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ความรู้พื้นฐานการรับส่งสัญญาณดาวเทียม

Oct 10, 2015

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Sook Sabuy

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  • 6 -

    . ( Arthur C. Clarke )

    .. 2488 ( Equator ) 35,800 24 2500

    ( Uplink ) ( Downlink )

  • - 7

    1. 2. 3.

    7 2542

  • 8 -

    1. 2. 3. 4.

    .. 2542

    1 [1 Transponder 1TP] 2 1 [1 Transponder 1TP ] 12

    [1TP]

    ( 1 Transponder 6 ) [1TP] 2 3 3x12 = 36 36

    [1TP] 12 6 1 6 12 5 1

    1TP = 12 6 12 1 = 5

  • - 9

    (GMM, RS) 4-5

    Direct to home [DTH]

    .. 2547

    11 .. 2545

    9 .. 2547 3 5 7 2548 C-Band ( iTV ) website PSI CHANNELhttp://www.psichannel.com MVTV http://www.mvtv.co.th http://www.sabaidee.tv/th/ GangCartoon http://www.gangcartoon.net 3 http://www.thaitv3.com 5 http://www.tv5.co.th 7 http://www.ch7.com 9 http://modernine.mcot.net/ NBT http://nbttv.prd.go.th/th/ http://www.thaipbs.or.th/ TGN http://www.thaitvglobal.com/

    FanTv http://fantv.gmember.com/ BangChannelhttp://www.bangchannel.com/ ActsChannel http://www.exact.co.th/ GreenChannelhttp://www.green-channel.tv/ http://www.dltv.th.org/http://www.lyngsat.com/asia.htmlhttp://www.satcodx.com/eng/http://www.thaicom.net/index-thai.html

  • 10 -

    50

    1. 2. 3. 4. 5.

  • - 11

    .

    ()

    100

  • 12 -

    Bang Channel 24

    Green Channel 24

    Fan TV 24

    Acts Channel 24 .

    GangCartoon

    PSI CHANNEL 24

    D1.3R LNB X1

    YOU CHANNEL 24

    24

  • - 13

    MIX Channel 24

    MV Hit Station 24

    MV H+

    Star Channel

    Bangkok Today

    MV5 Channel

    MV VARIETY

    MYTV

  • 14 -

    Supper Cheng

    TenTV

    TV POOL

    AMATV

    D Station

    Faikham

    TGN ( Thai Golbel Network )

    S CHANNEL

  • - 15

    SBBTV ()

    DMC

    TV MUSLIM

    SBT

    P5 TV

    ACE

    PEAK

  • 16 -

    5

    7

    9

    NBT

    3

    MCOT1

    MCOT2

  • - 17

    ?

    [Equator] ( )

    1. 2. 3. ()

  • 18 -

    () . .

    35,800

    (Foot Print)

  • - 19

    [BEAM] ()

    KU-Band C-Band

    " "[footprint] = FP

    Ver Hor

  • 20 -

    [ POLARIZED ]

    () [Bandwidth = BW ] [Bandwidth] C-Band 480 MHz [ Trans-ponder ] TP Bandwidth 40 MHz = 480/40 = 12 12 [12Transponders]

    C-Band Thaicom 3720 - 4160 MHz [H] Hor3740 - 4180 MHz [V] Ver

    KU-Band BW 480 MHz KU High & KU Low

    11,700 -12,180 = 480 MHz= 480/40 = 12 12

    Hor 11,720-12,160 MHz Ver 11,740-12,180 MHz

  • - 21

    Vertical Horrizontal V H () KU-BandFreqency and Polarization

    11,720 H11,740 V

    24 TP

    V H

    LNB C/KU-Band C-Band KU-Band

    [Antenna] C-Band

    LNB C/KU-Band ( LNB )

    KU-Band

    C-Band

  • 22 -

    C-Band KU-Band

    EIRP [Effective Isotropic Radiated Power] EIRP dBW [decibel Watt ]

    EIRP C-Band 39 dBW 38 ,37 36 32 dBW

  • - 23

    EIRP KU-Band KU-Band EIRP C-Band C-Band 52 dBW 51, 50, 49 47 dBW

    38 dBW ?

    dBW (M) EIRP 38 dBW 38 () 45 1.8 180

    32 dBW 32 3.0- 3.7 3.4 340

    (Diameter) C-Band

  • 24 -

    KU-Band KU-Band Receiver Antenna Diameter KU-Band 52 dBW 52 45-60 50 50

    EIRP 30% 0.7

    50 x0.7 = 35 35 C-Band180 x 0.7 = 126 126

  • - 25

    ?

    (Loss) KU-Band TRUE 35 90 35 90 ( 90 KU-Band )

    C-Band KU-Band C-Band 180 0.7 126 KU-Band

    C-Band 130 ? C-Band

    9 38 dBW MVtv , FTV 30 dBW 120 9 MVtv, FTV ( 78.5 E 130 ) EIRP 45 dBW 90

    130-150 ETEG III 170 (ETEG III )

  • 26 -

    KU-Band (35-75)

    KU-Band KU-Band True Vision , ASTRO

    C-Band KU-Band C-Band C-Band BBC / TV5 / NHK / DW 60 350

    C-Band C-Band

    C-Band KU-Band

  • - 27

    ITU (Internation Telecommunication Union) Longtitude

    Longtitude

    2 78.5 E 120 E

    [Longtitude] 97 - 106 E [Latitude] 5-20N

    = Latitude ( ) = Longtitude ( ) = Equator ( )

  • 28 -

    97-106 E & 5-20 N ?

    Equator [N] [E]

    Intelsat 7&10 68.5 EABS1 75.0 EThaicom 2&5 78.5 EThaicom KU 78.5 EInsat 2E 83.0 ENSS6 (KU) 95.0 EAsiaSat 2 100.5 E

    AsiaSat 3 105.5 ETelkkom 1 108.0 EPalapa C2 113.0 EChinasat 6 B 115.5 EAsiaSat 4 122.0 EApstar 6 134.0 E

    97-106 E 97-106 5-20 N 5-20

  • - 29

    (Equator) ITU

    78.5 E 78.5 E

    ( [Elevation] EL [Azimuth] AZ)

  • 30 -

    2 1 (ELEVATION ANGLE) : EL

    (AZIMUTH ANGLE) : AZ

    : Thaicom 2/5 . (Latitute) 13.4 (Longtitute) 100.3 3, 5, 7, 9, 11, TITV, TGN, MVTV 78.5

    = (Latitute) = 13.4 E = (Longtitute) = 78.5 - 100.3

    = -21.8 R = 6,370 KM.H = 35,680 KM.

    R 6,370 kmR+H = 6,370 km + 35,680 km = 0.1515

    EL= tan-1 {[(COS 13.4 ) (COS 21.8 )] - 0.1515} / { 1 - (COS2 13.4 ) . (COS2 21.8 )}= tan-1 (0.7517 / 0.429)= tan-1 (1.75)= 60.26

  • - 31

    90 = 90 - 60.26 ( EL) = 29.74

    AZ = tan-1 (tan - 21.8 / sin 13.4 )= tan-1 (- .4 / 0.232)= tan-1 (- 1.724)= 59.89

    180 = 180 + (59.89) (AZ) = 239.9

  • 32 -

    2. (Receiver)

    ( BONUS, O2,S-STAR S-3, S-5, S-7)

    1 . 100.3 2 . 13.4 3 78.5 4 , 5 (Azimuth) = 240.0 6 (Elevation) = 29.7

    Elevation [ EL ] Azimuth [AZ]

  • - 33

    AZ,EL Asiasat 105.5E

    AZ,EL . 78.5E

    AZ,EL . 78.5 E

    AZ, EL . Asiasat 105.5E

    Dmove EL AZ 180 Dmove Move

    AZ,EL . 78.5 E

  • 34 -

    AZ &EL

    1.

    2. 5. EL 29.7

    3.

    Angle

    4.

  • - 35

    3. ()

    ()

    1. Compass

    2. 240 N( )

    4.

    5. /

    6. N

  • 36 -

    ( LNB ) C-Band

    2 C/KU-Band

    ?

    3 1. Satellite Dish 2. LNB (Low Noise Block down convertor) 3. Receiver

  • - 37

    1. , , ( )

    2. , ( )

    LNB ( )

    F = (Focus Point) D = ( Diameter )H = (Depth )

    F= D2/16 h

    170 29 ?

    F= D2/16 h F = (170 x 170) (16x29) = (28,900) (464)

    = 62.28 1. 130 -150 150 170 2. C-Band KU-Band 2

    LNB ( Low Noise Blockdown Converter )

    ( 950-1750 MHz ) LNB RG-6

    LNB

    1. LNB C-Band 1 ( X1, C1 )

  • 38 -

    2. LNB C-Band 2 ( C2A ) 2

    3. LNB C& KU-Band 2 ( C/KU ) C-Band KU-Band

    4. LNB KU-Band ( K3 )

    LNB

    LNB C-Band 3.4 - 4.2 MHz IF

    RF 3625 MHz OSC 5150 5150 - 3625 =1525 MHz 4120 MHz 5150 -4120 = 1030 MHz

    KU-Band IF

    KU-Band 2 LNB IF 950 2150 MHz

    10700 -11700 MHz 11700 -12750 MHz

    10800 OSC 9750 MHz IF 1050 MHZ RF 12000 MHz OSC 10600 MHz IF 1400 MHz IF

  • - 39

    RF 12000 9750 =12000 - 9750 = 2250MHz Receiver

    LNB KU-Band

    H V 10700-12750 MHz SW V/H

    13v V 18v H

    KU-Band 10700MHz Receiver 0 KHz 0 Hz OSC KU High Receiver 22 KHz

    22 KHz IF

    Receiver LNB( OSC) LNB

    C-Band 9750 5150

    KU-Band 12500 9750 LNB

  • 40 -

    LNB LNB C/KU-Band LNB C-Band KU-Band C/KU

    LNB

    5150 MHz 9750 MHz10600 MHz 10750 MHz11300 MHz

    (Receiver )

    LNB RF ( Radio Frequency )

    2 1. BONUS, O22. Dmove()

    FTA FTA+Scramble

    1. FTA ( Free to air ) S-7, S-5 S-3

    2. FTA + Scrambled ( ) BONUS, O2 Neotion

    ETEG

    130

  • - 41

    1. LNB Tuner & QPSK

    2. Tuner & QPSK CT213 QPSK Demodulator ,TS Demux , MPEG-2 , A/V Decoder, OSD, TV Encoder CPU Flash , SDRAM

    3. CT213 Neotion CA

    4. CT213 2

    4.1 ( CVBS ) Video

    4.2 Audio DAC Audio Amp L R

    5. RFModulator RF

    SR [Symbol Rate]PID [Program Identification]FEC [Forward Error Correction]A [Audio]V [Video)MPEG [Moving Picture Expert Group]FTA [Free to Air]QPSK [Quadrature Phase Shift Key]TDMA [Time Divetion Multiple Access]DisEqc [Digital Satellite Equipment Control]PCM [Pulse Code Modulator]SCPC [Single Channel Per Carrier]MCPC [Multi Channel Per Carrier]

    LNB & Receiver Software

  • 42 -

    OTA OTA Over-The-Air OTA

    RS232 RS232 1

    OTA PSI OTA - . PSI 3 OTA Dfix OTA , BONUS O2

    OTA -

    .. 2498 52 ()

    OTA

  • - 43

    ( )

    OTA OTA (Content Provider), (Installer) (End-user) OTA

    OTA

  • 44 -

    BONUS

    BONUS AUTO OTA() Power Stand by ( 24 dL ) 3

    POWER ( ) Stand by

    Dfix OTA

    1. MV 2

    2. OK OTA

    3. ( 5 )

  • - 45

    SAT-MAIL

    SAT-MAIL AUTO OTA () BONUS (SAT-MAIL) 3

    A. BONUS OTA ""

    B. SAT-MAIL SAT-MAIL 9 001122789 SAT-MAIL www.satmail.tv/sms/

    24 .

    C. CAS (Conditional Access System) () (Content)

  • 46 -

    Pay Per View "" (Voucher) ( 3,5,7 MVTV)

    (CAS System) (Code) 1. ECM (Entitle Control Message)2. EMM (Entitle Management Message)

    ECM 1 SAT-MAIL ECM CW (Control Word) ECM SAT-MAIL CW ECM (Bandwidth)

    EMM 2 ECM EMM SAT-MAIL EMM

    BONUS - ECM- EMM- OTA - OTA (SMS)- OTA (Firmware)- OTA

    (Coldboot) 45 (CPU) BONUS 133 MHz (Dfix OTA) 50 MHz 2

    (Free to Air) 30-50 MHz

  • - 47

    1. (SMS) 1.1. SAT-MAIL Address 9 *

    2

    1. 2 08-1122-0078 08-1122-0079

    SAT-MAIL

    2. 2.1 SAT-MAIL Password

  • 48 -

    1. (Gravity)- (Orbital Plane)

    - 0.1 (Footprint)

    2. (Solar Flares)-

    100 10

    - ,

  • - 49

    -

    - UV

    3. (Leonids)- - (Cornet Temple-Tuttle)

    33 2541 1 . 1 ..

    - -

    - 1 0.007%

    - 5

    4. (Eclipse)-

    (Solar cell)

  • 50 -

    -

    - 45

    - 72

    5. Sun Outage-

    - Sun Outage ( SunOutage http://www2.thaicom.net/sed/index,html)

    - Sun Outage 2 ( )

    www.thaicom.net

    01-basic.pdf01-basic2.pdf