Insat 4A at 83.0°E packet Tata Sky Analysis
Insat 4A at 83.0°E-footprint in KU band-TATA Sky: HF system_theoretical footprint ...
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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
elevation angle : 8.8°
HF system theoretical footprint point measurements
a, PF Prodelin 3.7 m
b, dxsatcs waveguide line - coverage area - a, Lučenec-Slovakia , centr. Europe
c, LNB Norsat 4206 CF Asia , Middle East , Africa , Europe b, Latitude : 48.33°_Longitude : 19.72°
Date of measurement : 1.5.2010 / the period of time 7.00 - 18.30 /
- Weather conditions : sunshine -
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Insat 4A at 83.0°E-footprint in KU band-TATA Sky : spectral analysis
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- LIVE frequency spectrum of the vector H in the range from 10 970 MHz to 11 670 MHz -
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Insat 4A at 83.0°E : PACKET TATA Sky India > LIVE spectrum in Central European region
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Insat 4A at 83.0°E-footprint in KU band-TATA Sky : full range of the spectrum of vector H
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Insat 4A at 83.0°E-footprint in KU band-TATA Sky: first part of the spectrum>10 970-11 170 MHz
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Insat 4A at 83.0°E-footprint in KU band-TATA Sky: second part >11 470-11 670 MHz
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Insat 4A at 83.0°E-footprint in KU band: Packet TATA Sky India>defining the status of reception
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--- 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 .
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