#transmitting set

[webnetr-blog]

U.S.A. FCC allows Modeo to improve the transmitted power, it is DVB-H that contends for markets

Federal communication committee (FCC) of U.S.A. Permitted the broadcaster Modeo of the mobile television to bring transmitted power up to 10 times in the urban areas a few days ago, improve to 20 times in the rural area. DVB-H mobile television that this measure has expanded Modeo greatly covers the economics, and reduced American Telephone and Telegraph Company (AT&T) Join potential impact of MediaFLO of high pass with Verizon recently. MediaFLO is another mobile television technology. Modeo held a special news conference in New York recently, show mobile television mobile phone and the New York DVB-H second experimental network produced by HTC that this company releases newly. The above-mentioned regulation is suitable for China L frequency band of 5MHz that Modeo was bought in 2003, among 1,670-1,675MHz. It has brought always transmitted power of permission of the urban areas up to 20kW from 2kW, always the transmitted power of permission is improved from 2kW to 40kW in the rural area, According to the intersection of Modeo and the intersection of president and Michael Ramke of Company, after power raise, can required the intersection of transmitting set and quantity of site reduce by 80% cover market, and will accelerate the cloth administration and lower costs. However, the above-mentioned regulation of FCC is only limited to at first the preliminary market cloth administration of Modeo plans the areas of market of 30 honeycombs (CMA) listed ,Cover about 40% of the population of U.S.A.. The progress of the mobile television project of Modeo is in important moment at present, it announced the urban test point of New York in December of 2006. This test point has used 65 transmitting set sites, the cover area reaches 475 sq. mi., population is up to 10 million. According to the network cloth administration's executive vice president Jason Caliento of Modeo, it has also covered a large amount of floating population, including 40 million visitors and 100 million aviation passengers every year. Send out, approve for not long ago while being above-mentioned in FCC, AT&T announces that will utilize technology of MediaFLO USA to offer service of moving amusement and information together with Verizon on February 12. The rival MediaFLO USA of Modeo is a constituent company of high pass. Show, though Verizon and AT&T announce the technology who will adopt MediaFLO USA, " but 70% of the effective markets still remain to strive for according to Ramke of Modeo Company. The contest in the market of mobile television has just just begun. The win and defeat will be determined by the fact that the consumers of market of Volkswagen will accept the situation, but not determine from distributing the agreement. "

[liesarg-blog]

Kindness ultra high-frequency transistor Pu bring the new break-through for the broadcast transmitter of the TV intelligently

Kindness Pu introduce first genuine 300W ultra-high frequency (UHF) in the world intelligently Transistor-resistor logic, namely the sixth generation of high-pressure LDMOS transistor-resistor logic BLF878. New high-power transistor this to can offer 300W solution of power with remarkable linear characteristic and the intersection of stability and characteristic in whole the intersection of UHF and wave band while being only at the market, mainly face the transmission of television and market of radio. Television broadcasting launches the trade and raises the output power in order to meet high definition TV's demands constantly, broadcast trader rely on kindness latest high-efficiency solution this of Pu can improve output power notably intelligently, lower costs at the same time.

The high-performance TV transmitter of today is enormous in investment, so the broadcasting trader is seeking to utilize the mass data of power transfer to the maximum extent, thus realize and broadcast DVB-T and DVB-H in the family ' Digital vedio broadcasting) Program. BLF878 ultra-high frequency (UHF) The high-power LDMOS transistor-resistor logic makes this become possible, it can obtain the output power of maximum from the given input power, the permanent wave (CW) Efficiency is improved to 55%, the efficiency of digital broadcasting is improved to 32%, thus make the radio trader save a large amount of cost. Because there are not other competition products that can support the whole UHF wave band with 300W power, the same characteristic, broadcast trader can new solution Pu less assembly come, offer lateral power this with relative before intelligently through kindness, thus further save the cost.

Kindness Pu flagship the intersection of products and BLF861A the next half years introduce to the market on 2000 intelligently, already become the de facto sector standard, the present customer includes the world in the first 5 big TVs of broadcast equipment manufacturers. BLF878 UHF high-power LDMOS transistor-resistor logic is a very stable solution, can stand the severe test of the high-performance radio operation job, its voltage standing wave ratio (VSWR) It is 10:1.

Kindness Pu also put out a new 50V high-pressure transistor-resistor logic series LDMOS in the fourth quarter of 2007 intelligently, its target market is industry, scientific research and medical field.

Stock situation

BLF878 UHF power LDMOS transistor-resistor logic provide samples for appointed customer in the third quarter of this year, and in the batch productino in the fourth quarter of this year. If need to understand more information, please visit www.nxp.com/rfpower.

[pedese-blog]

The kernel module batch productino of the transmitting set, CMMB ground network overlapping raises speed

Continue until 4 Olympic the intersection of city and commissioning succeed, 2008 Olympic Games annual and at the beginning of, Beijing digital line of sight Science Technologies Co., Ltd. announce will it be October 2007, can already realize by the CMMB modulation driver Cello-GAF which this company researched and developed and produce in batches. The CMMB modulation driver is a heart of CMMB transmitting set, the batch productino of this key equipment, mean the ground network overlapping of CMMB in the main city of China will be accelerated greatly, watch TV and become reality during the Olympic Games with the mobile phone. This type has been for the modulation driver of Cello-GAF already with the wide science and technology in the north at present, the transmitting sets of famous producers such as Rod and Schwartz, Toshiba, Thompson,etc. adjust the successful antithetical couplet, and participated in the ground networking of 8 cities in CMMB first run China, apply to CMMB networks of Qingdao, Shenyang, Qinhuangdao, these 4 Olympic cities of Guangzhou and succeed in opening and using. Cello-TAF has good technical feature, its bandwidth can cover the wave band of whole UHF and VHF, meet the frequency that national Chinese General Bureau of Radio, Film and TV networks to CMMB ground to plan in an all-round way; It is only 1 hertz that its victory turns into the frequency and tunes marching; Support the SFN and have efficient precorrection functions, raise the efficiency of the transmitting set, save energy consumption, the strip shoulder of Cello-GAF modulator can reach 52dB, the transmission machine belt shoulder after correcting can reach above 40dB, key indexes such as its out-of-band stray, in-band flatness, frequency stability, overrun adjustment,etc. have reached the great level of the international like product, can make CMMB signal quality higher, CMMB terminal received signal is more sensitive, the picture is clearer. The digital sight company shows, Cello-GAF is the industry the first announces the CMMB modulation driver of all right batch productino, it means CMMB industry chain is upstream to launch partial important links to get powerful support that its success is released, cooperate and achieve the enterprises of terminal key links of low reaches of industry chain such as firm video-information, Lenovo, resurgence,etc., will further strengthen CMMB industry chain, accelerates the accomplishment of CMMB earth net work, thus guarantee to offer mobile phone TV service during Beijing Olympic Games.

[quarcl-blog]

General Bureau of Radio, Film and Television calls the not yet real arrangement of national standards of digital television of ground

Dispute on the constant ground Digital Television Standard and come to an agreement for August 1 and implement by force originally, the very moment in the past but in August soon, amazing news has come from official side. Deputy Bureau Director Zhang Haitao of national Chinese General Bureau of Radio, Film and TV revealed a few days ago: Digital Television Standard has not implemented as scheduled for August 1 on the ground. " the formal national standard has not been really disposed yet " On August 21, in " scientific and technological development forum of the fair of international radio,film and television " Keynote speech in,Zhang Haitao show,"it is formal national standard now dispose we really yet " . Zhang Haitao introduces: "Test and experimental work of the ground digital television national standard also go on in full preparation at present, the related standard is being still made, accord with the transmitting set, receiver of the national standard also in the course of industrialization, the overall implementation of the national standard also needs a little time. " He still shows, Chinese General Bureau of Radio, Film and TV has organized relevant strength to make 17 items of complete network standard, in addition also need preparation on the industry, the tasks amount of various fields are very big, so fail to implement on August 1, but Chinese General Bureau of Radio, Film and TV is accelerating the progress as much as possible. "Once the test of the national standard apparatus is finished, related standard formulation is finished, the general bureau will know unified plan, promote the implementation of the national standard in an all-round way. " Zhang Haitao emphasizes. " everybody should stop first " In fact, operator of many province and city broadcasting and TV has already launched the national standard and run. It is reported, dozens of cities all start broadcasting the mobile television on public transit, subway at present, 6 pilot cities of the Olympic Games begin to use the ground digital television too. Zhang Haitao shows, " before disposing in unison, everybody wants to stop first, no matter any standard is not the national standard now " . Regard mobile television as the standard, one thinks, digital television should guarantee the public service first on the ground, that is to say that can relay the Off-The-Shelf public service program, the wireless program broadcasting the simulation now realizes replay. It is reported, up till now, no mobile television can meet requirements for this one. The ground digital television, from imitating carrying out the transition to the figure, according to the situations of the other countries at present, take decades usually, so in general, ground figure video to at all realize and take time even.