The composition of CATV adjacent frequency modulator system

In the cable television system, as long as the standard image load rate is separated from the image carrier frequency by 8MHz, it is the "adjacent channel" of the channel.

1: Transmission in the cable television system, as long as the standard image load rate is 8MHz away from the image carrier frequency, it is the "adjacent channel" of the channel.

In front-end equipment, intermediate frequency processing, adjustable AV ratio and amplitude-frequency stabilization technologies are commonly used. Signal adjacent frequency configuration and supplementary channels are enabled, which greatly reduces interference, improves stability, and greatly increases channel capacity. In the past few years, 300MHz, 450MHz, 550MHz adjacent frequency systems were used at home and abroad to accommodate 28, 47, and 59 channels, respectively, for 750MHz adjacent frequency systems up to more than 80 channels, and 860MHz or even 1000Mz bidirectional adjacent frequency systems are the modern development direction.

2: In the transmission trunk line system, the use of integrated module technology and trunk amplifier with ALC and other functions, coupled with a larger diameter coaxial cable, can make the transmission trunk line up to 10km, and can maintain good images and sound If the quality of the optical cable transmission system is adopted, the transmission distance without relay can reach more than 50km.

3: In terms of system, it can realize two-way transmission function. The data and signals to the front end currently use 5~65MHz and 750~1000MHz as the uplink frequency band, and 65~750MHz is the downlink broadcast frequency band.

4: In terms of televisions, it is required that televisions develop in the direction of digitalization, high-definition, and three-dimensionality, which raises the requirements for television technology and promotes the development of the television manufacturing industry.

At present, the cable television system in many areas of our country uses adjacent channels and supplementary channels to transmit TV programs. Its system consists of signal source receiving and front-end system, transmission system and distribution system. Due to the adjacent frequency transmission method, the structure of the front-end system is determined by the number of received satellite TV programs, the number of TV channels, the microwave transmission signal, the strength of the above-mentioned program source signal, the number of self-run programs, and the size of the system. Select the equipment configuration of this system based on various factors.

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
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E-mail: [email protected]
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Pay by Western Union to me :

First name/Given name: Yingfeng
Last name/Surname/ Family name: Zhang
Full name: Yingfeng Zhang
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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
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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

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