DSP (digital singnalprocessor) is a unique microprocessor with its own complete instruction system. It is a device that processes a large amount of information with digital signals. A digital signal processor includes a control unit, arithmetic unit, various registers, and a certain number of storage units in a small chip. Several memories can be connected to its periphery, and it can interact with a certain number of external devices. Communication, with comprehensive functions of software and hardware, is itself a microcomputer. The DSP adopts the Harvard design, that is, the data bus and the address bus are separated, so that the program and data are stored in two separate spaces, allowing the fetching and executing instructions to completely overlap. That is to say, the next instruction can be fetched and decoded while the previous instruction is executed, which greatly improves the speed of the microprocessor. It also allows transmission between program space and data space because of the increased flexibility of the device. Its working principle is to receive the analog signal, convert it into a digital signal of 0 or 1, then modify, delete, and strengthen the digital signal, and interpret the digital data back to analog data or actual environment format in other system chips. It not only has programmability, but its real-time running speed can reach tens of millions of complex instruction programs per second, far exceeding general-purpose microprocessors, and it is an increasingly important computer chip in the digital electronic world. Its powerful data processing capabilities and high operating speed are the two most commendable features. Because of its strong computing power, fast speed, small size, and a high degree of flexibility in software programming, it provides an effective way to engage in various complex applications. According to the requirements of digital signal processing, DSP chips generally have the following main features:
(1) One multiplication and one addition can be completed in one instruction cycle;
(2) The program and data space are separated, and instructions and data can be accessed at the same time;
(3) There is fast RAM on the chip, which can usually be accessed in two blocks at the same time through an independent data bus;
(4) Hardware support with low overhead or no overhead loop and jump;
(5) Fast interrupt processing and hardware I/O support;
(6) Multiple hardware address generators that operate in a single cycle;
(7) Multiple operations can be executed in parallel;
(8) Support pipeline operation, so that operations such as fetching, decoding, and execution can be performed overlapped.
Of course, compared with painful microprocessors, other general functions of DSP chips are relatively weak.
ARM (Advanced RISCMachines/microprocessor) is a well-known company in the microprocessor industry. It has designed a large number of high-performance, inexpensive, low-energy RISC processors, related technologies and software. The ARM architecture is the first RISC microprocessor designed for the low-budget market. It is basically an industry standard for 32-bit microcontrollers. It provides a series of core, system expansion, microprocessor and system chip solutions, and four functional modules are available for production. Manufacturers configure production according to the requirements of different users. Since all products adopt a common software system, the same software can run in all products. At present, ARM occupies more than 90 shares of the handheld device market, which can effectively shorten the time for application development and testing, and also reduce research and development costs.
FPGA is the abbreviation of Field Programmable Gate Array. It is a product of further development on the basis of PAL, GAL, PLD and other programmable devices. It is one of the most integrated application-specific integrated circuits (ASIC). Kind. FPGA adopts a new concept of LCA (Logic Cell Array), which includes three parts: Configurable Logic Block (CLB), IOB (Input Output Block), and Interconnect. The user can reconfigure the logic module and I/O module inside the FPGA to realize the user's logic. It also has the characteristics of static repeatable programming and dynamic reconfiguration in the system, so that the functions of the hardware can be modified through programming like software. As a semi-custom circuit in the field of application-specific integrated circuits (ASIC), FPGA not only solves the deficiencies of custom circuits, but also overcomes the shortcomings of the limited number of gate circuits of the original programmable devices. It is no exaggeration to say that FPGA can complete the functions of any digital device, from high-performance CPUs to simple 74 circuits, all can be implemented with FPGAs. FPGA is like a piece of white paper or a pile of wood. Engineers can freely design a digital system through traditional schematic input method or hardware description language. Through software simulation, we can verify the correctness of the design in advance. After the PCB is completed, you can also use the online modification capabilities of the FPGA to modify the design at any time without changing the hardware circuit. Using FPGA to develop digital circuits can greatly shorten design time, reduce PCB area, and improve system reliability. FPGA is set up its working state by the procedure stored in the on-chip RAM, so it is necessary to program the on-chip RAM when working. Users can adopt different programming methods according to different configuration modes. When powering up, the FPGA chip reads the data in EPROM into the on-chip programming RAM. After the configuration is completed, the FPGA enters the working state. After a power failure, the FPGA is restored to a blank, and the internal logic relationship disappears. Therefore, the FPGA can be used repeatedly. FPGA programming does not require a dedicated FPGA programmer, only general EPROM and PROM programmers. When you need to modify the FPGA function, you only need to change a piece of EPROM. In this way, the same piece of FPGA, different programming data, can produce different circuit functions. Therefore, the use of FPGA is very flexible. It can be said that FPGA chips are one of the best choices for small batch systems to improve system integration and reliability. At present, there are many varieties of FPGA, including XC series from XILINX, TPC series from TI, and FIEX series from ALTERA.
What is the difference between them? DSP is mainly used for calculation, such as encryption and decryption, modulation and demodulation, etc. Its advantages are powerful data processing capabilities and higher operating speed. ARM has a relatively strong transaction management function, which can be used to run interfaces and applications. Its advantages are mainly reflected in control, while FPGA can be programmed with VHDL or verilogHDL, which has strong flexibility. It can be programmed, debugged, and reprogrammed. Programming and repeated operations, so you can fully carry out design development and verification. When the circuit has a small amount of changes, it can show the advantages of FPGA. Its on-site programming ability can extend the life of the product in the market, and this ability can be used for system upgrades or debugging.
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How far(long) the transmitter cover?
The transmission range depends on many factors. The true distance is based on the antenna installing height , antenna gain, using environment like building and other obstructions , sensitivity of the receiver, antenna of the receiver . Installing antenna more high and using in the countryside , the distance will much more far.
EXAMPLE 5W FM Transmitter use in the city and hometown:
I have a USA customer use 5W fm transmitter with GP antenna in his hometown ,and he test it with a car, it cover 10km(6.21mile).
I test the 5W fm transmitter with GP antenna in my hometown ,it cover about 2km(1.24mile).
I test the 5W fm transmitter with GP antenna in Guangzhou city ,it cover about only 300meter(984ft).
Below are the approximate range of different power FM Transmitters. ( The range is diameter )
0.1W ~ 5W FM Transmitter ：100M ~1KM
5W ~15W FM Ttransmitter : 1KM ~ 3KM
15W ~ 80W FM Transmitter : 3KM ~10KM
80W ~500W FM Transmitter : 10KM ~30KM
500W ~1000W FM Transmitter : 30KM ~ 50KM
1KW ~ 2KW FM Transmitter : 50KM ~100KM
2KW ~5KW FM Transmitter : 100KM ~150KM
5KW ~10KW FM Transmitter : 150KM ~200KM
How to contact us for the transmitter?
Call me +8618078869184 OR
Email me [email protected]
1.How far you want to cover in diameter ?
2.How tall of you tower ?
3.Where are you from ?
And we will give you more professional advice.
About Us
FMUSER.ORG is a system integration company focusing on RF wireless transmission / studio video audio equipment / streaming and data processing .We are providing everything from advice and consultancy through rack integration to installation, commissioning and training.
We offer FM Transmitter, Analog TV Transmitter, Digital TV transmitter, VHF UHF Transmitter, Antennas, Coaxial Cable Connectors, STL, On Air Processing, Broadcast Products for the Studio, RF Signal Monitoring, RDS Encoders, Audio Processors and Remote Site Control Units, IPTV Products, Video / Audio Encoder / Decoder, designed to meet the needs of both large international broadcast networks and small private stations alike.
Our solution has FM Radio Station / Analog TV Station / Digital TV Station / Audio Video Studio Equipment / Studio Transmitter Link / Transmitter Telemetry System / Hotel TV System / IPTV Live Broadcasting / Streaming Live Broadcast / Video Conference / CATV Broadcasting system.
We are using advanced technology products for all the systems, because we know the high reliability and high performance are so important for the system and solution . At the same time we also have to make sure our products system with a very reasonable price.
We have customers of public and commercial broadcasters, telecom operators and regulation authorities , and we also offer solution and products to many hundreds of smaller, local and community broadcasters .
FMUSER.ORG has been exporting more than 15 years and have clients all over the world. With 13 years experience in this field ,we have a professional team to solve customer's all kinds of problems. We dedicated in supplying the extremely reasonable pricing of professional products & services. Contact email : [email protected]
Our Factory
We have modernization of the factory . You are welcome to visit our factory when you come to China.
At present , there are already 1095 customers around the world visited our Guangzhou Tianhe office . If you come to China , you are welcome to visit us .
At Fair
This is our participation in 2012 Global Sources Hong Kong Electronics Fair . Customers from all over the world finally have a chance to get together.
Where is Fmuser ?
You can search this numbers " 23.127460034623816,113.33224654197693 " in google map , then you can find our fmuser office .
FMUSER Guangzhou office is in Tianhe District which is the center of the Canton . Very near to the Canton Fair , guangzhou railway station, xiaobei road and dashatou , only need 10 minutes if take TAXI . Welcome friends around the world to visit and negotiate .
Contact: Sky Blue
Cellphone: +8618078869184
WhatsApp: +8618078869184
Wechat: +8618078869184
E-mail: [email protected]
QQ: 727926717
Skype: sky198710021
Address: No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China Zip:510620
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English: We accept all payments , such as PayPal, Credit Card, Western Union, Alipay, Money Bookers, T/T, LC, DP, DA, OA, Payoneer, If you have any question , please contact me [email protected] or WhatsApp +8618078869184
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PayPal.  www.paypal.com
We recommend you use Paypal to buy our items ,The Paypal is a secure way to buy on internet .
Every of our item list page bottom on top have a paypal logo to pay.
Credit Card.If you do not have paypal,but you have credit card,you also can click the Yellow PayPal button to pay with your credit card.
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But if you have not a credit card and not have a paypal account or difficult to got a paypal accout ,You can use the following:
Western Union.  www.westernunion.com
Pay by Western Union to me :
First name/Given name: Yingfeng
Last name/Surname/ Family name: Zhang
Full name: Yingfeng Zhang
Country: China
City: Guangzhou
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T/T . Pay by T/T (wire transfer/ Telegraphic Transfer/ Bank Transfer)
First BANK INFORMATION (COMPANY ACCOUNT):
SWIFT BIC: BKCHHKHHXXX
Bank name: BANK OF CHINA (HONG KONG) LIMITED, HONG KONG
Bank Address: BANK OF CHINA TOWER, 1 GARDEN ROAD, CENTRAL, HONG KONG
BANK CODE: 012
Account Name : FMUSER INTERNATIONAL GROUP LIMITED
Account NO. : 012-676-2-007855-0
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Second BANK INFORMATION (COMPANY ACCOUNT):
Beneficiary: Fmuser International Group Inc
Account Number: 44050158090900000337
Beneficiary's Bank: China Construction Bank Guangdong Branch
SWIFT Code: PCBCCNBJGDX
Address: NO.553 Tianhe Road, Guangzhou, Guangdong,Tianhe District, China
**Note: When you transfer money to our bank account, please DO NOT write anything in the remark area, otherwise we won't be able to receive the payment due to government policy on international trade business.
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* It will be sent in 1-2 working days when payment clear.
* We will send it to your paypal address. If you want to change address, please send your correct address and phone number to my email [email protected]
* If the packages is below 2kg,we will be shipped via post airmail, it will take about 15-25days to your hand.
If the package is more than 2kg,we will ship via EMS , DHL , UPS, Fedex fast express delivery,it will take about 7~15days to your hand.
If the package more than 100kg , we will send via DHL or air freight. It will take about 3~7days to your hand.
All the packages are form China guangzhou.
* Package will be sent as a "gift" and declear as less as possible,buyer don't need to pay for "TAX".
* After ship, we will send you an E-mail and give you the tracking number.
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For Warranty .
Contact US--->>Return the item to us--->>Receive and send another replace .
Name: Liu xiaoxia
Address: 305Fang HuiLanGe HuangPuDaDaoXi 273Hao TianHeQu Guangzhou China.
ZIP:510620
Phone: +8618078869184
Please return to this address and write your paypal address,name,problem on note: |
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