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Professional RF solutions for upgrade of master control system in China Central Television

Introduction

CCTV (China Central Television) is the biggest and most important news media in China.
There are 19 antennas, which are used to receive and transmit TV signals, located in 3 positions in the TV station.
The distance between any two positons is more than 500meters, so they need transmit L-band signal via optical fiber.

Challenge

In CCTV, there are 19 antennas located in 3 positions. Position A is the roof top of main building, there are 16 receive only antennas in position A. Position B is the roof top of service building, there are 2 transmit/receive antennas in positon B. Position C is an open ground, there is one transmit/receive antenna in the open ground. The signal center is in the main building.
They need to transmit all RF signals from 19 antennas to the signal center. And they want to transmit 4 RF signals from signal center to positon B and 2 RF signals from signal center to positon C.
The distance between A and B/C is more than 500meters. So they need some RF over fiber products to transmit RF signals more than 500meters.
Also they need a LNB powering system and some L-band active distribution amplifiers without any loss.

Solution

As a DEV local partner in China, we strongly recommend DEV products to China Central Television, which is the most important customer for us. We designed the best technical and commercial solution for the project.
We use DEV 7113 Intelligent Optribution Chassis, plus DEV 7233 Top Performance Optribution Transmitter and DEV 7333 Top Performance Optribution Receiver for the need of RF over fiber.
We use DEV 8120 Managed LNB Powering system and DEV 8122 for the need of LNB power supply.
We use DEV 2183 2*1:8 Distribution Amplifier for the need of RF signal distribution without loss. 

Schematic of the Application

Schematic of the Application

In position A

  • Use 32 RF cables to transmit 32 L-band signals from 16 antennas to the signal center.

In position B

  • Use DEV 8122/4 to provide power supply for 4 LNBs on 2 antennas
  • Use DEV7113, DEV 7233 and DEV 7333 to transmit L-band signals via optical fiber between position C and the signal center

In position C

  • Use DEV 8122/2 to provide power supply for 2 LNBs on 1 antenna
  • Use DEV7113, DEV 7233 and DEV 7333 to transmit L-band signals via optical fiber between position C and the signal center

In the signal center

  • Use DEV 8120 and 16*option2 LNB Powering Twin Modules to provide power supply for 32 LNBs on 16 antennas
  • Use DEV7113, DEV 7233 and DEV 7333 to transmit L-band signals via optical fiber between the signal center and position B or C
  • Use 19*DEV 2183 2*1:8 Distribution Amplifiers to split 38*L-band signals come from all antennas
  • The L-band signals will be sent to IRD, matrix and spectrum analyzer etc.

Benefits for the Customer

DEV’s products can meet all RF requirement for this project. DEV can provide the best solution against solving all the challenges.

By using DEV solution, the customer can benefit from

  • Managed LNB powering system for all LNBs on all antennas
  • Reliable RF over optical fiber transmit system for satellite uplink and downlink
  • RF signal distribution without any loss
  • Minimum rack space required with compact rack unit design

What our customer says:

As a DEV local partner in China, we strongly recommend DEV products to China Central Television, which is the most important customer for us. We designed the best technical and commercial solution for the project. It is always a pleasure to work with the DEV staff members as they are friendly, supportive and always reliable in terms of delivery time and performance of products. We at Times Sage rely on DEV solutions since many years. They never disappointed us.
Mr. Zhang Hongying. Deputy General Manager of Wireless Communications Division, Times Sage (CSS-Group)

Conclusion

DEV, as the world´s leading provider of end-to-end RF transmission systems designed, developed and manufactured in Germany, help making a good, effective and reliable solution for upgrading of master control system in CCTV. The solution with DEV 8120/8122/7113/7233/7333/2183 provides the customer a flexible and reliable system.

About Times Sage/CSS Group:

Examined by Asia Brand Assessment System-ABAS, CSS Group is highly appraised in its market performance, development potential, product quality and profit level. The branch company-Times Sage (Beijing) Technology Limited is awarded as Innovation Champion of Chinese Brand by its advanced technology and continues innovation spirit. Mr. Andrew Lo, president of CSS Group, won the Top 10 Leading Personality of Asia Brand Award for his dedication and leading glamour in broadcast and television field.

The case study as download click here.