I. 1. ' 97 11 T V AT SC DT T B ' 99 5. T V. KBS 8,.,, T V.,. T V 10,. DT T B DT V,, DT V
,, T V, T V. 2. DT T B......,
. T V 1. T V (DT V ) RF (Demodulator ), MPEG- 2 (T ran sport Stream, T S ) T V (DT V Modulat or ), (Driv er Amplifiers ) (Frequency Synthesizer ) Ex citer RF (High Pow er Amplifiers, HPA )., (Regenerativ e Sy st em ). T V,, Corrector, Ex cit er, HPA, RF Front - End,. Corrector (Pre- Corrector )., Corrector, (Pas sive Component s ) RF Front - End 19
,. 2. 2.1 2.1.1 8- VSB 16- VSB QAM CAT V RF, MPEG- T S (T ran sport Stream ). 19.39Mbps, Bi- phase. < 2.1>. 2.1.2 RF,,,. LED. Self, 5V, 12V. ) RF DT V IF (44MHz). A GC(Autom atic Gain Controller ) IF IF VSB. ) S A W RF 44MHz
. 44MHz 6MHz. < 2.1> VHF/ UHF (I 2 C ) BNC- T ype F em ale 50 Ohm Min. - 77dBm av g. - 10 C +50 C SNR OUT : 15dB (T OV ) AT SC SER=2.5 ERR/ SEC BER=3x 10E - 6 : +70dB - 10 C +50 C 50 Ohm From Front - end 75 Ohm T o Modulator / - 10 C +50 C, (0 80% ) / - 30 C +60 C, (0 90% ) / 9 PIN D- SUB F emale 25 PIN D- SUB F emale 110V/ Max. 0.6A, 60Hz 220V/ Max. 0.4A, 60Hz AC110/ 220V ( 15% ), 60Hz LGIC ( ) 482.8( )x44.0x460.0 ) V S B IF (LA 7785M ) IF VSB VSB. FPLL (Frequency Phase Lock Loop ),, AGC VSB.
) (A D C ) VSB VSB (GDC21D003) (10.7MHz) ADC. ) V S B (GD C2 1D 003 ) ADC. 8 MPEG RAM. ) RA M VSB 8 MPEG MPEG Biphase. ) M PE G B iph a s e RAM MPEG Biphase. MPEG- T S VSB. ) VSB,,, LCD RS232C. ) 2 LCD VSB Use. 4 LED (, Sync, Error_Flag, Alarm ). ) DC (+5V, +12V, - 12V ). 110/ 220V A C. ) VSB RF IF /. 9 D- Sub,, (BNC- F emale), MPEG- T S
(BNC- F emale), 29 D- Sub, RF (BNC- F emale),. 2.2 Exciter 2.2.1 Ex citer 44 MHz IF PA < 2.2> < 2.1>. < 2.1> Ex citer 2.2.2 Ex citer, RF Corrector, Synthesizer, Ex citer S/ W, P/ S. RF.
< 2.2> Ex cit er (44MHz) UHF 0.3 ppm/ 3 m onth s 6MHz - 10dBm av g. +2dBm av g. 0.5dB max 40dBc min F c h = 20MHz 60dBc min F c h = 40MHz 2n d Rejection 40dBc min 50Ohm 50ns max ) Ex citer Shelf IF Synthesizer 4 RF Corrector. AGC. ) RF Corrector RF RF Precorrection, HPA IMD. ) Synthesizer Synthesizer Ex cit er Shelf 100 250MHz
. DT CXO 100MHz,. ) Ex citer Ex citer Ex citer Ex citer, Hot Standby Ex citer Shelf Ex citer. 2.3 HPA 2.3.1 HPA DT V Exicier 1mW (0dBm ) RF (150W ). HPA,, 3, 3- W ay 3- W ay. < 2.2>. < 2.2> HPA
, ADS MDS. LDMOS. 2.3.2 Ex citer RF BNC. RF 3dB HPA shifter (MSA - 1105). PM corrector (MHL8118). MRF 373 Driv e. 2.5W, < 2.3>. < 2.3> 2.3.3
RF PCB 3dB 90 2, Balun. 2 T R 90 Balun 3dB 90, T R Isolat or. MRF 374 20W. 20W 2 IMD < 2.4>, < 2.5>. < 2.4> 20W < 2.5> 2 IMD
2.3.4 RF 3- W ay 3. 60W 3- W ay 150W., MRF 374. 150W 2 IMD < 2.3>, < 2.6>. < 2.3> < 2.6> 2 IMD
2.4 2.4.1 Corrector RF. Correct or /. (Linear Pre- Correction ) RF (Radio Frequency ) (Non - linear Pre- Correction ) RF. Corrector < 2.7>. < 2.7> Corrector 2.4.2 Corrector Shelf PRU (RF UNIT ), PLU (LOGIC UNIT ), PPU (Control Unit ). PRU HPA
RF IF, PLU I Q PRU PPU, PPU I Q. < 2.8> Corrector. < 2.8> Corrector ) PPB (Pre- Corrector Back Unit ) PBU PPU, PLU. PBU RS232 D- SUB 9, PLU T CU ( Control Unit ) RS232 D - SUB 9, PPU,, LAN. AC 110V 220V, A/ S LED. ) PLU (Pre- Correct or Logic Unit ) PLU ARU I, Q RAM
I Q ACU Correction I Q. PRU. ) PPU (Pre- Corrector Proces sor Unit ) PPU Correct or CPU MMX233. PPU GUI. PPU COM 2,,, LAN PBU. PBU PLU. PPU PLU RAM ISA. 2.4.3 - PreCorrection LGIC StarCast DT V RF PreCorrector Shelf PC(PPU, PreCorrector PC ) < 2.9>. < 2.9> Pre- Correction S/ W
, Pre- Corrector. /, S/ N EVM, Con stellation Eye. 2.5 2.5.1 Shelf Shelf F ault Shelf, T V LCD. Shelf RS232, LCD LED, T V /,., T V GUI,. Shelf T CU (T ran slator Control Unit ), B/ D, Shelf CFU (Control Front Unit ), T CU Shelf B/ D,.
2.5.2 < 2.10>, LCD, LED.. LCD LCD LCD DT V -. LED DT V - Shelf < 2.10> ) "CONT ROL", "RESET ", "REMOT E ", "LOCAL", "T X ON ", "T X OFF ", "EXC SW ", "HPA SW " 8. ) LCD LCD LCD 7 LCD. LCD 7 LCD LCD. < 2.11> LCD.
< 2.11> LCD 1) (Main ) < 2.11>,. "T x ", "Statu s", "Log ", "T ime". 2) (ST AT US ). Ex citer A, B HPA HPA A, B.. 3) (T x Monitor ) W. 4),, Corrector, RF Ev ent. ) LED LED < 2.12> LED LED Shelf LED LED LED.
< 2.12> LED 2.5.3 < 2.13> A C,, T CPU (T ran slator Controller Pentium Unit ),. < 2.13> 3. 3.1 3.1.1. DT V RF Shelf 1, Shelf 1, HPA Shelf 2, HPA Shelf 2, Ex cit er Shelf 1, Shelf 2, Shelf 2, Shelf 1, 1.
3.1.2. 1, 1, RFA300 1, 1, (PC, RS232 ) 1, (VSA : 8/ 16 VSB ) 1. 3.1.3., (Span ) 20MHz 20dBm, 100kHz, 300Hz., 20MHz, 8 VSB (16 VSB 16 VSB ), ON (80). 3.2. 3.2.1. T X 50 ± 0.2dBm (100W av g.), 1 < 2.14>. < 2.14> T X 3.2.2. T X F CC (F CC 98-24, Section 92). S suppression (db, ), f 0.5MHz 6.0MHz.
, < 2.15> T X. RFA300 1 < 2.16>. < 2.15> T X < 2.16> T X 3.2.3 T X fc 9MHz - 60dBc. 3.2.4 T X
20kHz Offset (AT SC Standard A/ 64) - 104dBc/ Hz. fm. 3.3. < 2.4>, < 2.5> DT V RF (HP89441) < 2.17>. < 2.3> DT V RF (1) TEST ITEM RESULT SPEC. REMARK OUT OF CHANNEL EMISSION MASK A B OK OK FCC MASK RFA300 SPURIOUS RADIATION HARMONIC OTHER A B A B -68.0dB -67.8dB OK OK -60dB @ under fc ± 9MHz SPECTRUM ANALYZER TX PHASE NOISE A -109dBc/Hz -104dBc/Hz B -108dBc/Hz @ 20kHz RFA300 AMPLITUDE ERROR vs PHASE ERROR GROUP DELAY vs FREQUENCY RESPONSE LOCAL CARRIER FREQUENCY A 0.54dB/2.5deg B 0.40dB/2.7deg A 30ns/0.2dB Under ± B 40ns/0.3dB 100nsec A -10Hz Under ± 250Hz RFA300 RFA300 FREQUENCY COUNTER
< 2.5> DT V RF (2) PEAK TO AVERAGE POWER RATIO B -20Hz A 5.9dB RFA300 B 5.9dB SNR A 31.0dB Over 27dB RFA300 B 31.6dB EVM A 2.0% 5 % RFA300 B 2.1% Rx RX SENSITIVITY A -81dBm B -81dBm POWER CONSUMPTION 1.7kW Under 80dBm @ BER= 3X 10E-6 @ AC 220V BER TESTER < 2.17> DT V RF (HP89441)
. T V 1. DT V 1.1. 2001 T V (KBS, MBC, SBS, EBS ) ET RI T V, DT V,. DT V DT V KBS. DT V,. MBC, SBS, EBS, ET RI( ), LG, LG. 1.2. 1 6. : 1999. 7 8 - KBS ( ) - KBS
: 1999. 12 : 2000 1 2000 8 : 2000 7 2000 8 : 2000 9 1.3. DT V 4. 1 T V,. 3 T V, T V., 2 3. 4 T V. 14 17, 12. 2.,. 1.3.1 1 1 / /,,.
1999 8 5 1 17, / 2. RFA300. T V. T V T V. 1.3.2 2 2 ST B,,. 1999 8 4 1 12, 3. T V major/ minor PSIP. 1.3.3 3 3.,,. 16, 1999 9 10.
, 3,. 3 27 8 24.,,,,,.. 1.3.4 4 4 OCR, OCR OCR.,,. T V KBS,.,. 100dB Isolation ( ),. 2. 2.1 KBS DT V 2.1.1. KBS KBS. T S.
DT V MRC DAR20 IF 16QAM 70MHz IF RF. 6.687GHz. 2.1.2. KBS 1kW 2.5kW. 1kW 3 LGIC 2.5kW. < 3.1> DT V. < 3.1> KBS DT V 2.2 MBC DT V 2.2.1. MBC General Instrum ent Digicipher T M
HD HD- VCR, HD HD HD. 19.58Mbps SMPT E 310M, 6GHz. 2.2.2. MBC < 3.2>. DT V 8VSB, Ex citer,, (F CC DT V MA SK ). MBC 8VSB LG, Ex citer,, NEC 1kW (2.5kW ). < 3.2> MBC DT V 2.3 SBS EBS DT V 2.3.1. SBS SBS DT V
,., LG 1KW LG AT SC NEC. SBS Continental 2.5KW 1. DIGIT AL- ST L DEMOD (16QAM, ) T SDA 1KW av g 2.5KW av g, B/ P FILT ER C/ O, U - LINK 4. 2.3.2. EBS EBS DT V KBS ST L, 7 18 8 18 1 KBS. EBS HDT V HDT V SDT V 1HD/ 3SD PSIP (Program and Sy stem Information Protocol). 3. 3.1 DT V ( ).
DT V AT SC MPEG- 2, AC3, A/ V PSIP. PSIP AT SC DT V PSIP, MPEG- 2 PSI(PAT, PMT ) PSIP. PSIP AT SC A/ 53. DT V PSIP. PSIP. PSIP, PSIP, AV. 3.2 P SIP 3, 3 PCR, PT S/ DT S, T - ST D. syntax. MPEG.. 3.3 P SIP PSIP 4., VCT? (PSIP m anatory ) ST T, MGT, EIT - 0, EIT - 1, EIT - 2, EIT - 3, (PSIP
) EIT - k (k =4, 5,..., 127) ET T - k,. (RRT ), (EIT ).,. 3.4 AV L, R 2, T V. AV AV Interra. L +3.7m sec, R +3.0m sec. - 20m sec +40m sec AV. SDT V HDT V,.., VSB AV. AV. 4. 4.1
1999 5 2000 3. KBS 4,. 1999 7 2000 2,, DT V. 2000 3 240 6 (DT V 3, NT SC 3 ). NT SC DT V, NT SC, DT V,, DT V - DT V - DT V, (multipath ), (impulse noise), (fading ),,. KBS DT V. KBS NT SC DAB. 4.2 4.2.1 NT SC DT V (AT SC), NT SC DT V, DT V,,, -, -,,.
4.2.2 12.. - : KBS, MBC, SBS, EBS - : (ET RI), - :, LG, LG,,,, 4.2.3 DT V 3 1kW ( ) DT V 10kW NT SC 6. < 3.3>. < 3.3> ( )
KBS MBC DT V SBS - DT V NT SC. < 3.4> KBS DT V MBC DT V. < 3.4> KBS - DT V,,, 4. R2, R3, R4, R5, R6. MBC,, R1, R6, R7. < 3.5 (a)> KBS, < 3.5 (b )> MBC. DT V. < 3.4> KBS DT V 4.2.4
DT V KBS. 25, DT V NT SC, HDT V. < 3.5> (a ) KBS (b ) MBC ( Ch 14- MBC, Ch 15- KBS, Ch 16- SBS ) 7kW 3.4m 10m. HL223 (LPD). 4.2.5 1, 1 1, 1. NT SC.
4.2.6. 360, 6MHz,, NT SC DT V (,, S/ N,, ). 2 ( ) 3... 4.2.7.. 8,,,,,, OCR, (,, ). 240 DT V 3, NT SC 3.. ) NT SC DT V 60km. (R9, R1, R2) (R3, R4), (R5, R6) (R7, R8). < 3.1> < 3.6>.
< 3.1> R1-8 R2-21 R3-83 R4-115 R5-168 R6-203 R7-278 R8-310 R9-341 < 3.6> ) DT V 8. 108km. ) 30km
9.,, 10. < 3.7>. < 3.7> ),,,,,.. 5 14. < 3.8>. ).. DT V DT V.. ) 2.5kW. 1kW 2.5kW
1kW. < 3.8> ) (OCR, On Channel Repeater )..... KBS.. RF. S/ N D/ U 15dB
. 3-4dB D/ U S/ N. KBS, 11 25. DT V, 1-2m,,,... ). < 3.9>. < 3.9> (a ) UHF (b ) LPD
UHF LPD 360 DT V 3.4m 9m.. 4m 90. 4. 4.3 4.3.1 9 95. DT V 66.3-76.8 %, NT SC 63.2% DT V. NT SC., NT SC, DT V UHF. DT V 52.5-62.5 %, NT SC 62.8 % NT SC. NT SC, DT V. NT SC DT V. NT SC 3 DT V..
4.3.2 (1) ( ). ( NT SC). NT SC. DT V 3 SBS 10%. DT V NT SC.,.. DT V 2 3 98 99. AT SC.. GA ( 2 ). DT V. NT SC
. 5 10. 2.5 3. DT V. < 3.2>. < 3.2> (NT SC 3 ) (95 ) (80 ) (175 ) DT V (AT SC) NT SC MBC KBS SBS SBS 63 63 73 60 32 32 22 35 (% ) 66.3 66.3 76.8 63.2 50 42 50 49 30 38 30 29 (% ) 6 2.5 5 2.5 6 2.5 6 2.8 113 105 123 109 62 70 52 64 (% ) 64.6 6 0.0 7 0.3 63.0 ( ). < 3.10> SBS DT V 5dB.. ( ) DT V - DT V. DT V S/ N 15 db 15dB.
< 3.10> DT V ACAT S UHF 43 db V/ m. < 3.11> 43 db V/ m ( 0 ). 90 db V/ m.. ( ) NT SC - NT SC DT V. 3 100 db V/ m 2. 3 54 db V/ m.
< 3.11> DT V < 3.12> NT SC ( ) - DT V NT SC < 3.13> DT V NT SC.. NT SC 3 DT V NT SC. 10km NT SC
DT V. < 3.13> DT V - NT SC ( ) < 3.14>.. 43 db V/ m 85%. < 3.14> DT V
( ).... < 3.15> - 13.2dB. Charlott e - 18.2 db, - 15.6dB, DC - 12.4 db DC. DC. < 3.15> DT V ( ) (2) 60km UHF.,,
. 8 73km 108km 108km. < 3.3>. < 3.3> DT V NT SC km dbuv/ m db db dbuv/ m db 1 83 43.7 X 0-62.3 2 2 107 33.1 X 0-43.0 1 3 108 42.6 O 1.43-13.9 50.6 1 4 107 42.7 O 1.06-11.4 55.9 1 5 97 33.9 X 0 - - - 6 86 57.3 O 14.79-10.3 65.1 2.5 7 85 61.1 O 19.49-13.4 71.1 2.5 8 73 41.8 X 0-46.1 1 4.3.3 ( ) DT V - < 3.16>. ( ) DT V < 3.17> - 11.35dB 2dB.. SBS - 12.26dB. (null). ( )
. 1u s 1MHz... < 3.16> DT V ( ) < 3.17> ( )
4.3.4 ( ).... ( ).. 10km. S/ N 16dB. 5-10dB.. S/ N KBS 28dB. 2 3. ( ),.. S/ N 2-3 db. ( )
( ),.... (5). 2-3dB. (6) < 3.18> 1kW 2.5 kw 3dB.. 2dB.. < 3.18> 1kW 2.5kW
(7) 11, ( 67% )..... < 3.4>. < 3.4> ( ) O (VSB ) X (VSB ) 4.3.5 ( ) < 3.19> LPD
. 290 ( ) 40. 3dB. S/ N. LPD S/ N. < 3.19> ( ). 280 ( ). < 3.20>. 3dB...
., < 3.20> ( ) LOS. 30-40km/ h LOS.. LOS..
4.4 1997 AT SC NT SC,,. NT SC DT V. DT V 3 8 6 NT SC DT V.,,.. NT SC 3 DT V 60-70% NT SC DT V., NT SC, DT V. DT V 1kW NT SC 10kW., 3-4 db. DT V NT SC. DT V 43 db V/ m. SBS DT V KBS MBC. 40m.
. GA (2 ) (ARX - T 200, 3 )....,. 5. 5.1 DT V,,... 8VSB 8VSB
.. 8VSB.. 5.2 5.2.1 DT V,. 8VSB NT SC C/ N 30dB. NT SCs PAL C/ N 45dB 20dB. 8VSB C/ N 15.2dB (OCR, On Channel Repeater ). - 100dB. - 100dB. 4 dipole, UHX,. < 3.21>. 5.2.2. DT V., DT V
3 4dB. RF SNR. < 3.21> (30dB ) SNR.. 15dB. 5.3 8. 11... -,,,, -,,, -,.
< 3.5> 45% 36%,. OCR 11. 12 (40 ) 2 OCR. < 3.5> OCR OFF OCR ON ( ) OCR ON ( ) ( ) ( ) 1 351.6 19.6 59.17 79.86 79.35 2 350.3 20.99 68.71 77.01 75.95 3 345.2 20.56 *** 71.44 *** 4 344.1 19.52 51.81 78.5 *** 5 348.3 21.73 69.78 69.78 69.78 6 343.3 21.19 55.11 55.97 *** 7 346.9 19.31 52.48 84.83 *** 8 349.4 19.48 71.19 90.63 *** 9 354 20.74 80.01 81.42 *** 10 348.3 19.94 55.87 64.88 *** X 11 348.4 19.35 51.67 66.16 *** 45.45% 36.36% 45.45% 54.55% 63.64% 54.55% 6.
6.1. T V T V,,,, /,,,,,,. : IT U - R 710 IT U - R BT 710 : IT U - R 562 IT U - R BS 562 : 1 : 1 6.2. T V T V,,,. ('98. 11. 5, ). : MPEG- 2 MP @ HL MPEG- 2 MP @ HL, MP @ ML : 640kbps 512kbps : 640kbps 512kbps 6.3 T V 6.3.1 T V ( ) ISO/ IEC 13818-2 H.262 ( ).
6.3.2 AT SC A/ 53 Annex B Characteristics 6.3.3 (Caption ) EIA EIA - 708 Closed Captioning,. 6.3.4 AT SC.,. 6.3.5 PSIP PSIP. 6.3.6. 6.3.7 SG2 SG2 1)carrier_frequency, 2), 3), 4), 5).
KBS T V T V. T V, T V,. KBS 3 3 T V.. T V T V., PSIP EPG, T V, ST B,,,.