1、 Specification and methods of measurement on MMDS transmitter GY/T 171 2001 MMDS 2001-07-18 2001-10-01 GY/T 132 1998 MMDS A B GY/T 1712001 1 1 2500MHz 2700MHz MMDS MMDS 2 GB 6277-1986 GB/T 7400-1987 GY/T 122-1995 GY/T 132-1998 3 3.1 multichannel microwave distribution system MMDS 3.2 MMDS MMDS trans
2、mitter MMDS MMDS MMDS TV 3.3 rated power 3.4 frequency deviation MMDS GY/T 171 2001 MMDS Specifications and methods of measurement on MMDS transmitter 2001-07-18 2001-10-01 GY/T 171-2001 2 3.5 frequency stability MMDS MMDS 3.6 phase noise dBc/Hz 3.7 intermodulation ratio in channel dBc MMDS fV fA fC
3、 fV +fA fC 3.8 harmonic suppression dBc 3.9 spurious suppression dBc 3.10 return loss , LR LR 20log dB LR 1 VSWR 1 VSWR 20log + = (dB) 4 1 2 1 1 fV MHz A 2 A Hz/ 500 10 45 3 PS W 10/20/50 4 m dBc 70 5 sH dBc 70 6 s S dBc 65 7 N dBc/Hz 85 10kHz 8 50 N 9 dB 19 GY/T 171-2001 3 2 1 V 1 2 3 75 4 C3F 5 dB
4、 30 6 dB 26 0.3V( ) 50Hz 7 87.5 8 dB 2 5.8MHz 9 3 10 3 11 / ns 35 12 / 10 13 K 2T 2 14 3 15 dB 55 16 dBm 0 17 600 18 19 F3E 20 dB 60 21 dB 60 22 / dB 17 7dB 23 / kHz 6500 100Hz 24 s 50 25 kHz 50 26 dB 1 30Hz 10kHz 27 1 30Hz 10kHz 28 1045 29 95 30 V 22010% 50 Hz GY/T 171-2001 4 5 5.1 1MHz 1000MHz 100
5、dBc/Hz 5.2 0.01GHz 8GHz 100dBc/Hz 10kHz 20dBm 80dBc 5.3 0.01GHz 3GHz 1 0.5dB 5.4 0.01GHz 3GHz 1Hz 5 10 10 / 5.5 PAL 5.6 5MHz 10MHz 2 10 10 5.7 1W 100mW 30dBm 20dBm 1 5.8 2GHz 3GHz 1W 100mW 30dBm 20dBm 5.9 2GHz 8GHz 20dB 17dB 50W 5.10 75 50 30MHz 1000MHz 6dB 10dB 5.11 GY/T 171-2001 5 2GHz 8GHz 20dB 5
6、0W 5.12 2GHz 3GHz 40dB 50W 50 N / 6 6.1 fV A 6.1.1 1 MMDS 6.1.2 6.1.2.1 1 30 6.1.2.2 MMDS 1Hz 1 1 6.1.2.3 1s 1Hz 12 30 61 fi i 1 2 61 fi 10Hz B1 1 fi fV fi B1, 10Hz fi fi fV (1) 61 fi f1M B4 6.1.2.4 198V 220V 242V fL1 fL2 fL3 10Hz B2 2 fV fLi MMDS 40dB 50W GY/T 171-2001 6 B2, 10Hz fLi = fLi fV (i =
7、1 2 3) (2) 3 fLi f2M B4 6.1.2.5 220V 10 20 45 fT1 fT2 fT3, 10Hz B3 3 fV fTi B3, 10Hz fTi = fTi fV (i = 1 2 3) (3) 3 fTi f3M B4 6.1.2.6 4 MMDS A B4, 10Hz ) ( 2 1 3M 2M 1M f f A + + = kHz/ (4) 6.2 MMDS PB PS PAL B S1.68 1 P S A S P P = = + ) ( 2 B A 0.75 S 0.073 PAL 4.7s 64 s 6.2.1 2 6.2.2 6.2.2.1 2 3
8、0 6.2.2.2 MMDS 6.2.2.3 mW 2 MMDS 40dB 50W 20dB 50W 20dB 50W GY/T 171-2001 7 6.2.2.4 87.5% 6.2.2.5 A fV 10MHz 300kHz 30kHz fV fA 6.2.2.6 10dB/div 17dB 6.2.2.7 10W/20W/50W 17dB PM 0.1mW, B5 5 MMDS PB 0.1W B5 1000 P ) 10 C arclog( (1 ) 10 A arclog( M B + = P W 5 A dB C dB 6.2.2.8 6 PS 0.1W B5 PS 1.68 P
9、B W 6 6.2.2.9 2 / V/A GY/T 122-1995 6.3 6.3.1 3 3 6.3.2 6.3.2.1 3 30 6.3.2.2 MMDS 6.3.2.3 fC=fV+4.43MHz 30dBm 40dB 50W GY/T 171-2001 8 6.3.2.4 A fV 10MHz 100kHz 30kHz fV fA 6.3.2.5 26dB 6.3.2.6 20dBm 10 dB/div 10W/20W/50W 17dB fA fC fV 17dB 26dB PV 0.1dB B6 6.3.2.7 fV +fA fC 2MHz 1kHz 100kHz Pm 0.1d
10、B B6 7 m m = Pm PV dBc 7 6.4 6.4.1 4 4 6.4.2 6.4.2.1 4 30 6.4.2.2 MMDS 6.4.2.3 A fV 10MHz 100kHz 30kHz fV fA PV 0.1dBm B7 6.4.2.4 2fV 2MHz PH MMDS 40dB 50W GY/T 171-2001 9 0.1dBm B7 8 sH sH = PH PV dBc 8 6.4.2.5 6.4.2.4 200 MHz PZ 0.1dBm B7 9 sS sS = PZ PV dBc 9 6.5 6.5.1 4 6.5.2 6.5.2.1 4 30 6.5.2.2 MMDS 6.5.2.3 A fV 50kHz fRBW 1kHz 100Hz fV 6.5.2.4 MARKER 10kHz MARKER NSBS + dBc B8 0.1dB 6.5.2.5
