1、 GY/T 173 2001 MMDS Specification and methods of measurement on MMDS downconverter 2001-07-18 2001-10-01 GY/T 132 1998 MMDS A GY/T 1732001 27 1 2500MHz 2700MHz MMDS MMDS 2 GB/T 7400-1987 GY/T 132-1998 3 3.1 multichannel microwave distribution system MMDS 3.2 MMDS MMDS downconverter MMDS 3.3 conversi
2、on gain dB 3.4 noise figure F dB 3.5 phase noise dBc/Hz 3.6 1dB 1dB compression point of gain 1dB 1dB dBmW dBV dBmW dBV MMDS GY/T 173 2001 Specifications and methods of measurement on MMDS downconverter 2001-07-18 2001-10-01 GY/T 173-2001 28 3.7 two-tone/3 order intermodulation f1 f2 = f1+ 8MHz 1dB
3、20dB fIF1 fIF2 = fIF1+ 8MHz fIF1 8MHz fIF2+ 8MHz fIF1 fIF2 dBc 3.8 image rejection dB 3.9 IF rejection dB 4 1 1 1 MHz 2500 2700 2686MHz 2 MHz 3 MHz 4 kHz/ 30 40 60 5 kHz 10 23 5 6 dB 21 36 7 dB 2 0.5 dB 1.5 8 dB/8MHz 0.2 9 dBc/Hz 80 RBW 10kHz 10 1dB dBmW 1416 11 dBc 50 1dB 20dB 12 dB 50 13 dB 65 14
4、/ dBc 65 50dBm 15 dBm 555 16 50(N ) 17 75(F ) 18 dB 16 19 V 15 GY/T 173-2001 29 1 20 95 21 4060 5 5.1 2.5GHz 2.7GHz 100dBc/Hz 5.2 0.01GHz 3GHz 100dBc/Hz 10kHz 80dBc 5.3 0.01GHz 3GHz 0.3dB 0.2dB 5.4 2.5GHz 2.7GHz 0.2dB 5.5 0.01GHz 3GHz 1 0.5dB 5.6 1W 100mW 30dBm 20dBm 1 5.7 2.5GHz 2.7GHz 1W 100mW 30d
5、Bm 20dBm 5.8 2.5GHz 2.7GHz 6dB 12dB 17dB 5.9 75 50 30MHz 1000MHz GY/T 173-2001 30 6dB 10dB 5.10 30MHz 1000MHz 10dB 20dB 30dB 6 6.1 6.1.1 1 1 6.1.2 6.1.2.1 1 30 6.1.2.2 fRF =2500.0000MHz A1 0.1kHz 6.1.2.3 -50dBm -40dBm MMDS 6.1.2.4 1 fIF fIF = fRF- fLO 1 fRF MHz fLO ,MHz 6.1.2.5 fIF 500kHz 10kHz 100H
6、z 6.1.2.6 fIF 0.1kHz A1 6.1.2.7 2 fLO fLO = fRF- fIF 2 0.1kHz A1 6.1.2.8 fRF = 2600.0000MHz fRF = 2686.0000MHz 6.1.2.9 6.1.2.2 6.1.2.7 MMDS 6dB 10dBGY/T 173-2001 31 6.2 / 6.2.1 / 1 6.2.2 6.2.2.1 1 30 6.2.2.2 fRF = 2500.000MHz 1kHz A2 6.2.2.3 50dBm 6.2.2.4 2fIF 2fIF 6.2.2.5 6.2.2.6 50dBm A2 0.1dBm 6.
7、2.2.7 fIF A2 0.1dBm A2 0.1dB 6.2.2.8 fRF = 2600.000MHz 2686.000MHz 6.2.2.2 6.2.2.7 6.2.2.9 6.2.2.2 6.2.2.7 fRF = 2500.000 MHz 2600.000 MHz 2686.000MHz 3fIF 6.3 6.3.1 2 2 6.3.2 6.3.2.1 2 30 6.3.2.2 3 4 MMDS 6dB 10dB GY/T 173-2001 32fIFL = 2500.000MHz - fLO 3 fIFH = 2686.000MHz - fLO 4 fIFL MHz fIFH M
8、Hz fLO fIFL fIFH 6.1 6.3.2.3 fIF= fIFL A3 1kHz 30dBm 20dBm 6.3.2.4 fIFL fIFL 30dBm 5MHz 10kHz 10kHz 6.3.2.5 dBm A3 0.5dBm 6.3.2.6 / dBm A3 6.3.2.7 dB A3 6.3.2.8 fIFH 6.3.2.3 6.3.2.7 6.4 6.4.1 1 6.4.2 6.4.2.1 1 30 6.4.2.2 fIM fIF fLO 5 (6) fIML = fLO - fIFL 5 fIMH = fLO - fIFH 6 fIML MHz fIMH MHz fLO
9、 fIFL fIFH 6.3 6.4.2.3 fIML fIMH 6.3.2.3 6.3.2.7 A3 6.5 6.5.1 3 4 6.5.2 6.5.2.1 3 30 GY/T 173-2001 33 3 6.5.2.2 fLO fLO 5MHz 10kHz 10kHz 30dBm 6.5.2.3 fLO MHz dBm A4 1kHz 0.5dBm 6.5.2.4 2fLO 3fLO 6.5.2.2 6.5.2.3 A4 6.5.2.5 4 4 6.5.2.6 6.5.2.2 6.5.2.4 A4 6.6 6.6.1 5 6 5 6 MMDS 50 MMDS 75 50 50 MMDS G
10、Y/T 173-2001 34 6.6.2 6.6.2.1 6 30 6.6.2.2 ENR 6.6.2.3 6.6.2.4 2500.000MHz 2686.000MHz 10MHz 6.6.2.5 6.6.2.6 5 30 6.6.2.7 A5 0.1dB 6.6.2.8 A5 5 7 G = GDIS + ASPS + AIMT 7 G dB GDIS dB ASPS dB AIMT dB ASPS AIMT 0.1dB A5 6.6.2.9 A5 G 2 dB A5 0.1dB 6.7 8MHz 6.7.1 5 6 6.7.2 6.7.2.1 6.6.2.1 6.6.2.3 6.7.2
11、.2 2500.000MHz 2508.000MHz 1.0MHz 6.7.2.3 6.6.2.5 6.6.2.6 6.7.2.4 A6 0.1dB 6.7.2.5 6.6.2.8 6.7.2.6 A6 G 2 8MHz A6 0.1dB 6.7.2.7 2600 MHz 2678MHz 2608 MHz 2686MHz 1MHz 6.7.2.3 6.7.2.6 6.8 6.8.1 GY/T 173-2001 35 7 7 6.8.2 6.8.2.1 7 30 6.8.2.2 fRF = 2500.000MHz A7 1kHz 6.8.2.3 40dBm 6.8.2.4 fIF= fRF fLO fLO 6.8.2.5 50kHz fRBW 1kHz 100Hz fIF 6.8.2.6 MARKER 10kHz MARKER NSBS + dBc A7 0.1dB 6.8.2.7 MARKER 10kHz MARKER NSBS dBc A7 0.1dB 6.8.2.8 10kHz NSBSM dBc A7 6.8.2.9 8 fRBW 1Hz N
