Dual Usb
Dual Usb
Check out this page if you are looking for Dual Usb
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 Numark MIXDECK EXPRESS DJ MixerDual CD USB Players  US $425.00
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 Numark CDN77USB Professional Dual USB and MP3 CD player US $309.95
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 Refurbished GEMINI CDMP 6000 Dual DJ Turntable CD MP3 USB Player US $299.99
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 GEMINI CDMP 6000 DUAL CD MP3 USB PLAYER TURNTABLE CDMP6000 US $399.00
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 GEMINI CDMP 6000 DUAL CD PLAYER MIXER2 USB STICKS US $369.00
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 Numark CDN77USB DJ Professional Dual USB MP3 CD Player US $329.95
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 New PWMA2003T 2000Watts Hybrid Pre Amplifier W AM FM Tuner USB Dual Wireless Mic US $167.99
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 Gemsound CMP500 Dual CD USB MP3 Player Mixer US $209.95
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 New PWMA3003T 3000Watts Hybrid Pre Amplifier W AM FM Tuner USB Dual Wireless Mic US $192.99
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 Gemini ITRAX BLK dual ipod 2 channel mixing station USB port US $129.95
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 NUMARK CDN77USB Professional Dual USB and MP3 CD player US $397.90
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 CORTEX HDC 1000 DJ DUAL USB MP3 PLAYER VMX1000USB PRO 7CH MIXER 2 SPEAKERS SUB US $877.75
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 BRAND NEW Numark MIXDECK EXPRESS DJ MixerDual CD USB Player US $419.99
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 Numark CDN77USB Pro Dual USB CD MP3 Player CDN77 US $392.88
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 Rane SL 4 for Serato Scratch Live Dual USB Interface US $899.00
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 CDMP 2700 Dual 2U CD USB SD player with Midi control US $699.95
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 Numark CDN77USB Dual USB and CD MP3 Player US $399.95
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 NUMARK CDN77USB Pro DJ Dual MP3 CD DUAL Player Rack Mount CDN 77 US $399.99
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 Gemini CDMP 6000 Dual CD MP3 USB Mixer Console New US $449.99
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 American Audio UCD 200 Dual CD MP3 Player with USB US $369.99
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 Pro DJ Dual USB MP3 SD USB Player w Scratch Function US $279.99
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 CDMP 6000 Dual CD MP3 USB Mixing Console US $417.41
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 Gemini CDMP 6000 Dual CD MP3 USB Mixing Console US $429.95
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 New Numark CDN77USB Professional Dual USB MP3 CD Player AUTHORIZED DEALER US $392.88
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 Gemini CDMP 6000 Dual CD MP3 USB DJ Mixing Console cdmp6000 Brand New US $449.00
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 New OXYGEN CDM 500CMT DJ DUAL CD MP3 USB W BUILT IN MIXER DEALER US $349.00
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 DJ Mixer Edison Scratch 2500 Professional Portable Dual CD USB MP3 Player Case US $595.00
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 Numark CDN77USB Professional Dual USB And MP3 CD Player New Authorized Dealer US $399.99
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 Numark CDN 77 USB Dual USB and MP3 CD Player MP3 Capable Dual CD Player New US $399.99
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 Numark CDN 77 USB Dual USB and MP3 CD Player MP3 Capable Dual CD Player US $394.74
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 Marathon Dual CD Mixer Sd USB Dig Fx MA DCM3000 US $451.23
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 NUMARK MIXDECK EXPRESS DJ CONTROLLER MIXER DUAL CD USB PLAYERS W VIRTUAL DJ LE US $429.99
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 AMERICAN AUDIO VELOCITY MP3 DUAL CD PLAYER VMX1000USB 7CH MIXER ODYSSEY GIG CASE US $775.75
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 GEMINI CDMP 6000 DUAL DJ MIXING CONSOLE USB MP3 $50 INSTANT OFF CLUB HOUSE DANCE US $449.99
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 CORTEX HDC 1000 DJ DUAL USB MP3 CONTROLLER 7CH VMX1000USB PRO MIXER FR1002 CASE US $592.75
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 New Pyle PDJ450U Professional DJ Dual USB MP3 SD USB Player w Scratch Function US $204.99
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 Gemini CDMP 2600 Dual CD MP3 USB Player 886830263576 US $277.46
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 GEMINI CDMP 2600 PRO DUAL CD MP3 USB PLAYER NEW US $369.95
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 Pyle Professional DJ Dual MP3 SD USB Player w Scratch US $195.14
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 Gemini CDMP 2600 CDMP2600 Professional Dual CD MP3 USB Player w VFD Display US $369.95
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 NEW Ion Portable Dual Power Turntable With USB US $128.85
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 New Gemini CDMP2700 Dual CD MP3 SD USB Touchscreen Media Player CDMP 2700 US $699.95
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 Gemini CDMP 2700 Dual CD MP3 SD USB Touchscreen Media Player CDMP2700 US $598.99
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 Gemini CDMP 2600 Dual CD MP3 USB Player US $336.65
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 New Numark CDN77USB Professional Dual USB And MP3 CD Player US $384.00
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 CORTEX HDC 1000 DJ DUAL USB MP3 Q SPAND PRO 4CH MIXER XTR 500 2 SPEAKERS SUB US $934.75
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 CORTEX HDC 1000 DJ DUAL USB MP3 PLAYER MM 1800 4CH MIXER 2 SPEAKERS SUBWOOFER US $829.75
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 NEW GEMINI CDMP 6000 DUAL CD MP3 USB PLAYER TURNTABLE US $359.00
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 American Audio Encore 2000 Dual CD MP3 USB Player US $468.69
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 American Audio Encore 2000 Dual CD MP3 USB Player New US $499.99
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Bridge Architecture: Revolutionizing Dual Mode 4G Cellular Modem Dongle Design
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In the continuous drive to keep consumers connected wherever they are, the cellular network has been an invaluable enabler. 3G and 4G connectivity, initially restricted to cellular phones, is now also widely available for portable computers. Initially a niche market for the business person on the move, cellular connectivity for laptops is currently experiencing an explosive growth due to college students and the new generation of latte sipping employees.
The device that enables cellular connectivity of laptop computers are known by a variety of names, including mobile broadband devices and laptop connect cards among others, depending on which carrier you talk to. As data revenues become increasingly larger in each carrier's revenue pie, so has the growth in popularity of Cellular Modem Dongles. Currently, every major cellular carrier offers a complete line up of such devices for sale. These modem dongles range from the simplest 3G connectivity to modems with additional features, like SD expandability to even dual mode modems.
The simplest 3G modem dongle available in the market today is the single mode GSM or CDMA modem dongle. These modem dongles offer only the capability to connect to the cellular network for data needs. These devices are dedicated data transmitting and receiving devices which mainly consist of an RF chip, a baseband modem, and a power management IC.
When it comes to dual mode modem dongles, a few possibilities come to mind. They are:
1. GSM + CDMA modem
2. 3G + 4G Cellular modem
3. Cellular modem + WiFi
GSM + CDMA
In most cellular markets today, there are a mix of standards. The two main cellular standards of GSM and CDMA might work for carriers by tying subscribers to limited networks. However, this usually limits consumers, especially in developing countries where different carriers have better coverage in their own locality. Thus, just like the rise of dual mode cell phones in such countries, dual mode modem dongles will experience the same growth.
3G + 4G Cellular
Another popular CMD design today is a combination of 3G and 4G modems. These designs leverage the high-profile 4G cellular data service and the more widely available 3G data service. With most carriers today either choosing WiMax or LTE as their preferred 4G implementation, modem dongles are starting to incorporate these into their design while supporting more prevalent 3G connectivity.
Cellular Modem + WiFi
A third design option is the cellular modem and WiFi dongle. Although WiFi might come standard on many laptop PCs today,the new 802.11n standard is not yet integrated into PCs. Furthermore, due to carrier specification, many carrier-linked netbooks will not have WiFi capability. This will create a need for an additional device capable of providing WiFi connectivity when available and yet still keep the carrier's data revenue stream intact.
USB performance
USB performance is another key factor in dual mode modem design. As USB is the predominant interconnect between the modem and PC, it is essential that the USB capability of the system operates at full capacity. After all, why have a modem that is capable of delivering more than 100Mbps of data if the USB capability of your system is limited to around 80Mbps?
This is another vital factor that put bridge chips in the forefront of these systems. Unlike a hub that just passes through the USB data coming from the modems, bridge chips can connect to other higher performance interfaces of the modems (for instance, the memory interface). This enables the modem to output the maximum data capable and not be gated by the integrated USB performance of the modem.Apart from satisfying the main requirements of a dual mode cellular modem dongle, bridge architectures also bring additional benefits to modem designs.They are:
1. Independent datapaths
2. Flexible interfaces
3. Size
Independent datapaths
This feature is useful for dual mode cellular modem dongles due to the tight power consumption restrictions. Given the 500mA power limitation, it is vital that the modems are able to constantly toggle different power modes to keep the system in balance.The possibility of independent datapaths allow for communication and data transfer to happen simultaneously without needing to store data in a queue. This enables the possibility of constant toggling without upsetting the system's fragile balance and interrupting data flow.
Flexible interfaces
Bridge chips also provide more flexible interfaces within a design, allowing developers to add an additional SD card or switch memory interfaces. This flexibility gives designers the freedom to readily swap features on their system while maintaining a fast time to market for their design.
Size
Many bridge chips are specifically designed for mobile devices. Their size is much smaller compared to hubs which are typically designed for computer peripherals. This is an added benefit to a mobile device like a USB modem dongle as size does matter. The smaller a CMD is, the easier it is to carry around.The availability of cost-effective and power-efficient dual modem dongles promises to meet the requirements of both consumers and carriers. Through the use of bridge architectures, developers can enable dongle to satisfy all the needed specifications of a dual mode cellular modem dongle while enabling additional enhancements and functionality.
About the Author
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Ming Hoong Chong, Product Marketing Engineer, Cypress Semiconductor Corp