The other analog path in a medical ultrasound front end is for CW Doppler. This path needs greater SNR than the 110 dB that the B-mode and PW-Doppler paths provide. “Bear in mind that the transmission signal is continuous and is also being received,” says Samplify’s Evans. “You can also imagine that the refection from a blood vessel wall would be far larger than the Doppler scattering of the blood carried inside the vein. In the CW Doppler, you are trying to maintain a dynamic range of 154 dBm [decibels referenced to milliwatts]/Hz. The thermal noise floor of 50Ω is –174 dBm/Hz.”
Because the CW-Doppler technique does not use pulses, you cannot disregard the large signals by blanking them out or attenuating them for a certain time. Instead, the technology picks off the ultrasound signal after the low-noise-amp section and sends them to a demodulator section that performs analog-signal processing. Doppler signals represent changes in phase, so the I and Q demodulation that advanced-communications techniques use is also applicable to mixing down the 2-MHz CW signal to baseband. This demodulation allows the system to discriminate between blood flow toward the sensor and blood flow away from the sensor. The I and Q components then go to a higher-resolution, slower-sampling ADC. Demodulation has moved down the signal from the frequency of the transmitting pulse to the frequency of blood flow in your veins. Suitable ADCs are 16- or 18-bit devices sampling at 150k or 100k samples/sec, respectively. The I and Q components then move to the spectral-processing subsection in the beam-former FPGA.
Integration trade-offs
A fundamental choice you will have to make in building an ultrasound system is how much integration to use. Analog Devices this year won an EDN Innovation Award for its latest ultrasound front end (Reference 4). The company’s eight-channel AD9276 includes the low-noise amp, the PGA, antialiasing filters, and an ADC—all on one CMOS-silicon die. Leveraging Analog Devices’ expertise in communications, the part also integrates the I and Q demodulators. To make an analog front end, you would need to add only the transmitting functions, the input switches, and the amplifiers and ADCs for the CW-Doppler function. Texas Instruments’ AFE5804 analog front end integrates the amplifiers and ADC in one package but uses a low-noise amp and VGA on a silicon-germanium process and mounts it as a separate die into the same package as the CMOS ADC (Figure 4). The company also offers the AFE5851, which integrates the VGA and ADC but omits the low-noise amplifier, so you can use an external part.
“Customers want in the long term to put the electronics into the transducer,” says Veronica Marques, strategic-marketing manager for the medical-business unit at Texas Instruments. “If customers want to integrate the low-noise amp into the transducer, they can still use a TI integrated analog front end,” she says. Choosing the integrated front end locks you into one vendor, making it impossible to upgrade separate blocks, such as the PGA or the VGA.
Maxim, on the other hand, offers high-performance, silicon-germanium, low-noise amps and then lets you choose PGAs and ADCs from the company or from a competitor. The MAX2038 integrates an amplifier with the quadrature mixer. The MAX2078 integrates the amplifier, VGA, filters, and CW-Doppler mixers across eight channels. If you want to differentiate your product by its software or user interface, using an integrated analog front end makes sense, especially if your design has space and power constraints. SonoSite, on the other hand, uses a proprietary analog front end because the results of the cost and design time show up in the displayed images. All of the company’s analog front ends are custom-designed. “The chip makers are interested in leveraging our technologies,” says the company’s
Another integration factor involves the digital-data side of the front end. Samplify Systems, for example, which also this year won an EDN Innovation Award, does not integrate the low-noise amp and PGA into the ADC converter because high-voltage or low-noise processes are better suited to those blocks (Reference 5). Samplify’s Evans notes that a low-power, 12-bit,
Other factors you should consider when using integrated chips are their availability and their obsolescence. Due to the fine-line CMOS content in a multichannel ADC system, many of the analog-semiconductor vendors farm the fabrication out to TSMC (Taiwan Semiconductor Manufacturing Co), UMC (United Microelectronics Corp), or other large digital-CMOS-fab vendors. This approach reduces your chances of ending up on an allocation list when the boom in semiconductor demand inevitably comes. Equally concerning is obsolescence. It is not beneficial to design in a proprietary chip for cost, space, and power considerations if the vendor plans to stop producing the chip. Semiconductor vendors know that the medical-device market differs from the consumer-electronics market. Customers for medical devices must get FDA (Food and Drug Administration) approvals and expect chip runtimes of a decade or more. Although it is more difficult to win a medical-ultrasound socket, once a company gets that socket, the part can flourish for years. Even in a recession, people still become sick. Therefore, all the analog-semiconductor companies keep their proprietary chips in production for as long as customers need them.
Remember that the architecture of an ultrasound system involves an analog trade-off (Figure 5). You must decide whether CW-Doppler capability is important, given that it requires so many dedicated analog circuits. You must weigh multiplexing 16 channels into 64 against the performance this approach will yield. You must trade off silicon germanium versus CMOS, quartz versus MEMS, and DSPs versus FPGAs. Design cycles have decreased from five years to less than two years. A product that finds use in aircraft in a battlefield will need approvals from the FDA, Federal Communications Commission, CE (Conformité Européenne), FAA (Federal Aviation Administration), and Department of Defense. You may have to design systems that work in a decompression chamber to evaluate Navy SEAL (sea/air/land) special forces or Air Force personnel at altitudes of 30,000 feet.
You can understand why engineers devote their entire careers to designing analog front ends for medical-ultrasound systems. “There are a lot of people that get into it and then get addicted to it,” says SonoSite’s
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
Coaxial Cables and Connectors Make Vital System Links
Micro-Coax characterizes its coaxial cables by means of extensive test data, including information on the capacitance per foot of its different UtiFLEX flexible cables. Its model UFA
W.L. Gore has developed cables for use with a vector network analyzer (VNA) and cables capable of operating through 110 GHz. The firm’s PHASEFLEX microwave test cable assemblies are designed for minimal changes in signal phase from DC to 67 GHz. The flexible cables allow for a minimum bend radius of
Gore also offers PHASEFLEX cable assemblies with 1-mm coaxial connectors for use to 110 GHz. The typical insertion loss is 1.34 dB for a 10-cm section and 2.67 dB for a 20-cm section, both with VSWR of 1.50:1.
Electronic Assembly Manufacturing, Inc. (www.eamcableassemblies.com) recently announced the availability of low-loss flexible cable assemblies for applications to 18 GHz. The cables have 0.335-in. diameter and exhibit insertion loss of just 0.048 dB/ft. at 1 GHz and 0.22 dB/ft. at 18 GHz. The cable assemblies can handle 1800 W CW input power at 1 GHz and 600 W CW input power at 10 GHz. They offer SE of better than 95 dB. EAM’s low-loss cable assemblies feature a minimum bend radius of
SSI Cable Corp. creates its Stainless Steel Advantage coaxial cable assemblies using stainlesssteel- jacketed coaxial cable with welded cable/connector interfaces for applications requiring the highest reliability albeit with limited flexibility. The cable assemblies employ a stainless-steel jacket over a thin copper outer conductor, providing excellent SE performance with high corrosion resistance. A copper outer conductor is used for optimum conductivity. The cables are available with outside diameters of 0.093, 0.145, and
EZ Form Cable Corp. produces the EZFlex 141 handformable cable as a compromise between the high performance of semi-rigid cables and the versatility of flexible cables. It is a 0.141-in.-diameter coaxial cable with silver-plated, copper-clad steel center conductor, solid PTFE dielectric, and tin-plated copper braid. It uses a silverplated copper-clad steel wire inner conductor and 0.117-in. nominal diameter solid PTFE dielectric and weighs
A number of firms offer coaxial cable assemblies for use with vector network analyzers (VNAs) and other microwave test equipment, including Mini-Circuits, MegaPhase, Pasternack Enterprises, Micro-Coax, Teledyne Storm Products, Agilent Technologies, and Anritsu. For example, Huber + Suhner, a leading provider of both RF/microwave and optical cables, has developed the SUCOFLEX 307 and RG393 cables for RF power measurements. Designed to handle high power levels with low insertion loss and high stability, the firm supports the cables with power terminations for use at power levels to 100 W and frequencies to 6 GHz and attenuations for use at power levels to 300 W and frequencies to 6 GHz. Florida RF Labs offers its Lab-Flex line of high-reliability flexible coaxial cable assemblies for measurement applications. Available with diameters from 0.135 to
Although connectors would appear to be fairly mundane, enhancements occur on a regular basis to improve reliability or electrical performance. For example, last year Tyco Electronics announced a snap-lock SMA connector designed to mate with standard SMA connectors for simple, reliable links. Suitable for use through 6 GHz, the connector’s inner fingers slide over the threads of a conventional SMA connector and lock into place by engaging the other connector’s outer collar. The connector pair can be disengaged by pulling back on the snap-lock connector’s outer collar, making them ideal for measurement applications. The snap-lock SMA connectors are available in a variety of configurations, including in straight and right-angle forms.
Radiall grew its QMA line of connectors with the addition of high-density waterproof QMA (WQMA) connectors with snapon Quick-Lock technology. They are rated at 200 W power at 1 GHz and temperatures from -40 to +105ºC as well as for at least 100 mating cycles The RoHS-compliant connectors feature enhanced corrosion resistance to weather hostile environments.
RF Connectors, a division of RF Industries, supplies a wide variety of coaxial connectors, including 1- , 2.9-, and 3.5-mm connectors, 7/16 connectors, BNC, Type N, SMA, and TNC connectors. Another division of RF Industries, Aviel Electronics (www.avielelectronics.com), has improved the SMB connector by adding a push-lock feature to the standard MILSTD- 348 snap-on coupling mechanism increasing the disengagement force to at least
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
Diagnostic ultrasound gets smaller, faster, and more useful
After passing through the low-noise amplifier, the signal splits off between a CW-Doppler path and a B-mode path and conventional color-Doppler path. The conventional path starts with a PGA (programmable-gain amplifier) that typically adds 40 dB of gain. The PGA varies dynamically as it receives each pulse; thus, the signals that reflect from deeper in the body receive more gain. This approach allows a channel SNR of 110 dB and extends the effective 70-dB dynamic range of a 12-bit ADC. As with a low-noise amp, bandwidths for PGAs are approximately 20 MHz. One vital characteristic of PGAs is recovery from overload. You can expect hard tissue or bone to reflect a large signal that overloads the PGA. The system can sense this signal and reduce the gain at that point in the receiving time, but the faster the PGA recovers from overload, the sooner the system will have accurate information to process. Overload can also create frequency modulations that are indistinguishable from blood flow in a Doppler system.
Amplifier and ADC vendors measure overload recovery differently, and even ADC vendors differ among themselves in how they evaluate overload recovery. This measurement is not so much about specmanship but about the probabilistic nature of the overload regimens the system must undergo. “You have to work with customers carefully and closely to translate what is a system phenomenon of overload into a spec for a part,” says Scott Pavlik, a marketing manager in the health-care segment at Analog Devices.
An antialiasing SAW (surface-acoustic-wave) or a passive filter follows the PGA. Although the 20-MHz bandwidth is high for active filters, amplifiers are continuously pushing this boundary. It is common for the ultrasound ADC to operate at
The analog signal ends at the ADC, which is typically a 12-bit,
Ultrasound systems can alternatively use CTSD (continuous-time-sigma-delta) converters, which are available from National Semiconductor and Analog Devices. Systems using this topology have low power consumption for their speed and SNR. CTSD converters also require no antialiasing filter in front of the converter because the loop filters in the converters inherently prevent aliasing. With CTSD converters, the internal loop amplifiers control the bandwidth, so you cannot undersample them. As a result, a
Because dozens of channels of 12-bit data would use up all of the pins on even the largest FPGA, the converters use serial outputs, such as LVDS (low-voltage-differential signaling). Parts that have eight ADC channels in one package and multiple channels on one pair of differential outputs further reduce the pin count in beam-former FPGAs. Be aware that SNR specs can be deceiving. “An ADC can have very poor near-carrier SNR and still having excellent full-Nyquist-band SNR specifications,” says Maxim’s Scampini, who also warns that flicker noise in the ADC reference can cause poor near-carrier SNR.
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
Selecting the right RF coaxial connector and coaxial cable
The vast variety of RF coaxial connectors and cable available often makes it a difficult task for an engineer to specify or select the correct part for a particular application.
Often, not much thought is given to essential factors and components, and this can be devastating to the performance of the system. RF systems comprise a number of items eg, antennas, attenuators, amplifiers, couplers, power meters, RF generators, etc, and it is not uncommon for much thought to go into the high-tech devices while RF coaxial cable connectors and cable are often treated as an afterthought.
RF coaxial connectors and cable provide a vital link within the communications, EMC testing, commercial and military, and not to mention the measurement fields. Although there are a variety of RF coaxial connectors, they are characterised by a few key parameters. The most obvious factor is the size, followed by power handling and frequency range. To ensure maximum power transfer, the impedance of the connector should match the source load. These characteristics, along with connector durability and cost, must be considered in light of the specific application. This article offers suggestions and insight into selecting the best connector and cable system for a project.
Intermodulation in RF coaxial connectors
The increased demand from the mobile communication industry to provide greater channel capacity, coupled with increased sensitivity of receivers, has exposed a condition within RF coaxial connectors referred to as intermodulation distortion. Intermodulation products are generated when two or more frequencies are applied to a non-linear transmission element. A non-linear device is produced when the signal applied does not have a proportional ratio between current and voltage at the same time.
These mixed frequencies can cause disruption in communication systems or measuring equipment if several carrier frequencies with a high intensity have the same transmission path as weak receiving signals ie, mobile phones. The occurrence of intermodulation in passive components is caused by very small non-linearities of the conducting parts. The affected elements include connectors, cables, filters and antennas.
The reasons for non-linearity in passive devices are unsuitable contact geometry, use of magnetic materials (ie, steel, nickel), contaminated or oxidised contacts, dissimilar contact base materials and microscopic field discharging effects.
Potential causes of intermodulation within RF coaxial connectors include:
* Contaminated plating solution.
* Insufficient plating thickness.
* Corrosion.
* Dissimilar metals in intimate contact.
* Magnetic materials in the signal path.
* Low contact pressure.
* Less than 360° contact.
* Poor surface finish.
* Debris and dust within the connector.
* Convoluted signal path.
The presence of any of the above elements within a system will negatively impact the performance of the entire system. For this reason, all components in a transmission path must be selected to suit the system requirements. It is therefore recommended for critical applications that the largest conducting surface possible is chosen to avoid high current densities. The connector selected must provide for a defined mechanical stop of the outer conductor. The use of a threaded coupling interface ensures that the interface is correctly engaged and for this reason the 7/16 and N ranges are preferred due to their increased power capabilities and particular suitability for low intermodulation applications. TNC, 4.1/9.5 and SMA type interfaces could also be considered.
To ensure the long-term electrical and mechanical stability of the assembly, it is essential that this operation is carried out correctly. coaxial Cable or panel mount connectors should have a full 360° electrical contact to the outer conductor – the solder/clamp termination method is preferred, since it offers improved intermodulation stability over the crimp termination variants. A crimp, by its nature, can only provide a multiple-point contact (rather than 360° contact) and also causes variability in the positioning of the electrical contact during dynamic testing.
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
coaxial Cable series come and go so quickly
-- The competition continues on "American Idol" (8 p.m., Fox, TV-PG). Ellen is quickly wearing out the word "adorable."
-- A street racer's death reveals a military connection on "NCIS:
-- McKinley makes the sectionals on "Glee" (9 p.m., Fox, r, TV-14,D,L).
-- The focus shifts to Ben on "Lost" (9 p.m., ABC, TV-14).
-- Peter plans his next step on "The Good Wife" (10 p.m., CBS, TV-14).
-- Amnesia alert! A beating victim awakens from a coma with no memory about his background on "The Forgotten" (10 p.m., ABC, TV-14).
-- Max's parents continue to reel from his diagnosis on "Parenthood" (10 p.m., NBC, TV-14).
-- A triple homicide invites a number of approaches on "Southland" (10 p.m., TNT, TV-MA).
CULT CHOICE
Samurai warriors fight to save a nobleman's daughter in the 1958 adventure "The Hidden Fortress" (12:
SERIES NOTES
A marine takes a bullet on "NCIS" (8 p.m., CBS, TV-PG,V) ... Couples compete on "Biggest Loser" (8 p.m., NBC, TV-PG) ... An annotated version of last week's "Lost" (8 p.m., ABC, r, TV-14) ... A memorable first kiss on "90210" (8 p.m., CW, TV-14,L,V ... Amanda's beau (Billy Campbell) visits on "Melrose Place" (9 p.m., CW, TV-14,S).
LATE NIGHT
Freddie Prinze Jr. and Steve Austin appear on "Lopez Tonight" (11 p.m., TBS) ... Annie Leonard chats on "The Colbert Report" (11:30 p.m., Comedy Central) ... Julianna Margulies and Broken Bells are scheduled on "Late Show with David Letterman" (11:35 p.m., CBS) ... Jay Leno welcomes Christoph Waltz, Dave Salmoni and Joan Jett and the Blackhearts on "The Tonight Show" (11:35 p.m., NBC) ... Gabourey Sidibe and Gary Allan appear on "Jimmy Kimmel Live" (12:
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
Medford residents clamor for coaxial cable competition
Coaxial Cables and Connectors Make Vital System Links
By Alix Roy
FiOS is fast, according to Verizon, but it hasn't managed to reach residents in
“We're getting inundated, slaughtered is the right word, with letters asking us about why we can't have FiOS,” said Ctiy Councillor Robert Penta. “We're at the point where it's like we're the only ones [without it,]”
Some residents have pointed a finger at Mayor Michael McGlynn, who awarded Comcast a 10-year contract in 2005 but has since failed to reach a deal with Verizon, despite numerous meetings. On Wednesday, McGlynn said the two parties were on the verge of an agreement but it fell through when the economy faltered.
“They notified us that they were stopping negotiations, that they were in the process of laying off 8,000 employees,” the mayor said. “I've been trying ever since, to try and get them back here.”
The notification came last fall, after the two parties had swapped proposals, McGlynn said. The city had already hired attorney Peter Esptein to help finalize the deal and Verizon had begun wiring the streets.
“They came in with an army of trucks and then bang, it just shut down,” McGlynn said.
Verizon spokesman Phil Santoro confirmed that the company had engaged in several conversations with McGlynn and begun preliminary work to prepare the city for FiOS before pausing negotiations. Last week, he said the company has halted expansion plans across the state in order to focus on fulfilling its current contractual obligations.
“Before we expand to any new communities, we are going to completely build out the 105 we already have,” he said.
Verizon is required to offer services to all households in a community within 4-5 years of signing a contract, Santoro said. While a vast majority of homes are connected within the first year of service, 20-30 percent - often homes that are not served by overhead poles and wires – take longer.
FiOS is currently offered in neighboring
McGlynn said he was at the forefront of the push for cable competition when he partnered with several adjacent towns five years ago to negotiate a deal with RCN. After talks began, the company filed for bankruptcy protection, and he turned his attention to Verizon while renewing the city's contract with Comcast.
While it has slowed its residential expansion, RCN serves 65,000 cable TV customers in
At a City Council meeting last month, which was attended by Comcast representatives, councillors passed a resolution seeking to grant the board partial authority over decisions related to city contracts with cable providers. The resolution, proposed by Penta, asks that state laws be changed so that all cable contracts awarded by the mayor be subject to the council's approval.
Penta said the resolution was not intended to usurp the Mayor's authority over cable contracts but to ensure that all of the city's service options are explored. Like most residents, he supports bringing alternative cable providers to the city.
“The ratepayers don't even have a choice," he said. "They're just stuck with whatever is out there.”
Medford resident Joseph Viglione, a producer at numerous cable access channels in surrounding towns, said he is outraged at the lack of choice for Medford citizens who purchase cable and high-speed Internet.
“This lack of competition is reflected in high rates, limited selection, delayed access to new features, and less funding for ... access television,” he wrote in a letter to McGlynn.
Viglione urged the mayor to appoint a cable commission comprised of residents with knowledge on the topic to reopen negotiations with Verizon. The city's cable commission last met in 2005 but is no longer listed on the city website as an operating body. McGlynn said Wednesday that the commission would reconvene if talks with Verizon progressed.
“It's not disbanded,” he said. “There's no contract right now that's being reviewed.”
If negotiations do resume, McGlynn said the city would hold public hearings once a contract is near completion. He said the council's resolution to share authority over contract approval was contrary to the city charter, which names the mayor as the issuing authority.
“I do not support that,” he said of the resolution.
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
The Record: Who should pay in cable-network war
Coaxial Cables and Connectors Make Vital System Links
The Record: Who should pay in cable-network war
Who should pay in
cable-network war?
Long ago in a galaxy far, far away, there was a thing called network TV that was broadcast for free, over the airwaves and subject to government regulations. Any household could receive these signals, provided that it had a rooftop antenna or tabletop rabbit ears.
The reception of these airwave signals, however, was greatly dependent on local geography. Beaming these "broadcasts" from the top of the
Then came cable. This new technology offered the ability to "capture" airwave broadcasts and then retransmit them via coaxial cable to viewers who would otherwise be out of range. It was a boon to viewers in the region's more remote counties.
Along with the technology came the advent of pay TV, whereby viewers could purchase programs that were exclusively provided via cable and not available as "free" TV.
Now, Cablevision has a situation over the broadcast rights of ABC's offerings. As long as the cable companies charge only a nominal fee for the technology of a clearer signal, networks should have no claim at all to receive payment for these signals. On the contrary, perhaps the networks should be required to pay the cable companies for the benefits they derive in having their programs, and advertisers, reach a wider audience.
Peter V. Marchesani
ÿ
The "Inglourious Basterds" at ABC who attempted to extort Cablevision at the expense of "Precious" viewers should make immediate plans so Cablevision can rebroadcast "The Academy Awards" in its entirety next Sunday.
Many viewers got hit from "The Blind Side" because a contract dispute prevented the show from being broadcast at its scheduled 8 p.m. time. I'm sure many viewers simply switched channels and didn't come back. As for my family, we turned the TV off at 8:40 p.m.
Now I read in the newspaper this morning that the program came on at 8:45 p.m. Unfortunately, my "Avatar" wasn't tuned in, either.
Chuck Bins
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
XipLink — Throughput Treat For Cable & Wireless
Coaxial Cables and Connectors Make Vital System Links
]]>
XipLink has been selected by Cable and Wireless Communications for the deployment of XipLink XA appliances into various networks at remote islands of the
Integrated web optimizations help insure snappy responses to residents and business of the islands. When combining these features, throughput over the network more than doubled. XipLink’s XA-Series appliances include a range of industrial computing engines that scale for wireless carriers from 2 Mbps to high-performance systems running at 155 Mbps, with the best capital cost ratio in the industry. For mobile users, XipLink also offers the XS family of specialty devices, including the palm-sized XipStick™ for MSS and mobile military VSAT requirements, as well as the XS-104 single board computer for PC-104 rugged computing on the move.
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
AsiaInfo Acquires 80% Stake in Hangzhou Zhongbo to Enter China's Cable Market
Coaxial Cables and Connectors Make Vital System Links
BEIJING and SANTA CLARA, Calif., April 5 /PRNewswire-Asia-FirstCall/ -- AsiaInfo Holdings, Inc. (Nasdaq: ASIA) ("AsiaInfo"), a leading provider of telecom software solutions and IT security products and services in China, today announced that its wholly-owned subsidiary AsiaInfo Technologies (Chengdu), Inc. has signed a definitive agreement to acquire a majority ownership stake in Hangzhou Zhongbo Software Technology Co. Limited ("Hangzhou Zhongbo"), a provider of software and IT solutions for the cable industry in China.
Pursuant to the Purchase Agreement, AsiaInfo will hold an 80% ownership stake in Hangzhou Zhongbo. Hangzhou Zhongbo provides IT solutions such as Business Support Systems ("BSS"), Digital Television Operation Support Systems ("DTV OSS") and Customer Relationship Management ("CRM") systems for coaxial cable operators in
"We are excited to announce this strategic acquisition marking the first step of our expansion into the cable industry," stated AsiaInfo's President and Chief Executive Officer Steve Zhang. "Since the beginning of 2010, the government has placed a greater emphasis on the convergence of the telecom, cable and Internet industries in
About AsiaInfo Holdings, Inc.
AsiaInfo Holdings, Inc. (NASDAQ: ASIA) is a leading provider of high-quality telecom software solutions and IT security products and services to some of
Organized as a
The information contained in this document is as of April 5, 2010. AsiaInfo assumes no obligation to update any forward-looking statements contained in this document as a result of new information or future events or developments.
This document contains forward-looking information about AsiaInfo's operating results and business prospects that involve substantial risks and uncertainties. You can identify these statements by the fact that they use words such as "anticipate," "estimate," "expect," "project," "intend," "plan," "believe," and other words and terms of similar meaning in connection with any discussion of future operating or financial performance. Among the factors that could cause actual results to differ materially are the following: government telecommunications infrastructure and budgetary policy in China; our ability to maintain our concentrated customer base; the long and variable billing cycles for our products and services that can cause our revenues and operating results to vary significantly from period to period; our ability to meet our working capital requirements; our ability to retain our executive officers; our ability to attract and retain skilled personnel; potential liabilities we are exposed to because we extend warranties to our customers; risks associated with cost overruns and delays; our ability to develop or acquire new products or enhancements to our software products that are marketable on a timely and cost-effective basis; our ability to adequately protect our proprietary rights; the competitive nature of the markets we operate in; political and economic policies of the Chinese government. A further list and description of these risks
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
China's Panyu Cable Deploys Entropic's Broadband Access EoC Solution
Coaxial Cables and Connectors Make Vital System Links
By Nathesh,
Entropic Communications, a provider of silicon and software solutions to enable connected home entertainment, has announced that its Broadband Access Ethernet over Coax solution has been deployed by Chinese MSO Panyu Cable.
Panyu Cable is targeting the multi-dwelling units in
Entropic (News - Alert) has claimed that their broadband access solutions use coaxial cable infrastructure to deliver "last kilometer" connectivity for high-speed broadband access to single-family homes and MDUs. Their solutions are designed to work on passive coax networks which mean that the fiber node in HFC or PON network terminates at the last active device in a coax wide area network.
Panyu Cable has cited low latency and high-bandwidth delivery features of Entropic EoC as the reasons for selecting it. Panyu added that Entropic’s vast experience and field proven deployments, ease of use, cost effectiveness, and flexibility were also the factors that influenced their selection process.
Chen Jian Feng, CTO of Panyu Cable, has commented that successful deployments of home entertainment solutions in the United States based on the MoCA standard was a key factor in its decision to select Entropic’s EoC solution for deployment to their subscribers.
They have installed thousands of ShenZhen JetNet EoC products with the Entropic solution in subscribers' homes and have received extremely high satisfactory customer feedback. Additionally, Entropic's feature-rich and cost-effective EoC solution both fulfills the demanding bandwidth requirements for their subscribers today, and in their opinion is the only technology that can achieve the even higher bandwidth levels needed for the next-generation broadcasting network.
Officials with Entropic have added that they are proud to have been selected by Panyu Cable as the technology of choice for their deployment of an EoC solution for delivering high-bandwidth VoD and other new services to their subscribers. This deployment is another milestone in setting the standard for operators to increase ARPU while delivering next-generation broadband systems for subscribers throughout
A professional coaxial cable manufacturer,Hongfeng Co，offer a whole range of coaxial cables and lan twisted pair cables. coaxial cables including RG6 series, RG58series, RG59series, RG7series, RG11series, QR series, 500 series ,CAT 6 series, CAT 5 series, etc. Welcom to : http://coaxialcable.co.bokee.net
More related articles:
NCC to liberalize geographical coverage for cable TV operation
Coaxial Cables and Connectors Make Vital System Links