ebook PDF Understanding Radio for the Practical Engineer

A Practical Guide to the Principles of Radio Design. There are many books on the subject of radio design, but the majority of them are either too basic and do not really give enough information, or they immediately launch into advanced theory that, unless you are a math genius, is just confusing and unhelpful. How often have you searched for information in a reference book and found that the relevant section opens with something like: “It may be shown that…blah, blah {some huge and very complicated mathematical calculation}”? Do your eyes start to glaze over and you rapidly lose interest? Sometimes there are several pages of it. Undoubtedly it is technically correct, but if you have a problem to solve, you are not interested in the derivation of theory; all you want is the answer. Sometimes, a friend or colleague is able to explain in a few simple words what the reference book was unable to put across. If this sounds familiar, then I hope that this book will help. Of course some basic math is mandatory in engineering and, where this is appropriate, I shall quote the relevant formulae and expressions - but only in their final practical form as engineering tools. Let the academics concern themselves with theory. This is not intended to be a complete reference manual for RF design - the library shelves are, in any case, filled with reference books and these necessarily include all of the ‘theory’ that I am anxious to avoid. Rather, it is an attempt to fill in some of the ‘gray’ areas that cause difficulties for many young engineers today. It has been my privilege to work with some of the best engineers in the field of RF design, but I have also found many who showed a lamentable lack of knowledge. In my view, this is to a large extent because nobody is prepared to teach them, nor to give them time to learn for themselves. Modern commercial pressures dictate that only a limited time is allowed on each project and the important areas of design are carried out by those who already have experience in that field. Naturally, this makes sense to the project managers, but it means that the less skilled engineer will never get the chance to learn. It also means that there is a tendency for engineers to become ‘experts’ in a particular and often very specialized field, without ever being given the chance to develop their skills in other areas. It is most unfortunate for them if that expertise becomes obsolete. CAD is now considered to be an essential design tool in the electronics industry, but it is no substitute for basic understanding and knowledge. It may tell you if your design will work, but not if it was an appropriate choice in the first place, nor how to properly test and debug your finished design. Of course, a book cannot impart practical experience either. What I have attempted to do is to give a clear and concise description of the various circuit blocks, with an explanation of how to plan your design and select the most suitable devices. Each part will contain a section on test and measurement techniques and, where appropriate, I have included some frequently asked questions and a number of useful tips.

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

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

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.

* 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.

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: