Jidong Telecommunications

Just about Telecommunications Reviews


Mobile Services – The Future Vision Of Inspiring Standard Of Living

Mobile phones are an incredible invention that has revolutionized the way people interact with each other. All mobile operators offer prepaid and postpaid mobile services options that benefit the consumer. The specifics of diverse prepaid and postpaid mobile plans are usually made to outfit different kinds of customers requirement depending upon their budget and necessarily. For instance, do you text a lot, surf the internet, or call outside your home state during off peak times? The airtel operator offers a wide range of mobile tariff plans to fit according to your necessity, both for the prepaid and postpaid mobile customers.

airtel has the visualization to be the leader in communication technology services to all sections of people. airtel mobile operator has got the best network coverage that ensures best mobile connectivity services. There are lots of mobile operators who provide cheap tariff plans, but you can hardly use the phone because of the lack of signal coverage issue. Make sure to choose the mobile operator with good network coverage signals, one of which is the airtel mobile operator. airtel mobile phone network presents a complete range of mobile telecommunications services to its subscribers that include both voice and data communications. High level of call quality is assured with airtel mobile services and the costs of the services delivered are also kept quite reasonably.

People have happened to passionate about most up-to-date mobile phones. In present time, every single person wants to bear sophisticated smart phone instead of old gadget to fulfill their necessities. But many a times, they have to compromise with quality due to costly cell phones and tariff plans. In such circumstances, airtel mobile deals can help you a lot to provide favorite handset with amazing features and attractive tariff plans. Under these deals, customers can get cost effective tariff plans with advance gadgets on numerous leading brands like Nokia, Blackberry, HTC and so on.

With the launch of 3G mobile services, the airtel mobile operator reveals their impressions on the future scenario and welcomes customers to be their partners in innovation to shape the future of new mobile era. Enrich your lifestyle with latest phones, best network coverage and attractive tariff plans with airtel mobile services.

Tags:

Beginner Guide To A Pic Programming

To read with photos Come to http://www.promeganet.com

1. Beginner guide to a PIC Programing

The following link is a tutorial series on the 14-bit core PIC family made by Microchip. It covers common PICs like 16F84, 16F628, 16F87x etcIt tells you nearly everything about its architectures like program code bus and data bus and many other aspects like Reset, Oscillators etc. It is much easier to learn while someone is talking to you via diagram and animated drawings. At this moment, the following areas are covered:

Architecture, Instruction Set, Development Tools Overview, Device Configuration, Resets and Oscillator

I also strongly recommend reading PICmicro Mid-Range MCU Family Reference Manual as it contains important information of all 16F PIC features. Example topics covered includes Device Structure and Varieties, explaining the Oscillator, Memory Organizations and EEPROM, Interrupts, Ports, Timers, A/D, LCD, CCP, Watchdog, the Instruction Set, and so on

But most important thing is you should familiar electronics and programing to do pic project

2. Which PIC to choose?

For hobbyist, usually we would like those PICs that allow us to program it many many times. So this rules out PIC that has a C in its part number which usually is of the type one-time programmable. The F in its part number generally means Flash technology and this type of PIC are what we often used for experimenting.

Many examples and projects we found on the Internet built around 16F84, but please keep in mind that this PIC is old, more expensive, less powerful and now obsoleted, so dont use it for any new design, unless you dont have the source code for your project but stuck with just the HEX object code.

If you are new to PICs, youd probably buy the 16F628A or 16F88. There are many tutorials and schematics that use them. It is not difficult to adapt 16F84 source codes for use on newer PICs. For experienced users, it is even possible to disassemble the object code for 16F84 and use it with newer PICs.

16F628A-18Pin, Flash based,Internal Oscillator, PWM module, ICSP, USART
16F88-18Pin, as 16F628A but with added A/D converter

If you are looking for bigger PICs to have more I/O pins, try 16F876-28 pin and 16F877-40pin or their newer A version.

Also small PIN count PIC: 12F675-8pin or 10F206-6pin! 508a-pinout Later you may want to advance to 18F PIC series, which are called High End, because they are more powerful and have better support for higher level languages (mostly C optimized). Just for information, there is also a DsPIC series from Microchip, which offer 16-bit core and DSP capabilities and with clock frequency up to 160Mhz brings you absolute top power solution These CPUs are really powerful.

3.Refer Datasheets first

4. What is involved in using a PIC

A PIC is piece of plastic with pins sticking out. It will do nothing. Internally it has memory which can store binary instructions that it understands. So we need to translate what we wanted it to do into binary instructions stored inside the PIC. The whole process involve two steps. Human instructions can be in the form of computer languages like C or JAL or assembly. (Download mplab to write assembly pic programs) We write the instructions in a text file and a software translate/compile/assembly it into another text file containing HEX codes representing binary instructions that the PIC understands. This is called the object file. Then a piece of hardware(called Hardware device programmer) which sits between the Personal Computer and the PIC whose job is to read the object file and transfer it into the PIC, more often with other functions like reading codes back out from the PIC or verify the codes with the object file. Another piece of software(programming software) is required to control this piece of hardware to perform these functions. Dont confuse this software with that for compiling the human instructions into object form. Free assembly coding tutorials Download When the HEX file is ready, there are two ways to download it into the flash memory of the PIC. One can either use a hardware device programmer mentioned above or a bootloader via serial port of the PC. A bootloader is some codes inside the PIC which read data from its serial RX/TX pin and program the data into the flash memory. This allow very easy operation when one wants to develop codes without the need of a hardware programmer. However, there are some catches.( We commonly use ICPROG to write hex file in to pic. Download ICPROG) a. Not all PICs can support bootloader operation as only those that can program their own flash memory will work b. The bootloader code must be loaded into the PIC first by a hardware programmer c. Bootloader takes up some code memory spaces d. The PIC will have to be running at the time of programming e.

4b. What hardware device programmer to use Programmer circuits:

We recommend the parallel programmer P16Pro40 as many had been built and works perfectly. A warning: Serial programmer designs like JDM or RCD relies heavily on the current and voltage capability of the serial port on your PC/laptop. If it works, congratulation. If it doesnt, bad luck. There is nothing you can do to make it work.

5. PIC Programming softwares:

There are many choices and are listed below in no particular oder. There is no limit on how many you can use as different software features different PIC types support. Check the software to see if it actually supports the PIC that you use. IC-Prog PicAllW 18F PIC Programming Software WinPic WinPic800

6. Some of my PIC output PINs are not working!

This is a common problem. Usually people try to output logic 1(HIGH) to PINs which are only inputs (aka PORTA,5 or PORTE,3 are usually Input only), or you are trying to get 5V from a PIN which can only pull down to 0V GND. Such PIN is called Open drain Output, similar to open-collector in TTL logic. Such PIN is missing a MOSFET transistor from VDD to PIN, therefore PIN cant go HIGH. And of course the MOSFET transistor which is there connecting PIN to VSS cant output high but only 0V. If you want to use it as a general TTL compatible output, just add a Pull-up resistor from that PIN to +5V (4K7 is good). But keep in mind this logic 1(HIGH) wont be strong enough to drive a LED! (If you want to drive LED with it, connect anode of LED to +5V via a current limiting resistor and its Cathode to PIN, this will allow you to turn on the LED by putting logic 0 on the PIN. Beginners usually dont like Open Drain/Collector PINs, but they will find it useful latter, when they advance into self-designing level. Make sure that any internal PERIPHERAL is NOT taking over desired PIN, For example if you activates TIMER1 oscillator or ICD support, you cant use PORTB6,7 for ANY other purpose! This applies to both Input and Output problems. List of peripherals (and features) that may cause problems: MCLR – may prevent PINs PORTA,5 OR PORTE,3 to be used as general purpose input, disable it by clearing Master Clear Enable bit in configuration register. Comparator Module – pins PORTA 0-3 are defaulted to Analog mode with comparators enabled. Writing a correct value to CMCON register (read Datasheet) will disable them. (Affected devices: 16F628, 16F628A, 16F876A, 16F877A, 16F88, 12F629, 12F675, 12F683 and more) LVP – this is a special way of programming PIC with only +5V on MCLR and LVP pin PORTB3 or PORTB4 will control if PIC is on normal or in program mode. because this feature will takeover/block one PIN in the middle of an eight bit port, I highly recommend to DISABLE it by clearing LVP bit in config register. ICD support will allow you to debug the PIC, but if you dont use ICD, under no circumstances enable DUBUG bit in config register, this would reserve PORTB6 & PORTB7 pins and your program wont be able to use them.

7. Some of my input PINs are not working!

First check the datasheet if the default state of the PIN is Digital Input, if it says that the Reset state is analog (comparator or ADC), you need to disable analog feature at the beginning of your program. This is a common problem, when you switch from 16F84 to 16F628 without rewriting the program (16F628 has Comparators turned on by default, whereas 16F84 doesnt have them at all). Also if you plan to use PORTA,5 or PORTE,3 as general inputs, you have to disable MCLR function first because they share the same PIN.

8. What are Watchdog, CCP, Timer etc

Watchdog timer (WDT) is an Independent oscillator+timer, that will reset (or wake-up) the PIC if you dont clear the timer value periodically. This clearing has to be done regularly in your PIC software by calling CLRWDT instruction. Watchdog prevents your program to be locked in infinite loop, because if it get stuck, the CLRWDT instruction wouldnt get executed and the PIC will reset and get out from the loop. Or you can use Watchdog to periodically wake the PIC up from sleep, and thus saves one precious Timer (that can be used elsewhere). The WDT is a crude RC oscillator, its accuracy is very poor, and highly dependent on external factors such as temperature. However, this doesnt matter for its designed purpose as a watchdog. CCP is a unit that has three functions: a. In Capture mode, CCPR register captures the 16-bit value of the TMR1 register (Timer1) when an event occurs on pin RB3/CCP1. b. In Compare mode, the 16-bit CCPR register value is constantly compared against the TMR1 register pair value. When a match occurs, the RB3/CCP1 pin is altered (see datasheet) c. In Pulse Width Modulation (PWM) mode, the CCP1 pin produces up to a 10-bit resolution PWM output. Since the CCP1 pin is multiplexed with the PORTB data latch, the TRISB bit must be cleared to make the CCP1 pin an output. Timer unit has to modes of operation: d. Counter mode, is counting impulses from a dedicated input pin. This can serve also as a debounced input (Timer overflow will indicate that a button was pressed) e. Timer mode, is counting oscillator pulses (Primary or Secondary), this will allow your program to know how much real time has passed (to construct delays, software serial buses etc)

9. Simulate Pic program before make hardware

Using proteus you can simulate your dream circuit. You can test your project before make it.The Proteus Design Suite is wholly unique in offering the ability to co-simulate both high and low-level micro-controller code in the context of a mixed-mode SPICE circuit simulation. With this Virtual System Modelling facility, you can transform your product design cycle, reaping huge rewards in terms of reduced time to market and lower costs of development.

continue reading and see pictures http://www.promeganet.com
free electronic e books and software

Fiber Optics Explained For The Rest Of Us

The Principle of fiber optics is based on transmission of data by means of light. Concept of fiber optics was first conceived by Claude Chappe in 1790’s. His idea for fiber optics was based on an optical telegraph concept invented by Graham Bell also tried the means to send information by the atmosphere but did not succeed. Finally, fiber optics emerged with the onset of new era based on the principle of total internal reflection which is a distinct quality of light rays.

Fiber optics emerged and grew into more advanced phase due to requirement from radio and telephone engineers. These engineers required more bandwidth for data transmission. Thus these engineers had been looking out for a medium to transmit data in more reliable and faster form rather than copper cables. They also wanted to avoid the hazards of electric shocks and interference which were a constant problem of copper cables.

Fiber optics had attracted some attention because they were analogous in theory to plastic dielectric waveguides used in certain microwave applications. Finally a technology evolved that used glass or plastic threads to transmit data. Cables involved in fiber optics contain several bundles of glass threads which are capable of transmitting data in modulated form.

With the onset of fiber optics and fiber optic cables data started to transfer faster as fiber optic cables have greater bandwidth than metal cables and are more resistant to external interference. Lighter and thinner fiber optic cables readily transfer data in digital form rather than analogue form. This technology is most useful in computer industry which now forms an integral part of telephone, radio and television industry.

Telecommunications applications of fiber optics use flexible low-loss fibers, using a single fiber per optical path. Along with the communication industry fiber optics plays an important role in medical and industrial applications also. Many medical appliances like endoscope use the principle of fiber optics. Industrial applications viz. in television industry use the principle of fiber optics to obtain flattened images in cathode ray tubes.

Fiber optics yield distortion free data transmission in digital form. The audio waves transmitted via principle of fiber optics deliver accurate signal transfer. Fiber optics is also useful in automotive and transportation industry. Traffic lights, organized and scrutinized highway traffic control, automated toll booths, etc. are some of the benefits of application of fiber options in the transportation mechanism.

Cable TV companies and Internet Service Providers equivocally find fiber optics indispensable in their industry. Fiber optics provides tamper free, high bandwidth and larger data carrying capacity to the service providers. This eventually leads to better consumer satisfaction.

Unlike copper wire system fiber optics do not use and electrical form to carry data. The use of light gives a competitive edge to fiber optics over regular data transmission options. But eventually use of fiber optics is very expensive as compared to copper cabling system.

The World’s Fastest 3g Usb Modem Zte Mf680

With the development of USB Modem, there is no fastest only faster supporting from the network evolution. We have experienced the speed of 3.6Mbps, 7.2Mbps, and 21Mbps is all the rage now. But the markets are keen for upgraded new modems with faster, more fashionable or more unique. Then, 42Mbps speed USB modem emerges as time requires.

The worlds leading telecommunication equipment vendors, such as Huawei, ZTE, Sierra Wireless, all lauched their high speed modem up to 42Mbps. As we know, Sierra Wireless aircard 312U is on the market for long time, but Huawei E372 USB Stick is still on the way. Good news is that ZTE MF680, named Rose Queen is available now. From the name Rose queen, the impression is that this modem is apt to female. Right, ZTE MF680 HSPA+ modem is designed in Pink, maybe it would be more popular in female users. The appearance looks like ZTE MF668 21Mbps USB Modem, but MF680 should be more succinct and cute, and would be more attractive. Following MF668s retractable USB slider, it can be easily adjusted and plugged into any USB interface and also supports a MicroSD card with data storage of up to 32 GB.
The MF680 is a super high-performance modem that brings the speed of third generation (3G) data communications closer to the requirements of 4G networks (known as LTE), with download and upload speeds of up to 42Mbps and 5.76Mbps respectively.Using the MF680 is like driving a superb racing car, but the heat output is small. In networking tests of operators in dozens of countries, the MF680 has performed optimally with rates close to the theoretical limit.

The MF680 has been especially designed for HSPA+ networks, providing users with an extremely powerful mobile broadband experience. This stylish device allows customers to enjoy high-speed mobile broadband wherever the network is ready. Unlocked MF680 could be used anywhere all over the world. And it could support Windows, Linux, and Mac operation system. So there is no problem to support almost all the mainstream PC.

ZTE Modem is usually more popular than Huawei or other brand modem, not only because the price is more comparative, but also the quality is good and reliable. ZTE is the world’s second largest and fastest growing supplier of mobile broadband devices, with sales of nearly 30 million mobile broadband devices in 2010, and an annual growth rate of over 100 percent since 2007. ZTE is one of the few manufacturers globally which could provide devices with UMTS, HSPA, HSPA+, EVDO Rev A/B, WiMAX and LTE technology etc. Adhering to make the consumer to cost less money to enjoy fantastic surfing experience, its expected ZTE New modem MF680 would be the new star in near future.

Philips Ambilight 56pfl9954h12(56pfl9954)(video Review)cheap Tv

Philips Ambilight 56PFL9954H/12(56pfl9954/12) 56Inch Cinema Screen 21:9 TV Review/Test

The Philips 56PFL9954H is the world first 21:9 LCD television with Ambilight and built in digital tuner. Get ready to take your home entertainment to the next level, and well and truly have your sock blown off by this superb television.

The fabulous 56inch full 1080p HD LCD has some really outstanding features that rival no other. The amazing Cinema 21:9 format perfectly matches the original movie format that you see in the cinema and that is used by film directors. The 56 inch full HD panel is the perfect size and shape for this immense cinema style viewing without the black lines on the top and bottom of the screen. The screen is not only capable of the 21:1 format when watching movies but the intelligent advanced formatting technology found within the high gloss cabinet, perfectly adjusts the picture to fit without distorting the image or stretching a scene.

The Ambilight is best described as surround sound for your eyes; it opens the screen up, grabs your attention and draws you in. The Ambilight found on the 56PFL9954 Cinema 21:9 screen is intense and follows and changes colour to match the on screen action. If there multiple images and colours on screen the Ambilight will change to match each colour and moves as the image does.

The full HD screen on the Philips 56PFL9954 Cinema 21:9 LCD television offers extremely sharp images, vivid colours, and superb contrast. To get the most of the 56PFL9954 you need a high definition source such and Blu-ray player, up-scaling DVD or games console. Over 60% of DVDs are compatible to the 21:9 formats however even if they are not the 56PFL9954 can automatically adjust the image to suit. The Philips 56PFL9954 is also ready for the Digital Switch over with a built in Freeview tuner, and with a response time of less than 1ms and a 200Hz response the 56PFL9954H you will have no image imperfections when it comes to watching fast moving sports or action movies . The Philips 56PFL9954H is by far one of the best additions to any home cinema system that we have seen for a while, you will not be disappointed.

For more information on the Philips Ambilight 56PFL9954H(56PFL9954) 56inch television go to www.soundandvision.co.uk

Picture/Display

56 ” Diagonal Screen Size (Inch)

142 cm Visible Diagonal Screen Size

21:9 Aspect Ratio

80.000:1 Contrast Ratio

176 Degree Viewing Angle

Progressive Scan

2560x1080p Panel Resolution (Pixels)

1 (ms) Screen Response Rate

1080p resolution

3D Comb Filter

2250 trillion colours processing

200Hz

Manufacturers Technology Features

HD Ready

Ambilight

Perfect Natural Motion

Perfect Pixel HD

Convenience

Digital TV Ready

Freeview

Parental Lock/Parental Control

Teletext

1200 Page Teletext Memory

On/Off Timer

Sleep Timer

Clock

EPG (Guide Plus+)

Sound & Power Output

Virtual Dolby Surround

BBE Sound

4x 15 W Front Speaker Output

2x W Subwoofer Speaker Output

Connections

4 x HDMI Connection/s

1 x S-Video Connection/s

1 x Component Video Connection/s

1 x Co-axial Digital Connection/s

1 x Headphone Socket

1 x USB 2.0 Connection/s

2 x RGB Scart Connection/s

1 x PC D-Sub Connection/s

Power, Weight & Dimensions

400 x 400 Vesa Universal Wall Bracket Fitting

31.9 Kg Unit Weight (Approx)

50 Kg Weight Inc Packaging (Approx)

1418 x 691 x 105 mm (W/H/D) Dimensions

5 C to 35 C Ambient Temperature

281W Power Consumption

0.15 W Standby Power Consumption

AC 220 – 240 V +/- 10% Power Supply

Watch Tv Live On Your Computer Pc Or Mac

WATCH TV FROM PC
TV industry has come up with different ways on watching TV. They come a long way from different screen and black and white color to high definition color. They have set the programs leaving the viewers wanting more from them. The future is in online TV viewing and movies. This new technology if quickly taking over and companies like Blockbuster, Netflix, Redbox and many others are expanding and converting over to this.
The IPTV obviously stands out now because it had always been constrained by the transmission speed of the internet. The only thing really internet about IPTV is that it utilizes the internet network to transmit its TV signals. With broadband, IPTV can now zoom freely over the internet network. The niche of IPTV is catching on really well and it is accessed and watched on PC. This can also be wired out to TVs but the landing console of the programming is the PC. The sources that are basically used are Free-to-Air broadcasts from all over cyberspace making it clearly free TV on PC. Also is said that Telecommunications and Information technology have made it easier for people to stay connected to local Television. With the live TV from PC solution, the benefits are far too many to mention. Most importantly and considering the Information Age we live in, these benefits clearly fit into the life styles of the great majority.
There are many viewers who are more technology savvy taking advantage of this form of TV. The leading providers offer a host of benefits which would make it a no-brainer option but you have to be more careful due to scams. Make sure to shop only in secure e-commerce establishments like Click bank and consider only those with full money-back guarantee. THESE online TV have brought many people to watch live TV from their PC at anytime and from any part of the world. It depends on how you organize yourself and have a desktop or laptop and access this to internet. Here are some benefits you get when you watch live TV from your PC.
You can watch your favorite show while you are far or near destination on fright.
It is easy to avoid conflict with your host at travel regardless the difference in your choice of your favorite TV programs.
Also it is good because you can choose any channel at any given time and watch.
You can follow an important program of your choice in a closed setting without interruption
Watch your regular favorites without leaving your private work desk
Apart from travel, you can also make sure you are not paying more in ordinary cable or satellite TV bills than the time you actually spend in front of your TV set watching TV. This can be made more certain with the extra possibility offered by HD TV sets with internet connectivity capabilities. You can also connect your computer directly to your TV set – it’s simple and easy.
Nowadays things are looking brighter for people who have long been watching TV from their pc with the entry of proprietary software that enables anyone to watch TV on PC. The beauty of being able to watch TV on PC is its simple to set up the requirements. The software works on most personal computers whether it is a desktop or laptop, and connects to thousands worldwide TV stations via an internet connection. This means many of international TV channels and hours of movies, entertainment, documentaries, and news are always available.
Discover how you can watch TV on your computer live with over 3500 channels FREE

The Rigol Ds1052e Lightweight, Portable, And Accurate

An oscilloscope is an electronic test instrument that measures varying voltage levels, on a Y axis. Generally, it will chart one or more potential electrical differences on a visible two dimensional chart. These instruments are used the exact wave shape of an electrical impulse. It can show consistency, distortions, and frequency, which is useful in science, medicine, engineering, and telecommunications.

The Rigol DS1052E is a two-channel digital oscilloscope. It features a 50MHz bandwith, two channels, two probes, a USB cable, and PC sofware. It offers one gigasample per second, and one Mpts of memory depth. Choose from an array of trigger modes, including Edge, Slope, Video, Pulse Width, and Alternate. The 5.6 k TFT Color LCD screen offers a vivid waveform display with eight bits of vertical resolution, making your results easy to read and to interpret.

Adjustable sensitivity allows the Rigol DS1052E to filter irrelevant noise from the larger signal and give an accurate waveform reading, avoiding false triggers. This means accurate reads on the electronic waves you want to measure without artifact measurements of those you do not. Coupled with the bright, vivid, easy to read screen, you are ensured a clear, accurate read-out.

Advanced Features

Ultrazoom is an important feature for the Rigol DS1052E, because it offers a sample of up to one million measurement points. This offers you the opportunity to zoom in and measure and observe a sample at any point within a given pulse. Zoom out and observe the frequency and pattern of the waveforms as they occur.

A user friendly file system is built into the oscilloscope, allowing you to save information on a flash drive or download it onto your computer. A USB cord is provided. While the device, itself, is lightweight and portable, the convenience of carrying your results in a flash drive is invaluable, and it gives you the ability to demonstrate or display your results in various venues and environments.

Because the Rigol DS1052E is Pict Certified, you have the opportunity to connect a printer to the USB host port on your device and print out your measurement results. A hard copy of your findings can be copied, shared, and filed, making your research and findings more readily available to all who need access to them.

Adjustable trigger sensitivity is the feature which truly makes this a dependable, accurate device. You can choose the sensitivity level at which you will be working, allowing as much or as little of the outside electrical activity and noise to interfere as you wish. Get a crisp, clear reading of only the activity you are interested in measuring by adjusting the sensitivity level accordingly.

Depending on the purposes of your research and the details you need from your findings, you are able to use waveform intensity adjustments to personalize your on-screen read-outs. This does not change your findings, but rather, your view of the waveforms, so that you can study them in as much or as little detail as necessary for your research.