Insat 2E/3B/4A at 83.0°E : Technical data

                                                        Packet TATA Sky : 11 670 H TV9 Gujarat     

             Name : Insat 4A - Orbit : 83.0°E - TP : 12C/12KU - Lifetime : from 21.12.2005 - 12 years
       
    

Update : Insat 4A at 83.0°E - footprint in KU band : spectral analysis & measurement results

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Insat 4A at 83.0°E - footprint in KU band : measurements taken in the town of Lučenec / central Slovakia  
                                             geographical location : Latitude: 48.33°  _   Longitude: 19.72°
                                          measurement results are derived from the 3.7 m diameter antenna
                                                                   date of measurement : 1.8 2010
                                                                            elevation angle  : 8.8°     

    Insat 4A spectral analysis_1. part           Insat 4A footprint_theoretical             Insat 4A spectral analysis_2. part 
part of the spectrum :10 970-11 170       Asia , Middle East , Africa , Europe     part of the spectrum :11 470-11 670

                                          Date of measurement : 1.8.2010 / the period of time 13.00 - 15.30 /
                                                                      - Weather conditions : sunshine -
                                                                     - deffining the status of reception -

--- elementary factors of reception in the range from 10 970 to 11 670 MHz ---

1, stable lock for each carrier without locking unstability
2, constantly alternating levels of EIRP flow
3, immediate change in the amplitude of the quality MER measured in time span from 3 to 5 minutes to
achieve a range till +/- 1.5 dB !

the previous factors, I can define the quality of reception :

10 970-11 670 MHz _ depending on the protocol FEC _3/4 and 5/6_ and the threshold levels for the detection
of carrier _MER=4.0 and MER=5.0 dB_the gain margin ranges from MER=0.5 to 4.0 dB > MERp=9+ dB for
transmission to the carrier frequency f=11 010 H and from MER=0-treshold level to 3 dB for all other carriers used
to FEC protocol 5/6 .This means that only the carrier of f=11 010 H did not decrease the level of gain margin below
MER=0.5 dB and in field measurements in the length of the 7 hours I did not identify even one pixelation short-falls
(outages) .On the following frequencies at f=10 970+11 050+11 090+11 130+11 170 with FEC protocol 5/6 I have
done a much lower gain margin and with occasional short-falls (occasional - this word in my dictionary has the
following meaning:for the C at f=10 970+11 050+11 090 _ max 1-5 short-falls in one hour .

elementary factors of reception in the range from 11 470 to 11 670 MHz : constantly alternating levels of gain in
a wide range from MER=0-3+ dB above the treshold level at MER=5 dB with frequent outages .Only to the carrier
at f=11 670 H I have identified an unstable lock .

                                                  TATA Sky : quality peak in time span from 3 to 5 min.
       
                   -- treshold levels for the FEC protocols :  3/4 > MER=4.0+ dB  ___  5/6 > MER=5.0+ dB --
                     

                          Insat 4A at 83.0°E - footprint in KU band : 10 970 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                              Insat 4A at 83.0°E - footprint in KU band : 11 010 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                             Insat 4A at 83.0°E - footprint in KU band : 11 050 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                               Insat 4A at 83.0°E - footprint in KU band : 11 090 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                               Insat 4A at 83.0°E - footprint in KU band : 11 130 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                             Insat 4A at 83.0°E - footprint in KU band : 11 170 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                                  Insat 4A at 83.0°E - footprint in KU band : 11 470 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                            Insat 4A at 83.0°E - footprint in KU band : 11 510 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                              Insat 4A at 83.0°E - footprint in KU band : 11 550 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                              Insat 4A at 83.0°E - footprint in KU band : 11 590 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                             Insat 4A at 83.0°E - footprint in KU band : 11 630 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

                              Insat 4A at 83.0°E - footprint in KU band : 11 670 H Packet TATA Sky India
            LIVE spectral analysis                              measurement result                      Videoguard box : relative quality

Insat 4A at 83.0°E - footprint in KU band : Packet TATA Sky_TV table

Insat 4A at 83.0°E-footprint in KU band-Packet TATA Sky: relative quality

                      11 010 H                                                   11 590 H                                                  11 670 H

Insat 4A at 83.0°E-footprint in KU band-Packet TATA Sky:video presentation

    
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Insat 4A at 83.0°E-footprint in KU band-Packet TATA Sky : update prepare

                          
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Insat 4A at 83.0°E-footprint in KU band-Packet TATA Sky : snapshots