What is DD DIRECT DTH SERVICE ?
Doordarshan, the national broadcaster in India, at present has a network of more than 1400 transmitters spread throughout the country and its signals are available to about 90% (DD1) and 43% (DD-News) population of country. The prime duty of any national public service broadcaster is to make the programs of national importance available to all its people and nations. It was estimated that the coverage of remaining 10 % population with terrestrial (single channel) broadcast would cost enormously. Besides that, setting up of terrestrial transmitters in the uncovered areas would have taken a number of years (10 to 15 years). Also, operation of terrestrial transmission would have required a huge manpower (a few thousand persons).
With the fast developments taking place in Satellite Broadcasting, it is but natural that Doordarshan has also come up with an alternative to get the required reach with an alternate technology option “Ku-band broadcasting” which is envisaged for the coverage of remaining populations. This is a much cheaper and economical option as compared to the coverage through Terrestrial transmitters.
Ku-band transmission will provide coverage in all uncovered areas including remote, border, tribal, hilly and inaccessible areas in one go within a short time. With this coverage, the national broadcaster proposes to meet its obligation of covering the whole nation and its people not only with national channels, but also make available popular Doordarshan and some other free-to-air channels on its platform. In order to meet its obligations, it has also been decided that 10,000 receive systems (Dish and Set Top Box) would be provided free of cost at public institutions like Anganwadis, Schools, Public Health Centers, Panchayats, Youth Clubs, Cooperative Societies etc. in the uncovered areas.
It may be pertinent to mention here that incidentally Doordarshan would be starting DTH service with Ku band broadcasting as not only uncovered areas are covered with its commencement, but also the whole country gets multi-channel service in one stroke. The signal will be available at each home directly without the use of any cable etc. and one will be able to receive the programs with the help of a small Receive segment.
Presently the DD DIRECT+ is envisaged to telecast 50 free-to-air TV channels (containing both Doordarshan and private channels) Satellite Earth Station for uplink of signals has been set up in Delhi. Honorable Prime Minister of India inaugurated the service on 16/12/2004. The high power Ku-band transponders of Indian Satellite INSAT-4B at 93.5º E are being used for hosting the DD DIRECT+ services.
How to receive DD DIRECT DTH SERVICE ?
Receive System includes a small satellite dish (which is an antenna for receiving a satellite broadcast signal); a digital integrated receiver/decoder (IRD) also called STB (Set Top Box), which separates each channel and decompresses and translates the digital signal for viewing over a television; and a remote control.
Investment on the part of subscriber for receiving DD-DIRECT DTH SERVICE signal is only one time on receive system and no recurring monthly expenditure will have to be incurred by the viewer. As compared to other DTH systems, where a huge activation fee and a monthly subscription fee is charged, the DD DIRECT+ can be received without payment of any activation fees. Price of a receive system is less than Rs 3000/-. Once the technology gets induced the demand for the receive systems will increase and the prices would further comedown.
Installation of the Receive System
Installation of the System is very easy and does not take much time. However the viewer has to take the services of skilled technical personnel to get the dish installed and oriented towards the Satellite, which is required to be carried out before the system starts receiving the DD DIRECT+ signals. Tuning/configuring the STB also is required to be done initially. Tuning procedure is normally supplied by the manufacturer along with the STB.
Some of the parameters which are required to be fed to the IRD are mentioned therein and are also given under the heading 'Satellite in use'.
Satellite in use
A powerful Satellite INSAT-4B is being used to uplink the DD DIRECT+ signal. Reception of the signal has been checked to be available throughout the country.
Main features of the satellite are listed below:
- Orbit type: Geo-synchronous
- Orbital location: 93.5° E
INSAT-4B is the latest Geo-synchronous Satellite of INSAT series with high power Ku Band Transponders launched by ISRO in the beginning of the year 2007. Service parameters of the bouquet of channels, which have been put into operation at present, are as follows:
- In the beginning Doordarshan DTH started with three streams of 20 TV Channel, which is now upgraded to 5 streams of DTH bouquet, capable of transmitting 50 TV channels.
To install the channels following procedure is to be followed which is only suggestive. Viewers are advised to consult the installation manual supplied with STB or contact the nearest STB Dealer
1. Satellite Name:
- Go to Installation menu or setup program from remote.
- Select Satellite Edit menu.
- Select Add New Satellite menu.
- Select Sat Name Edit menu.
- Enter Satellite Name as INSAT- 4B.
- Enter Satellite Longitude as 93.5o E
- Press Exit
2. LNB Configuration
- Go to LNB Configuration menu. Ensure that satellite selected is INSAT- 4B only.
- Set LNB Types as Universal.
- Set LNB Power on.
- Press Exit
3. Transponder (TP) Edit:
- Go to Transponder Edit menu. Ensure that satellite selected is INSAT- 4B.
- Select Add New TP menu.
- Enter TP Frequency as 10990 MHz.
- Select Symbol rate as 27500 ksps.
- Select Polarization as Vertical.
- Select Scan as FTA.
- Press OK.
- ‘22K’ OFF*
- ‘Disc. Equal’. Off
After filling the above values Go to ‘search’
The new TV and Radio services will be displayed. Similarly add all other four TPs by entering the frequency, symbol rate and polarization as given in Table above
Note: – The above-mentioned steps may be in, different order in some of the STBs.
In case there is any difficulty, viewers are advised to contact the nearest LPT (Doordarshan Relay Center) or STB Dealer.