GY/T 198-2003 有线数字电视广播QAM调制器技术要求和测量方法.pdf

GY GY/T198-2003 QAM Specificationsandmethodsofmeasurement on QAMmodulatorused in digital cablebroadcasting system 2003-12-19 2004-02-01
GY/T 198-2003 GY/T 170-2001 GY/T 106-1999 QAM QAM QAM
GY/T 198-2003 QAM GY/T 170-2001GY/T 106-1999 QAM QAM GY/T 106-1999 GY/T 170-2001 3 3.1 modulation error ratio dB 3.2 ASIAsynchronous Seriai Interface PCR Program Clock Reference QAMQuadrature Amplitude Modulation 信息服务平台 SP1 Synchronous Parallel Interface TS Transport Stream 4 QAM 19
GY/T 198-2003 1 QAM GY/T 170-2001 1 2 - 64-QAN256-QAM 3 Mbaud 3.6 6.952 GY/T 170-2001 4 - A 110Mz 862MHz 5 MHz GY/T 106-1999 6 kHz ≤ 25 7 kHz ≤250 8 dBm 8-2 9 75 10 dB 212 8d8n 232 64-QAM u8pe- 6.875Mbaud 11 dB 30 256QAN uap- 6.875Mbaud 12 dB ≥40 u8- 6.875 Mbaud 13 dB 50 ≤-65@1kHz 8dBn 14 dBc/Hz 08-5 610kHZ ≤-100 100kHz -8dBn 256QAM 15 PCR ns ±500 6.875Vbaud 16 - ASI BNC 75Q SPI 25 2 17 BNC F 75 5 5.1 5.1.1 3×10 20
GY/T 198-2003 ASI 0.1UI PCR 50 ns 5.1.2 5MHz 1000MHz 5.1.3 5MHz 1000MHz 0.5dB 1Hz 5.1.4 5MHz 1000MHz ≥-28dBm 5.1.5 5MHz 1000MHz 2×10 PCR 50 ns 5.1.6 5.2 5.2.1 TS QAM 5.2.2 a) QAM QAM b) QAM f. c) f4MHz 5.3 5.3.1 5.3.2 a) QAM 8dBm c b) QAM c) d) f-14MHz f-GMHz N:(dBm) （a f6MHz f14MHz N(dBm) f) C Ns N (ap) g) 110MHz 1000MHZ (wsp)s h) C S (dB) 5.4 21