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Trouble Shooter

Tracksat.com offers to its valued customers, this precious service. If you have any queries about any thing related to the Satellite World, you can send your queries to : dishtech@tracksat.com
November 2002
 


Q.1 : I am a regular reader of Dish Channels would you kindly tell me if MPEG-2 is equal to DVD Quality Picture or not?

Ans: Yes, DVD's and Digital Satellite Broadcasting both utilize MPEG2 digital compression. However, MPEG2 is a very flexible standard and provides for different levels of compression. The higher the compression, the poorer the picture, but the video can be transmitted over much smaller Bandwidth. This fact is often utilized by satellite broadcasters to broadcast their channels, using a smaller Bandwidth on the transponder thus saving them money, but yielding a poorer picture. You would have observed that some digital channels provide a better picture quality than others. DVD does not use the very high compression ratios employed by some satellite broadcasters. As a result, DVD video quality is better than most digital satellite broadcasts.




Q.2 : Trouble Shooter is a good way to guide, I would like to know whether APNET in KU BAND is Analogue or Digital?

Ans: APNET is broadcasted as a Digital, Free to air channel, from the INSAT 2E satellite, located at 83 deg East. It is broadcasted at 11,575 MHz, SR 2222 & FEC 3/4.




Q.3 : What is the standard frequency of a KU Band LNB and what is universal LNB?

Ans: The KU Band actually used for down linking spans of a wide range of frequencies viz. 10.7 GHz to 12.75 GHz. 1 GHz = 1,000 MHz. This wide range of KU Band frequencies cannot be handled by a single local oscillator frequency. Initial KU Band reception was at 10.7 GHz to 11.8 GHz. The LNBs then utilized a Local Oscillator of 9.75 GHz. KU Band LNBs today effectively split the KU band into 2 frequency segments and utilize separate local oscillators for each of these frequency segments. As an example, the COLORADO Universal LNB receives satellite transmissions from 10.7 GHz to 12.75 GHz. For the lower frequency band, the local oscillator operates at 9.75 GHz. For the upper frequency band, the local oscillator operates at 10.6 GHz.




Q.4 : What is the frequency and other parameters of Asianet and Doordarshan’s Malayalam channel? Are the other Malayalam channels in a digital format?

Ans: Asianet has indicated that in the long term it plans to stop relay of the channel on the analog frequency. Currently, it is available on the INSAT 2E satellite located at 83 degrees East at 3643 V; SR 19,531; FEC 3/4. The Doordarshan Malayalam channel is available both as an analog and digital channel on the INSAT 3C satellite at 74 deg. East. The analog frequency is 3904, Vertical polarization, Free to air. The digital frequency is 3919, Vertical polarization, SR 5000, FEC 3/4 FTA. Looks like you will have to invest in a Digital satellite receiver, soon, since most channels are now shifting to a digital mode. Fortunately, prices of digital satellite receivers have crashed, and they are available at very attractive prices.




Q.5 : What is a fiber optic amplifier and why is it more appropriate for cable TV?

Ans: A fiber optic amplifier accepts a weak optical input signal, amplifies it and puts out a much stronger optical signal. A 12 dB fiber optic transmitter has twice the optical output of a 9 dB fiber optic transmitter, that receives the combined RF output from head end modulators. The output from a fiber optic transmitter is an optical output that is launched into the optical fiber for distribution. The intensity / strength of the light output from the transmitter is specified in dBmW. 0 dB refers to a 1 mili Watt (mW) light output. 3 dB refers to a 2 mW light output and 6 dB refers to a 4 mW light output. An increase of 3 dB implies double the light output. At the receiving end, ideally, each node must receive an optical input of at least 0 dBm. The optical output launched by the transmitter is lost (attenuated) in the fiber optic cable + at each splice of the cable + at each connector and most significantly at the optical splitters required to distribute the signal from the optical trunk line. This process is quite similar to RF distribution that we are all familiar with for cable TV networks.




Q.6 : I am residing in Dubai and have gone through your current issue. I have not been able to detect ATN world channel kindly tell me its exact parameters?

Ans: ATN World channel has gone off from Thaicom 3 satellite. It is not clear whether it is being shifted some where else or has gone through any parameters changes. According to the updated records, we have checked, there is no information how longer will it remain off.




Q.7 : Dear Editor, I could not find Malayalam channel India vision and Miracle Network. Have they become a pay channel or there is something else. Would you kindly tell me their frequencies and other details for my convenience?

Ans: Dear Reader, we always want to be at top in your service and thank you for writing to us. India vision is not available right now. As it is being modified hence it is going to be re launched in the new year. Miracle Network is a free to air channel on JCSAT 3 (128° East) Freq. 3996 V, clear, SR 22000 FEC 5/6 on Asian beam and another Christian channel “The God Channel” is also available on PAS 10 (68.5° East) clear, 3797 V, SR 3003 and FEC 2/3.




Q.8 : Dear Sir, I am not able to find out CMM Music on 3699H with SR 26667 and FEC ¾ on Thaicom 2/3 (78.5° East). Has it become on pay channel or gone under any other changes kindly give me its details?

Ans: Dear Reader, CMM Music has left these parameters on Thaicom. It has neither gone off nor has become a pay channel and is available on PAS 7/10 (68.5° East). Its frequency is 3778 V, and is free to air with SR 2940 and FEC 3/4 on C beam.




Q.9 : We are not receiving the Tara Marathi channel. Please send some details.

Ans: Tara Marathi has been off the air for the past few days. We are not aware when it will restart again. It is well known that they have been facing problems in the past year.




Q.10 : Has MMA channel gone in a pay mode? It appears as a scrambled, Pay service, on INSAT 2E. I would also like to know why am I having problems with DD-1 reception from INSAT 2E. Please also revert with the new Frequency & Symbol Rate for Doordarshan?

Ans: Yes, MAA has become a Pay channel but it is fluctuating between pay & free at various times of the day. The channel can be contacted through their website (www.maatv.com) for decoders. It is available on a downlink frequency of 3525 V with SR of 24800 and FEC 7/8. Other channels on the same transponder are SPLASH TV, SKY BANGLA, WIN TV and the ASIANET GLOBAL channels. On the INSAT 2E, DD METRO is available as an analog channel on a downlink freq. of 3961V and as a digitally compressed channel on a downlink frequency of 3980V with SR of 5000 and FEC 3/4 on the same satellite. DD 1 is also available on INSAT 2E, analog, on a downlink freq. of 4089 V or as a digital signal at a freq. of 4070 V with a SR of 5000 and FEC 3/4. Star Vijay is no longer available on the INSAT 2E satellite.


 

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