SUN DIRECT DTH on Measat 3 at 91.5°E & the first results of measurements in the Central European scale: satellite identification using ULPC BEACON at f=12 201 V+H , 12 317+12 437 H spectral analysis of packet SUN , 12 317 H MPEG-2/FTA SUN Direct promo ...
SUN DIRECT on Measat 3 at 91.5°E & the first results of measurements in the Central European scale
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a, Measat 3 at 91.5°E-packet Sun Direct : South Asian footprint in the KU band,which defined the broadcaster ...
b, Measat 3 at 91.5°E-packet Sun Direct : Proper identification using satellite beacon frequency_ULPC beacon=12 201 MHz
c, Measat 3 at 91.5°E-packet Sun Direct : spectrum analysis of the vector H & reception quality in the Central European scale
d, Measat 3 at 91.5°E-packet Sun Direct : 12 316 H MPEG-2 / SUN Direct promo & reception quality , NIT ...
e, Measat 3 at 91.5°E-packet Sun Direct : 12 316 H MPEG-2 / SUN Direct promo & snapshots
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___ a, South Asian footprint in the KU band,which defined the broadcaster ___
Measat 3 at 91.5°E - South Asian footprint : results of measurements of the town Lučenec / central Slovakia
geographical location : Latitude: 48.33° _ Longitude: 19.72°
measurement results are derived from the 3.7 m diameter antenna
ground without obstacles in the horizon length to 1000 m
date of measurement : 29.8.2010
elevation angle : 3.3°
Measat 3 at 91.5°E : South Asian footprint in the KU band
coverage area with the possibility of reception,depending on antenna diameter from 180 to 800+ cm , with the highly unstable
and continuously oscillating signal level in the geographical locations with elevation angle less than 10 degrees :
Middle East / D=180-240+ cm - West Asia+East Europe / D=240-360+ cm - Central Europe / D=360-500+ cm
Central Africa / D=600-800+ cm
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High Frequency Unit theoretical footprint point measurements Prodelin 3.7m + dxsatcs waveguide line all research and measurements
DRO LNB Norsat 4206 BF,LO:+/- 250 kHz I carried out at this point
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___ b, Proper identification using satellite beacon frequency_ULPC beacon=12 201 MHz ___
--- vyberám z archívu Think-Tanku dxsatcs.com zo dňa 9.9.2009 ---
Beacon frequency ( maják ) je nemodulovaná nosná, ktorá je stabilne prítomná počas celej životnosti družice na presne
stanovenom kmitočte spravidla rovnakom pre V aj H downlinkové roviny vlnení čo je prípad aj satelitu Measat 3 v pásme KU kde
provajder stanovil beacon kmitočet na f=12 201 MHz pre H_horizontálne aj V_vertikálne vlnenia.Na základe vyššie menovaného
je zrejmé že jednou z funkcií beacon kmitočtu je jednoznačná identifikácia akejkoľvek družice na obežných dráhach čo využívajú
hlavne trackingové systémy sledovania a monitorovania s beacon receivermi v pásme 20-30 GHz. (ovšem sú prípady keď
provader vysiela aj dve beacon nosné v jednom kmitočtovom spektre L,C,KU,KA ... osobitne pre ten ktorý ľavo alebo pravotočivý
vektora vlnenia čo je prípad napr. čínskeho satelitu ChinaSat 9 na 92.2°E , kde identifikačná nosná družice pre cirkulárny LC vektor
je stanovaná na f=12 199 MHz a pre RC vektor na f=11 701 RC ) Ďalšou z funkcií beacon nosnej osobitne ak provajder smeruje
resp.vyťažuje transpondéry v spektre KU a KA pásma do zemepisných oblastí napr. južnej Ázie s neustále premenlivými
poveternostnými podmienkami,čo súvisí s výrazne premenlivým vzťahom útlmová krivka prostredia vs.výsledná kvalita prenášaných
paketov na prenosovej trase Up and Down čo je prípad na tomto mieste definovaného príjmu satelitu Measat 3 s EIRP zväzkom
pásma KU smerovaného do oblasti Južnej Ázie , potom sa dostávame k definícii ďalšej z funkcíí beacon kmitočtu ktorým je okamžitá
kontrola vysielanéhoho výkonu v závislosti od momentálnych poveternostných podmienok na signálnej trase Up and Down z
anglického ULPC čiže Uplink_ Power_Control .
Measat 3 / ULPC Beacon signal in KU band : 12 201 MHz with vertical and horizontal polarization
-identification beacon frequency in the spectrum of H vector of the satellite Measat 3 in the research point: town Lučenec / Slovakia-
12 201>2 V+H : ULPC Beacon frequency-identification beacon frequency in the spectrum of H vector
click for enlarge
12 201 ULPC Beacon + 12 317 SUN Direct _ beacon status in the spectrum of horizontal vector
click for enlarge
___ c, Spectrum analysis of the vector H & reception quality in the Central European scale ___
12 317 > 12 437 H Packet SUN Direct DTH India - spectral analysis of the transponders TP 14KH + 17KH
click for enlarge
--- defining the status of reception ---
12 317 > 12 437 H Packet SUN Direct India : lock the carriers is unstable and non-cyclical oscillates in one second intervals
in a wide range of amplitudes of the quality from MER=5 dB (what is the level of detection for FEC protocol 5/6 ) to MER= 9+dB
which is the fair gain margin of more than MER=3 dB !
___ d, 12 317 H MPEG-2 / SUN Direct promo & reception quality , NIT ... ___
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12 317 H : MPEG-2 / FTA SUN Direct DTH promo channel
___ d, 12 317+12 437 H MPEG-2 / SUN Direct & relative quality ___
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12 317 H : Packet SUN Direct DTH 12 437 H : Packet SUN Direct DTH
___ e, 12 316 H MPEG-2 / SUN Direct promo & snapshots ___
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source of information and published data : Mr. Roman Dávid _ author & founder of Think-Tank http://www.dxsatcs.com/
CZECH & SLOVAK DX SATELLITE CLUB
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Roman Dávid - author & founder
mail : roman.david@dxsatcs.com