TELECAST TECHNOLOGY

MMDS System description;

1.  System bandwidth: 200M (2500-2700M, or 2100-2300 M or2300-2500M)

2.       If choose QPSK modulation mode, every 40M bandwidth channel can transmit one data package, and each data package can compress 16 programs. So 1-80 TV programs could be transmitted in the 200M bandwidth.

If choose QAM modulation mode, every 8M bandwidth channel can transmit one data package, and each data package can compress 8 programs. So 1-200 TV programs could be transmitted in the 200M bandwidth.

3.       If the transmitting point is high enough, it can cover omni directional 50-100Km directly。

4.       After being multiple relayed, the signal can be transmitted to more than 400Km.

5.       The system can be conveniently upgraded to 2WAY MMDS (TRIPLAY PLAY SYSTEM), so as to conduct more business to increase the revenue.

6.       The transmission can be point to point, point to multipoint or point to face.

7.       The system can transmit SD and HD digital TV programs simultaneously, and the image is much clearer.

8.       The subscriber must use STB and SMART CARD to receive the signal, so it is very convenient for operator to manage the charges.

9.       All Head-end equipment can be accessed into NMS for software management, and the whole system is controlled and managed by CAS and SMS.

10.   The system has the function of PPV (PAY- PER –VIEW), PPT (PAY- PER –TIME), EMAIL, OSD and EPG

11.   If choose QPSK modulation mode, the STB not only can receive MMDS signal, but also can receive free satellite TV programs.

12.   The transmitter and CAS&SMS support remote monitor and control.

13.   STB supports online upgrading.

14.   The subscriber can use scratch card (telephone voice recharge system and short message recharge system) to recharge.

How to require design and quotation

Telecast will be happy to help you define an MMDS system to meet your special requirements.

1. How many TV programs would you like to broadcast? 24 PAL or 30 NTSC at most

2. How high is the transmitting point? That is, the altitude of the transmitting point plus the height of the building plus the height of the tower. The higher transmitting tower, the more signal coverage.

You had better send a picture of the tower to us, especially the picture of the position where the antenna may be installed, as well as the dimension of the supports, so that we can design the accessories of the antenna.

3. What is the distance from the studio to the top of tower?

Because we want to know how long the cable will be used from the studio to the transmitting antenna. If the distance is over 150m, you should use optical fiber or a wireless point to point link system (STL).

4. What is the available frequency band? Is it 2500-2700MHz or other special?

2500-2686MHz is the standard frequency band that international organization ITU has assigned to radio and TV transmission. Generally, we use this frequency band. But if this frequency band has been occupied, you can choose 2100-2300MHz or 2300-2500MHz.

No matter what frequency to use, you must ensure that no one use the same frequency in the same area. In other words, you should get frequency license from your government.

5. What is the radius of the coverage? For example: 30KM or 50KM? This is the distance from the transmitting point to the furthest receiving point.

6. What is the angle（width）of the coverage area? 90 or 180 or 360 degree omni-directional?

This will determine the choice of antenna. The narrower transmitting angle, the higher gain antenna can be used. Thus, you also can use a lower power transmitter to reduce the system cost.

Therefore, you’d better provide the map of the coverage area or the name of the city.

7. Please try your best to offer us the parameter of the programs which are received from the satellite, just like the DOWN FEQUENCY, SYMBOL RATE, FEC and WHICH CAS. You can get these parameters from the website: www.lyngsat.com.

  If not all programs are from satellite, please tell us the numbers of satellite programs and local analogue programs (require MPEG encoding)