Radio Shack 26 191 User Manual

4-Port USB  
OWNER’S MANUAL — Please read before using this equipment.  
Your RadioShack 4-Port USB Hub is a full-speed Universal Serial Bus  
(USB) hub. It supports one upstream and four downstream ports. With  
its 12 Mbps speed, the USB hub can consolidate a full range of low-  
speed and high-speed peripherals to provide desktop and notebook  
computer connectivity. It complies fully with the USB specification Rev  
1.1 and HID Class Definition Rev 1.0.  
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 or more of the following measures:  
• Reorient or relocate the receiving antenna.  
The USB hub is designed for use with an iMac or PC (with Windows  
98 or higher) that has a USB host controller installed on the computer.  
• 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.  
Tiered Star Topology — supports up to 127 physical devices.  
Connected devices can be of either low speed (1.5 Mbps) or full speed  
(12 Mbps).  
• Consult your local RadioShack store or an experienced radio/TV  
technician for help.  
Power Options — operates on its own power (with low-power  
consumption devices) or bus power.  
• If you cannot eliminate the interference, the FCC requires that you  
stop using your USB hub.  
Over-Current Protection — protects device connected to each  
downstream port when current exceeds 500 mA in self powered mode.  
Changes or modifications not expressly approved by RadioShack may  
cause interference and void the user’s authority to operate the  
equipment.  
Auto-Detect Speeds and Device Connections — let you use the  
USB hub with a wide array of devices.  
INSTALLATION  
Use the supplied 5-volt DC, 2.5-Amp AC adapter to power the USB  
hub.  
Bus Fault Detection and Recovery — overcurrent protection  
automatically turns power off in cases of excessive current. The USB  
hub is automatically reset when it recognizes an attached device or is  
prompted by a reconfiguration program.  
Cautions:  
System Requirements:  
You must use a Class 2 power source that supplies 5 volts DC  
and delivers at least 2.5 Amps. Its center tip must be set to  
positive and its plug must fit the USB hub's 5VDC 2.5A jack. The  
supplied adapter meets these specifications. Using an adapter  
that does not meet these specifications could damage the USB  
hub or the adapter.  
• Windows 98SE/ME/2000/XP or Mac OS 8.6 or higher  
• Pentium 233 MMX or higher PC or notebook, or Mac with one  
available USB port  
• At least 64 MB RAM  
• Always connect the AC adapter to the USB hub before you  
connect it to AC power. When you finish, disconnect the adapter  
from AC power before you disconnect it from the USB hub.  
FCC DECLARATION OF CONFORMITY  
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.  
1. Plug the supplied AC adapter's barrel plug into the 5VDC 2.5A jack  
on the rear of the USB hub.  
2. Plug the larger end of the AC adapter into a standard AC outlet.  
Product: 4-Port USB Hub  
Model: 26-191  
3. Plug the supplied USB cable's B-type connector into the HOST  
port on the rear of the USB hub.  
Responsible Party: RadioShack  
100 Throckmorton  
4. Plug the supplied USB cable's A-type connector into the PC's host  
port.  
Fort Worth, TX 76102  
Phone: 817-415-3200  
5. Connect up to four USB devices to the ports on the front of the  
USB hub. The green indicators on the USB’s front panel light if the  
corresponding USB ports are ready for use.  
THE FCC WANTS YOU TO KNOW  
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.  
Warnings:  
• If the AC adapter is disconnected from the AC outlet during  
operation or the USB device draws too much current or shorts, the  
affected port’s light goes out, and Windows sends you a “USB  
Hub Current Limit Exceeded” message. To reset the port, unplug  
the device from the affected port and click Reset on the error  
© 2001 RadioShack Corporation.  
All Rights Reserved.  
RadioShack and RadioShack.com are trademarks used by RadioShack Corporation.  

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