typical Internet access application for the USB wireless adapter is shown as the following 

figure:   

Summary of Contents for WF53721CT

Page 1: ...54M 150M 300Mbps USB WIRELESS ADAPTER User s Manual Ver 2 3...

Page 2: ...vice must accept any interference received including interference that may cause undesired operation FCC Caution Any changes or modifications not expressly approved by the party responsible for compli...

Page 3: ...11b g or 150Mbps or 300Mbps 802 11n USB Wireless Adapter Adapter Installation disc User s Manual Antenna optional Warranty The warrants for the end user Customer that this hardware product will be fre...

Page 4: ...ver into one file Click to run the Driver Installation Notes Because Ralink often updates software the drivers contained in the disc might be changed without prior notice 3 Follow the instructions and...

Page 5: ...tility for setting up wireless connection If you select this item you can switch between the Windows XP s WZC service and the Ralink WLAN utility service later c Click the Install to confirm the insta...

Page 6: ...Although it might work when connecting with an USB hub the likelihood of configuration problems will be higher 2 The system shows a wireless utility icon in the Windows system tray which locates in th...

Page 7: ...get the information 3 If you don t see your network click Refresh network list in the upper left corner If you are locating within the valid range of hotspots or wireless routers all available network...

Page 8: ...he login page 1 After the installation of Ralink utility the system shows a special wireless utility icon in the Windows system tray which locates in the bottom right corner of your computer screen 2...

Page 9: ...re Ethernet connection or by 3G wireless connection Tips Point the cursor to the Ralink icon located on bottom right corner of your computer screen right click the mouse from the pop up list you can s...

Page 10: ...detects and displays the security settings of the network to which you are connecting in the Profile Settings screens If the Utility shows that WPA PSK or WPA2 PSK security is detected as shown below...

Page 11: ...For Windows 7 Notes Windows Zero Configuration WZC is not necessary in Windows Vista Windows 7 or higher version OS you can use WZC and the Ralink Utility to manage the adapter simultaneously 1 Click...

Page 12: ...button to connect to the selected network 3 If your network has wireless security configured enter the required settings The following is an example only your network settings may differ 4 The success...

Page 13: ...t AP of the adapter the adapter client mode with internal ICS sharing connect to other AP or router Internet This mode lets you use the adapter both as a Soft AP and client at the same time Switching...

Page 14: ...and need to be protected in order to be secure There are many security measures to safeguard wireless networks protect the data and keep unauthorized users out Hotspots on the other hand are often fr...

Page 15: ...Data Security WEP 64 128 WPA WPA2 802 1X Power Consumption It depends on different adapter models there are two typical values 330mA and 110mA in full Transmit TX 290mA and 95mA in full Receive RX Tra...

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