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Where can I get JEM's product information?
All available online datasheet are provided in PDF format which requires that you have Adobe Acrobat Reader from Adobe installed on your computer. You may find a list of download links from the following URL:http://www.jem.com.tw/Supports/download.html
 
If it is not sufficient for you, please try to contact our sales representative or e-mail to sales@jem.com.tw
 
Product Information
What is HDMI?
What is the main specification of HDMI connector and cable?
What does "NAS" stand for?
What does "eSATA" stand for?
What is Skype?
What is "Windows Easy Transfer"?
What is "DisplayPort"?
What is HDMI?
The High-Definition Multimedia Interface (HDMI) is a compact audio/video connector interface for transmitting uncompressed digital streams. It represents a digital alternative to consumer analog standards such as RF coaxial cable, composite video, S-Video, SCART, component video, D-Terminal, and VGA. HDMI connects digital audio/video sources such as set-top boxes, Blu-ray disc players, personal computers, video game consoles, and camcorder to compatible digital audio display, projector and computer monitors. HDMI products started shipping in autumn 2003 and have adopted by many branding manufacturers driven the consumer electronics market.
What is the main specification of HDMI connector and cable?
The HDMI specification defines the protocols, signals, electrical interfaces, and mechanical requirements of the standard.

For Connectors: There are three types HDMI connector - Type A, Type B and Type C. The Type A connector has 19 pins with bandwidth to support all current HDTV models and was the most popular type in the market. The plug's outside dimensions are 13.9 mm wide by 4.45 mm high. The Type B connector has 29 pins (21.2 mm by 4.45 mm) and can carry double the video bandwidth of Type A for use with very high-resolution future displays. Type B is not currently used in any CE products yet. The Type C mini-connector is intended for portable devices. It is smaller than the Type A connector (10.42 mm by 2.42 mm) but has the same 19 pin configuration. It can be connected to a Type A connector using a Type A-to-Type C connector cable.

For Cables: The HDMI cable can be used to carry video, audio, and device- controlling signals (CEC). The HDMI specification does not define a maximum cable length. The length of the HDMI cable was depends on the construction quality and materials that were used. The signal attenuation and intersymbol interference which is caused by long cables can be compensated by using adaptive equalization. HDMI 1.3 has defined two categories of cables: Category 1 certified cables which have been tested at 74.5 MHz and Category 2 certified cables which have been tested at 340 MHz to reduce the confusion about which cables support which video formats. Category 1 and 2 cables can either meet the required parameter specifications for inter-pair skew, far-end crosstalk, attenuation, and differential impedance or they can meet the required non-equalized/equalized eye diagram requirements. A cheaply made cable of 5 meters can be manufactured to Category 1 specifications using 28 AWG conductors while better quality using 24 AWG conductors and better constructive materials. HDMI cables are often more expensive than traditional video cables at retail stores. However, many retailers offer un- certified HDMI cables at lower prices without any quality assurance.

HDMI devices are manufactured to adhere to various versions of the specification, where each version is given a number such as 1.0, 1.2, or 1.3a. Each version of the specification uses the same kind of cable but increases the bandwidth or capabilities. A product listed as having an HDMI version does not necessarily mean that it will have all of the features that are listed for that version since some HDMI features are optional such as Deep Color and xvYCC. The lastes version of HDMI is HDMI 1.3, which released at June 22, 2006. It increases single-link bandwidth to 340 MHz (10.2 Gbit/s) and optionally supports Deep Color with 30- bit, 36-bit, and 48-bit xvYCC, sRGB, or YCbCr compared to 24- bit sRGB or YCbCr in previous HDMI versions. Cable Categories 1 and 2 were also defined.
ATC certified HDMI cables and HDMI switch were available in JEM. For more information, please see here.
What does "NAS" stand for?
"NAS" is the acronym of Network-attached storage, which is file-level computer data storage connected to a computer network. It can provide data access to heterogeneous network clients.
What does "eSATA" stand for?
"eSATA" - "external SATA" is a version of SATA meant for external connectivity. It has revised electrical requirements of SATA in addition to incompatible cables and connectors. Identical protocol and logical signaling, allowing native SATA devices to be deployed in external enclosures with minimal modification. The maximum cable length is for 2 meters.

The external cable connector is a shielded version of the connector specified in SATA 1.0a with these basic differences: The external connector has no "L" shaped key, and the guide features are vertically offset and reduced in size. This prevents the use of unshielded internal cables in external applications and vice- versa. To prevent ESD damage, the insertion depth is increased from 5 mm to 6.6 mm and the contacts are mounted farther back in both the receptacle and plug. To provide EMI protection and meet FCC and CE emission requirements, the cable has an extra layer of shielding, and the connectors have metal contact points. There are springs as retention features built into the connector shield on both the top and bottom surfaces. The external connector and cable are designed for over 5,000 insertions and removals while the internal connector is only specified to withstand 50 times.

SATA and eSATA connectors aimed at the consumer market, eSATA enters an external storage market already served by the USB and FireWire interfaces. Most external hard disk drive cases with FireWire or USB interfaces use either PATA or SATA drives and "bridges" to translate between the drives and enclosure. And this bridging incurs some inefficiency, Some single disks can transfer almost 120 MB/s during real use, more than twice the maximum transfer rate of USB 2.0 or FireWire 400 (IEEE 1394a) and well in excess of the maximum transfer rate of FireWire 800, though the FireWire 1394b spec reaches ~400 MB/s (3.2Gbit/s). Finally, some low-level drive features, such as S.M.A.R.T., may not be available through USB or FireWire bridging. eSATA does not suffer from these issues.

There were a number of products designed for external connections of SATA drives. Some of these use the internal SATA connector or even connectors designed for other interface specifications, such as FireWire. These products are not eSATA compliant. The final eSATA specification features a specific connector designed for rough handling, similar to the regular SATA connector, but with reinforcements in both the male and female sides, inspired by the USB connector. It's harder to unplug, and can withstand yanking or wiggling which would break a male SATA connector (the hard drive or host adapter, usually fitted inside the computer). With an eSATA connector considerably more force is needed to damage the connector, and if it does break it is likely to be the female side, on the cable itself, which is relatively easy to replace.
What is Skype?
Skype is software that allows users to make telephone calls over the Internet. Calls to other users of the service are free, while calls to other landlines and mobile phones can be made for a fee. Additional features include instant messaging, file transfer and video conferencing. Skype uses a proprietary Internet telephony (VoIP) network. The protocol has not been made publicly available by Skype and official applications using the protocol are proprietary and closed-source. The main difference between Skype and regular VoIP clients is that Skype operates on a peer- to-peer model rather than the more usual client-server model.

Skype has experienced rapid growth in popular usage since the launch of its services. It was reported more than 12,500,000 concurrent Skype users were online.
What is "Windows Easy Transfer"?
Windows Easy Transfer is a built-in function in Windows Vista OS which helps users to move files and settings stored on their computers running Windows 2000, Windows XP to a new computer running Windows Vista. It uses the Files and Settings Transfer Wizard included in Windows XP. The application is downloadable for Windows XP or Windows 2000. There are several methods that can be used: 1. Using a proprietary USB-to-USB bridge cable made by JEM called the Easy Transfer Cable. 2. Using CD/DVD, a USB flash drive or an external hard disk drive. 3. Over a wired or wireless network or using an Ethernet crossover cable. Basically Easy Transfer Cable will be the most efficient method for Windows Easy Transfer Cable. For detail information, please see here.
What is "DisplayPort"?
DisplayPort is a digital display interface standard defined by Video Electronics Standards Association (VESA). It covers a new license, royalty-free, digital audio/video interconnect, intended to be used primarily between a computer and its display monitor, or a computer and a home-theater system.

The DisplayPort connector supports 1, 2, or 4 data pairs that also carries audio and clock signals, each with a symbol rate of 1.62 or 2.7 Gbit/s.The video signal is not compatible with DVI or HDMI, but a DisplayPort connector can pass these signals through. While DVI and HDMI require separate clock signals, DisplayPort embeds the clock in the data signal. The data transmission protocol in DisplayPort is based on micro packets and is extensible for future feature additions, whereas DVI/HDMI transmission protocol is a Serial Data Stream at 10x pixel clock rate. DisplayPort currently supports a maximum of 8.64 Gbit/s data rate and 25601600 resolution over a 3 meter cable.
 
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