Astra 2D at 28.2°E-2D North footprint-sat dx : Freesat-ITV-BBC-Sky & spectrum analysis of the V vector
ASTRA 2D at 28.2°E - UK SPOT BEAM
Archived measurement results from the period from 2006 to 2012
by Roman Dávid_founder of Think-Tank
►Astra 2D at 28.2°E-Freesat-ITV-BBC-Sky : footprint , measurement point , HF system ...
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Astra 2D at 28.2°E - 2D North SPOT : measurements taken in the town of Lučenec / central Slovakia
a, geographical location : Latitude: 48.33° _ Longitude: 19.72°
b, measurement results are derived from the 3.7 m diameter antenna
c, date of measurement : 26.2.2011
d, elevation angle : 33.9°
e, weather conditions : sunny and clear sky
f, air temperature : from - 2 at 7.00 o'clock to +5 °C at 12.00 o'clock
g, altitude : 185 m /asl
h, installation period and aggregation measured data : from 07.00 a.m to 18.00 pm
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--- Astra 2D at 28.2°E-sat dx & footprint : 2D North ---
current status in EIRP levels in East European area : Prevailing local reception disparity in quality in terms of choice
of the V or H vector
- in case of receiving satellite Astra 2D in East European level, I can define the following an elementary rule : without
the initial measurements at the antenna installation is not possible to correctly define (with a high degree of probability) the
required diameter antenna to a stable reception of a TP in the plane waves H or V .
- the smallest antenna diameters for unstable carrier lock (in units of minutes to hours), depending on the geographical location
of the antenna installation location in Eastern Europe :
--- for packets broadcast in vertical polarization ---
in my point measurements : unstable from Dmin=140 cm and stable from Dmin=220-240 cm ( V pol sidelobe )
in other Eastern European reception areas : Dmin=90-270 cm
--- for packets broadcast in horizontal polarization ---
in my point measurements : unstable from Dmin=340 cm ....and stable form of reception for all TP from Dmin=???
in other Eastern European reception areas : Dmin=180-500 cm
click for enlarge
(astra 2D footprint image source : SES Astra S.A )
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--- Astra 2D-sat dx : HF system , geographical location of measurement ---
- with distance from the zone Beam peak, decreasing the probability that a stable form of reception will be sufficient for
the antenna diameter, which defines the broadcaster in this footprint > 75,90,120 cm ...
installed HF system theoretical footprint research point
a, PF Prodelin 3.7 m a, state : Slovak republic / Europe
b, dxsatcs waveguide line b, town : Lučenec
c, UNI LNB : NF=0.4-0.6 dB c, altitude : 185 m / asl
d, cable lenght : 40 m d, geo. location : 48.33°_19.72°
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Astra 2D at 28.2°E-sat dx-Freesat-ITV-BBC-Sky : spectrum analysis No.1_10 729-10 936 MHz
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--- Number of measurement and time frame : No.1 - 8.30 - 9.00 am ---
- carrier with the highest quality within a defined timeframe : 10 848 V - MER=12.1 - 12.5 dB _ ChBER=8x10-6>2x10-5
- carrier with the lowest quality within a defined timeframe : 10 906 V - MER=11.4 - 11.7 dB _ ChBER=8x10-5>2x10-4
- range of peak amplitude defines the level of permanent oscillation -
click for enlarge
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--- LIVE video preview No.1 - 8.30 - 9.00 am : 10 719 - 10 936 MHz ---
--- current status of quality within a defined timeframe : spectrum analysis,carrier lock,NIT ---
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Astra 2D at 28.2°E-sat dx-Freesat-ITV-BBC-Sky : spectrum analysis No.2_10 729-10 936 MHz
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--- Number of measurement and time frame : No.2 - 10.30 - 11.00 am ---
- carrier with the highest quality within a defined timeframe : 10 848 V - MER=12.5 - 13 dB _ ChBER=1x10-6>8x10-6
- carrier with the lowest quality within a defined timeframe : 10 729 V - MER=11.6 - 11.8 dB _ ChBER=2x10-5>4x10-5
- range of peak amplitude defines the level of permanent oscillation -
click for enlarge
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--- LIVE video preview No.2 - 10.30 - 11.00 am : 10 719 - 10 936 MHz ---
--- current status of quality within a defined timeframe : spectrum analysis,carrier lock,NIT ---
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Astra 2D at 28.2°E-sat dx-Freesat-ITV-BBC-Sky : spectrum analysis No.3_10 729-10 936 MHz
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--- Number of measurement and time frame : No.3 - 12.30 - 13.00 pm ---
- carrier with the highest quality within a defined timeframe : 10 848 V - MER=12.9 - 14 dB _ ChBER=0>4x10-6
- carrier with the lowest quality within a defined timeframe : 10 729 V - MER=11.6 - 11.8 dB _ ChBER=1x10-5>4x10-5
- range of peak amplitude defines the level of permanent oscillation -
click for enlarge
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--- LIVE video preview No.3 - 12.30 - 13.00 pm : 10 719 - 10 936 MHz ---
--- current status of quality within a defined timeframe : spectrum analysis,carrier lock,NIT ---
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Astra 2D at 28.2°E-sat dx-Freesat-ITV-BBC-Sky : spectrum analysis No.4_10 729-10 936 MHz
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--- Number of measurement and time frame : No.4 - 14.30 - 15.00 pm ---
- carrier with the highest quality within a defined timeframe : 10 819 V - MER=12.7 - 13.3 dB _ ChBER=0>4x10-6
- carrier with the lowest quality within a defined timeframe : 10 729 V - MER=11.6 - 12.0 dB _ ChBER=1x10-5>4x10-5
- range of peak amplitude defines the level of permanent oscillation -
click for enlarge
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--- LIVE video preview No.4 - 14.30 - 15.00 pm : 10 719 - 10 936 MHz ---
--- current status of quality within a defined timeframe : spectrum analysis,carrier lock,NIT ---
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mail : roman.david@dxsatcs.com