Jiuzhou

Jiuzhou

• 1.
  ‫‪TEST REPORT‬‬ ‫‪Ku-Band LNB‬‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ‬ ‫‪Jiuzhou Skytrack‬‬ ‫33‪JSU‬‬ ‫ﻟﻨﻈﺎﻡ ﺍﻻﺳﺘﻘﺒﺎﻝ ﺍﻟﻤﺘﻌﺪﺩ‬ ‫ﺍﻟﺘﻐﺬﻳﺔ‬ ‫ﺇﺫﺍ ﺳﺄﻟﺖ ﻫﻮﺍﺓ ﺍﺳﺘﻘﺒﺎﻝ ﺍﻷﻗﻤﺎﺭ ﺍﻟﺼﻨﺎﻋﻴﺔ ﻋﻤﺎ ﻫﻮ ﺃﻫﻢ ﺷﺊ ﻋﻨﺪ ﺍﺧﺘﻴﺎﺭ‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺷﻮﺷﺮﺓ ﻻﺳﺘﻘﺒﺎﻝ ﻓﺎﻥ ﺍﻟﺮﺩ ﺳﻴﻜﻮﻥ ﻓﻰ ﺍﻟﻐﺎﻟﺐ ﻫﻮ ﻗﺪﺭﺓ ﻛﺴﺐ‬ ‫ﺍﻟﺘﺤﻮﻳﻞ ﻭ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ، ﺍﻷﻭﻝ ﻳﺠﺐ ﺃﻥ ﻳﻜﻮﻥ ﻓﻰ ﺃﻋﻠﻰ ﺩﺭﺟﺔ ﻭ ﺍﻟﺜﺎﻧﻰ‬ ‫ﻳﺠﺐ ﺃﻥ ﻳﻜﻮﻥ ﻓﻰ ﺍﻗﻞ ﺩﺭﺟﺔ ، ﺇﻥ ﻣﻌﻈﻢ ﻗﺮﺍء ﺍﻟﻤﺠﻠﺔ ﻳﻌﺮﻓﻮﻥ ﻣﻌﻨﻰ ﻗﺪﺭﺓ‬ ‫ﻛﺴﺐ ﺍﻟﺘﺤﻮﻳﻞ ﻫﻰ ﺃﻥ ﺍﻹﺷﺎﺭﺍﺕ ﺍﻟﺨﺎﺭﺟﺔ ﻣﻦ ﻣﺨﺮﺝ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ‬ ‫ﻋﺎﻟﻴﺔ ﻓﻤﻊ ﺍﺳﺘﺨﺪﺍﻡ ﻛﺎﺑﻼﺕ ﻃﻮﻳﻠﺔ ﺃﻭ ﺳﻮﻳﺘﺸﺎﺕ ﻓﻼ ﻧﺨﺸﻰ ﻣﻦ ﺿﻌﻒ‬ ‫ﺍﻻﺳﺘﻘﺒﺎﻝ ﻛﺜﻴﺮﺍ .‬ ‫9002/70-60‬ ‫33‪JIUZHOU SKYTRACK JSU‬‬ ‫‪Lightweight LNBF very suitable for‬‬ ‫.‪multifeed installations‬‬ ‫■ ﺍﻟﺴﻴﺪ ‪ Jacek Pawlowski‬ﻣﻦ ﻓﺮﻳﻖ ﺍﺧﺘﺒﺎﺭ ﻣﺠﻠﺔ ﺗﻴﻠﻰ‬ ‫ﺳﺘﻼﻳﺖ ﻳﻘﻮﻡ ﺑﺘﺮﻛﻴﺐ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﺍﻟﺠﺪﻳﺪﺓ ‪Skytrack‬‬ ‫ﻣﻦ ﺷﺮﻛﺔ ‪ Jiuzhou‬ﺇﻟﻲ ﻃﺒﻖ ﻏﻴﺮ ﻣﻀﺒﻮﻁ ﺍﻟﺒﺆﺭﺓ ﻣﻮﺟﺔ ﺇﻟﻰ ﺍﻟﻘﻤﺮ‬ ‫‪ HOTBIRD‬ﻋﻨﺪ 31 ﺩﺭﺟﺔ ﺷﺮﻕ ، ﺇﻥ ﻭﺣﺪﺓ 33‪ JSU‬ﺻﻐﻴﺮﺓ ﺍﻟﺤﺠﻢ‬ ‫ﻭ ﺧﻔﻴﻔﺔ ﺍﻟﻮﺯﻥ ﺑﺸﻜﻞ ﻣﺪﻫﺶ .‬ ‫‪54 TELE-satellite & Broadband — 06-07/2009 — www.TELE-satellite.com‬‬
• 2.
  www.TELE-satellite.com — 06-07/2009— TELE-satellite & Broadband 55
• 3.
  ‫.../‪TELE-satelliteother languageswww.TELE-satellite.com‬‬ ‫‪Download this report in‬‬ ‫:‪World from the Internet‬‬ ‫‪Arabic‬‬ ‫ﺍﻟﻌﺮﺑﻴﺔ‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/ara/jiuzhou.pdf‬‬ ‫‪Indonesian‬‬ ‫‪Indonesia‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/bid/jiuzhou.pdf‬‬ ‫‪Bulgarian‬‬ ‫‪Български‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/bul/jiuzhou.pdf‬‬ ‫‪Czech‬‬ ‫‪Česky‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/ces/jiuzhou.pdf‬‬ ‫‪German‬‬ ‫‪Deutsch‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/deu/jiuzhou.pdf‬‬ ‫ﻣﻮﺍﺻﻔﺎﺗﻬﺎ ﺃﻧﻬﺎ ﺗﻌﻤﻞ ﻋﻠﻰ ﻗﺪﺭﺓ ﺧﻔﺾ‬ ‫‪English‬‬ ‫‪English‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/eng/jiuzhou.pdf‬‬ ‫‪Spanish‬‬ ‫‪Español‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/esp/jiuzhou.pdf‬‬ ‫ﺷﻮﺷﺮﺓ 6.0 ‪ dB‬ﻭ ﻗﺪ ﻗﻤﻨﺎ ﺑﻤﻘﺎﺭﻧﺘﻬﺎ‬ ‫‪Farsi‬‬ ‫ﻓﺎﺭﺳﻲ‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/far/jiuzhou.pdf‬‬ ‫‪French‬‬ ‫‪Français‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/fra/jiuzhou.pdf‬‬ ‫ﻭﺣﺪﺗﻲ ﺧﻔﺾ ﺷﻮﺷﺮﺓ ﺍﻷﻭﻝ ﺑﻘﺪﺭﺓ‬ ‫‪Greek‬‬ ‫‪Ελληνικά‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/hel/jiuzhou.pdf‬‬ ‫‪Croatian‬‬ ‫‪Hrvatski‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/hrv/jiuzhou.pdf‬‬ ‫ﺧﻔﺾ ﺷﻮﺷﺮﺓ ﺗﻘﻮﻝ ﻣﻮﺍﺻﻔﺎﺗﻬﺎ ﺃﻧﻬﺎ‬ ‫‪Italian‬‬ ‫‪Hungarian‬‬ ‫‪Italiano‬‬ ‫‪Magyar‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/ita/jiuzhou.pdf‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/mag/jiuzhou.pdf‬‬ ‫ﺗﻌﻤﻞ ﺑﻘﺪﺭﺓ ﺧﻔﺾ ﺷﻮﺷﺮﺓ 3.0 ‪dB‬‬ ‫‪Mandarin‬‬ ‫‪Dutch‬‬ ‫‪中文‬‬ ‫‪Nederlands‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/man/jiuzhou.pdf‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/ned/jiuzhou.pdf‬‬ ‫‪Polski‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/pol/jiuzhou.pdf‬‬ ‫ﻭ ﺍﻷﺧﺮﻯ ﺗﻘﻮﻝ ﻣﻮﺍﺻﻔﺎﺗﻬﺎ ﺃﻧﻬﺎ ﺗﻌﻤﻞ‬ ‫‪Polish‬‬ ‫‪Portuguese‬‬ ‫‪Português‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/por/jiuzhou.pdf‬‬ ‫‪Romanian‬‬ ‫‪Românesc‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/rom/jiuzhou.pdf‬‬ ‫ﺑﻘﺪﺭﺓ ﺧﻔﺾ ﺷﻮﺷﺮﺓ 2.0 ‪. dB‬‬ ‫‪Russian‬‬ ‫‪Русский‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/rus/jiuzhou.pdf‬‬ ‫‪Swedish‬‬ ‫‪Svenska‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/sve/jiuzhou.pdf‬‬ ‫‪Turkish‬‬ ‫‪Türkçe‬‬ ‫‪www.TELE-satellite.com/TELE-satellite-0907/tur/jiuzhou.pdf‬‬ ‫9002 ‪Available online starting from 29 May‬‬ ‫ﻭ ﻟﻐﺮﺽ ﺍﻻﺧﺘﺒﺎﺭ ﻗﻤﻨﺎ ﺑﺎﺧﺘﻴﺎﺭ‬ ‫ﺍﻻﺳﺘﻘﺒﺎﻝ ﻣﻦ ﺍﻟﻘﻤﺮ ‪ HOTBIRD‬ﻋﻨﺪ‬ ‫31 ﺩﺭﺟﺔ ﺷﺮﻕ ﻭ ﻛﻤﺎ ﻫﻮ ﻣﻮﺿﺢ ﻓﻰ‬ ‫ﻭ ﻣﺴﺘﻮﻯ ﺍﻟﺘﻨﺎﻏﻢ ﺍﻟﻮﺳﻴﻂ ، ﻭ‬ ‫ﺃﻣﺎ ﺑﺎﻟﻨﺴﺒﺔ ﻟﺨﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻓﻬﻲ‬ ‫ﺍﻟﺠﺪﻭﻝ ﺭﻗﻢ 1 : ﺍﻟﻨﻮﺍﻗﻞ ﺍﻟﺘﻰ ﺗﻢ ﺇﺟﺮﺍء‬ ‫ﺍﻟﺠﺪﻭﻝ ﺭﻗﻢ 1 ﺗﺮﻯ ﺑﻴﺎﻧﺎﺕ ﺍﻟﺘﺮﺩﺩﺍﺕ‬ ‫ﺭﻓﺾ ﺍﻟﺼﻮﺭﺓ ، ﻭ ﻟﻬﺬﺍ ﻭ ﻟﻬﺬﺍ ﻳﺠﺐ‬ ‫ﺿﻤﺎﻥ ﺇﺷﺎﺭﺍﺕ ﻗﻮﻳﺔ ﺑﺎﻟﻨﺴﺒﺔ ﻟﻤﻌﺪﻝ‬ ‫ﺍﺧﺘﺒﺎﺭ ﺍﺳﺘﻘﺒﺎﻟﻬﺎ‬ ‫ﺍﻟﺘﻰ ﻗﻤﻨﺎ ﺑﺎﺧﺘﺒﺎﺭ ﺍﺳﺘﻘﺒﺎﻟﻬﺎ ، ﻭ ﻛﻤﺎ‬ ‫ﺗﺮﻛﻴﺐ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻋﻠﻰ‬ ‫ﺍﻟﻀﻮﺿﺎء ﻣﻦ ﻣﺨﺮﺝ ﻭﺣﺪﺓ ﺧﻔﺾ‬ ‫ﺗﺮﻯ ﻫﻨﺎﻙ 3 ﻧﻮﺍﻗﻞ ﻟﻜﻞ ﺣﺰﻣﺔ ﻓﺮﻋﻴﺔ )‬ ‫ﻃﺒﻖ ﻭ ﺍﺳﺘﻘﺒﺎﻝ ﺍﻹﺷﺎ ﺭﺍﺕ ﻓﻰ ﺍﻟﻌﺎﻟﻢ‬ ‫ﺍﻟﺸﻮﺷﺮﺓ ﻣﻤﺎ ﻳﻀﻤﻦ ﺍﻻﺳﺘﻘﺒﺎﻝ ﺍﻟﺠﻴﺪ‬ ‫ﺍﻟﻤﺮﺗﻔﻌﺔ / ﺍﻟﻤﻨﺨﻔﻀﺔ ( ﻭ ﻟﻜﻞ ﻗﻄﺒﻴﺔ‬ ‫ﺍﻟﺤﻘﻴﻘﻲ ، ﺇﻥ ﻭﺟﻮﺩ ﺍﻟﻌﺪﻳﺪ ﻣﻦ ﺍﻟﻨﻮﺍﻗﻞ‬ ‫ﻣﻦ ﺍﻟﻨﻮﺍﻗﻞ ﺍﻟﻀﻌﻴﻔﺔ ﺍﻹﺷﺎﺭﺓ ، ﻭ ﻫﻰ‬ ‫ﺑﻴﻨﻤﺎ ﻳﻮﺟﺪ 8 ﺗﺮﺩﺩﺍﺕ ﻣﻨﺨﻔﻀﺔ‬ ‫ﻟﻠﻨﻮﺍﻗﻞ ﻓﺎﻥ ﺃﺩﺍء ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ‬ ‫ﻟﻠﻮﺣﺪﺓ ﻛﺎﻥ ﺍﻷﺳﻮﺃ ﻟﺒﻘﻴﺔ ﺍﻟﻮﺣﺪﺍﺕ ﻭ‬ ‫ﻟﻜﻨﻬﺎ ﺗﻐﻠﺒﺖ ﻋﻠﻰ ﺍﻷﻗﻞ ﻓﻰ ﺍﻷﺭﺑﻌﺔ‬ ‫ﺗﺮﺩﺩﺍﺕ ﺍﻟﺒﺎﻗﻴﺔ ﻣﺜﻞ ﺍﻟﺘﺮﺩﺩ ﻟﻠﻨﺎﻗﻞ )-‪Tr‬‬ ‫11 ( ﻭ ﻛﻤﺎ ﺗﺮﻯ ﻓﺎﻥ ﻭﺣﺪﺓ ﺧﻔﺾ‬ ‫ﺍﻟﺸﻮﺷﺮﺓ 2.0 ‪ dB‬ﻟﻢ ﺗﻜﻦ ﺍﻓﻀﻞ ﻣﻦ‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ 3.0 ‪ ! dB‬ﻭ‬ ‫ﻛﻤﺎ ﻗﻠﻨﺎ ﻣﻦ ﻗﺒﻞ ﻓﺎﻥ ﻣﻌﺪﻝ ﺧﻔﺾ‬ ‫ﺍﻟﺸﻮﺷﺮﺓ ﻟﻴﺲ ﻫﻮ ﺍﻟﻤﻘﻴﺎﺱ ﺍﻟﻮﺣﻴﺪ‬ ‫ﻻﺧﺘﻴﺎﺭ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻭ ﻟﻜﻦ‬ ‫ﺍﺧﺘﺒﺎﺭ ﺍﻻﺳﺘﻘﺒﺎﻝ ﺍﻟﺤﻘﻴﻘﻲ ﻳﻤﻜﻨﻪ‬ ‫ﻛﺸﻒ ﻛﻞ ﺷﺊ .‬ ‫ﻭ ﻣﺎﺫﺍ ﻋﻦ ﺍﻟﻌﻮﺍﻣﻞ ﺍﻷﺧﺮﻯ ؟ ﺗﻢ‬ ‫ﺍﻟﺸﻜﻞ ﺭﻗﻢ 1 : ﻣﻘﻴﺎﺱ ‪ MER‬ﻟﻌﺪﺩ ﺃﺛﻨﻰ ﻋﺸﺮ ﻧﺎﻗﻞ ﻣﺨﺘﻠﻒ ﻣﻦ ﺍﻟﻘﻤﺮ ‪ HOTBIRD‬ﻋﻨﺪ 31 ﺩﺭﺟﺔ ﺷﺮﻕ .‬ ‫ﺗﻮﺿﻴﺤﻬﺎ ﻓﻰ ﺍﻟﺸﻜﻞ ﺭﻗﻢ 2 ، ﻭ ﻫﻨﺎ‬ ‫ﺗﺠﺪ ﺍﻟﻤﻮﻗﻒ ﻗﺪ ﺗﻐﻴﺮ ﻋﻠﻰ ﺍﻟﻨﻘﻴﺾ‬ ‫، ﻭ ﺑﻬﺬﻩ ﺍﻟﻄﺮﻳﻘﺔ ﻗﻤﻨﺎ ﺑﻔﺤﺺ ﺍﻷﺩﺍء‬ ‫ﺍﻟﻤﺘﺠﺎﻭﺭﺓ ﻳﺠﻌﻞ ﺍﻷﻣﺮ ﺻﻌﺒﺎ ﻋﻠﻰ‬ ‫ﺃﻳﻀﺎ ﺗﻀﻤﻦ ﻫﺎﻣﺶ ﺟﻴﺪ ﻣﻦ ﺍﻻﺳﺘﻘﺒﺎﻝ‬ ‫ﻓﺎﻥ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ 33‪ JSU‬ﻗﺪ‬ ‫ﻟﻠﻤﺬﺑﺬﺏ ﺍﻟﻤﺤﻠﻰ : 0579 ﻭ 00601‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻭ ﻳﻘﻠﻞ ﻣﻦ ﺃﺩﺍء‬ ‫ﻓﻰ ﺣﺎﻟﺔ ﺍﻟﻄﻘﺲ ﺍﻟﺴﻴﺊ ، ﻭ ﻟﻜﻦ ﻟﻸﺳﻒ‬ ‫ﺗﻐﻠﺒﺖ ﻋﻠﻰ ﺍﻟﺠﻤﻴﻊ ﺑﺎﻟﻨﺴﺒﺔ ﻟﻠﻨﻮﺍﻗﻞ‬ ‫ﻣﻴﺠﺎﻫﻴﺮﺗﺰ ﻓﻰ ﻛﻠﻰ ﺍﻟﻘﻄﺒﻴﺘﻴﻦ :‬ ‫ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ .‬ ‫ﻓﺎﻥ ﺩﺭﺟﺔ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﺍﻟﺤﻘﻴﻘﻲ‬ ‫11 ﻭ 21 ﻓﺎﻥ ﻗﻮﺓ ﺧﺮﺝ ﺍﻹﺷﺎ ﺭﺍﺕ ﻛﺎﻧﺖ‬ ‫ﺍﻷﻓﻘﻴﺔ ﻭ ﺍﻟ ﺮﺃﺳﻴﺔ ﻭ ﻓﻰ ﻣﻨﺘﺼﻒ ﻭ‬ ‫ﻟﻮﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻻ ﻳﻤﻜﻦ ﺗﻨﺒﺌﺔ‬ ‫ﺃﻋﻠﻰ ﻣﻦ ﺍﻟﻮﺣﺪﺍﺕ ﺍﻷﺧﺮﻯ ﺍﻟﻤﻨﺎﻓﺴﺔ ،‬ ‫ﻧﻬﺎﻳﺔ ﻋﺮﺽ ﺍﻟﺤﺰﻣﺔ ﺍﻟﻔﺮﻋﻴﺔ .‬ ‫ﻭ ﻓﻰ ﺍﺧﺘﺒﺎﺭﻧﺎ ﻧﻘﻮﻡ ﺑﻤﻘﺎﺭﻧﺔ ﺍﻷﺩﺍء‬ ‫، ﻓﻬﻨﺎﻙ ﻋﺪﺓ ﻋﻮﺍﻣﻞ ﺗﺘﺪﺧﻞ ﻓﻰ ﻗﺪﺭﺓ‬ ‫ﻭ ﻫﺬﺍ ﺣﻘﻴﻘﻲ ﺧﺼﻮﺻﺎ ﻟﻮﺣﺪﺓ ﺧﻔﺾ‬ ‫ﺍﻟﻔﻌﻠﻲ ﻟﻮﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻣﻊ‬ ‫ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ .‬ ‫ﺍﻟﺸﻮﺷﺮﺓ 3.0 ‪ dB‬ﺍﻟﺘﻰ ﻛﺎﻧﺖ ﺍﻟﻔﺎﺋﺰﺓ‬ ‫ﻭ ﺍﻟﺸﻜﻞ ﺭﻗﻢ 1 ﻳﻈﻬﺮ ﺃﺩﺍء ﺧﻔﺾ‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺷﻮﺷﺮﺓ ﺃﺧﺮﻯ ﻣﺘﺎﺣﺔ‬ ‫ﺑﻤﻌﺪﻝ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ .‬ ‫ﺍﻟﺸﻮﺷﺮﺓ ﻟﺠﻤﻴﻊ ﺍﻟﻮﺣﺪﺍﺕ ، ﻭ ﺍﻷﺩﺍء‬ ‫ﻓﻰ ﺍﻷﺳﻮﺍﻕ ، ﻭ ﻫﺬﺍ ﻣﺎ ﻓﻌﻠﻨﺎﻩ ﻣﻊ‬ ‫ﻫﺬﻩ ﺍﻟﻌﻮﺍﻣﻞ ﻫﻰ: ﻣﺮﺣﻠﺔ ﺍﻟﻀﻮﺿﺎء‬ ‫ﺍﻷﻓﻀﻞ ﻟﺨﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ ﻟﻮﺣﺪﺓ ﺧﻔﺾ‬ ‫ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ :‪Jiuzhou‬‬ ‫ﻓﻰ ﺍﻟﻤﺬﺑﺬﺏ ﺍﻟﻤﺤﻠﻰ ﻟﻮﺣﺪﺓ ﺧﻔﺾ‬ ‫ﻓﻤﺎ ﻫﻰ ﺍﻟﻨﺘﺎﺋﺞ ﺍﻟﺘﻰ ﻳﻤﻜﻦ ﺃﻥ‬ ‫ﺍﻟﺸﻮﺷﺮﺓ ﻫﻰ ﺍﻟﻘﻴﻢ ﺍﻷﻋﻠﻰ .‬ ‫33‪ Skytrack JSU‬ﺍﻟﺘﻰ ﺗﻘﻮﻝ‬ ‫ﺍﻟﺸﻮﺷﺮﺓ ﻭ ﻋﺎﺯﻝ ﺍﻟﻘﻄﺒﻴﺔ ﺍﻟﻌﻜﺴﻲ‬ ‫ﻧﺴﺘﺨﻠﺼﻬﺎ ﻣﻦ ﻫﺬﻩ ﺍﻟﻨﺘﺎﺋﺞ ؟ ﺇﻥ‬ ‫ﻧﻘﻄﺔ ﺍﻟﻘﻮﺓ ﻓﻰ ﻭﺣﺪﺓ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ‬ ‫33‪ Skytrack JSU‬ﻫﻰ ﻗﻮﺓ ﻣﺨﺮﺝ‬ ‫ﺍﻹﺷﺎ ﺭﺍﺕ ، ﻭ ﻟﻬﺬﺍ ﻓﻬﻲ ﺍﺧﺘﻴﺎﺭ ﺟﻴﺪ‬ ‫ﻟﻨﻈﺎﻡ ﺍﻻﺳﺘﻘﺒﺎﻝ ﺍﻟﻤﺘﻌﺪﺩ ﺍﻟﺘﻐﺬﻳﺔ‬ ‫ﻋﻨﺪ ﺍﺳﺘﺨﺪﺍﻡ ﺳﻮﻳﺘﺸﺎﺕ ﻭ ﻛﻮﺍﺑﻞ‬ ‫ﻃﻮﻳﻠﺔ ﻟﺘﻮﺯﻳﻊ ﺍﻹﺷﺎ ﺭﺍﺕ ﻟﻠﻌﺪﻳﺪ ﻣﻦ‬ ‫ﺃﺟﻬﺰﺓ ﺍﻟﺮﻳﺴﻴﻔﺮ ، ﻭ ﺍﻟﻤﻴﺰﺓ ﺍﻷﺧﺮﻯ‬ ‫ﺃﻥ ﺍﻟﻮﺣﺪﺓ ﺻﻐﻴﺮﺓ ﺍﻟﺤﺠﻢ ﻭ ﺫﺍﺕ ﻭﺯﻥ‬ ‫) 001 ﺟ ﺮﺍﻡ ﻓﻘﻂ ( ﻭ ﺫﻟﻚ ﺑﻤﻘﺎﺭﻧﺘﻬﺎ‬ ‫ﺑﺎﻟﻮﺣﺪﺍﺕ ﺍﻷﺧﺮﻯ ﺍﻟﻤﻤﺎﺛﻠﺔ .‬ ‫ﺍﻟﺸﻜﻞ ﺭﻗﻢ 2 : ﻣﻘﻴﺎﺱ ﻗﻮﺓ ﻣﺨﺎﺭﺝ ﻭﺣﺪﺍﺕ ﺧﻔﺾ ﺍﻟﺸﻮﺷﺮﺓ .‬ ‫‪56 TELE-satellite & Broadband — 06-07/2009 — www.TELE-satellite.com‬‬
• 4.
  ‫ﺗﻌﻠﻴﻖ ﺍﻟﺨﺒﺮﺍء‬ + ‫ﺧﻔﻴﻔﺔ ﺍﻟﻮﺯﻥ ، ﺻﻐﻴﺮﺓ ﺍﻟﺤﺠﻢ ﻭ ﻣﻨﺎﺳﺒﺔ ﻟﻨﻈﺎﻡ‬ ، ‫ﺍﻻﺳﺘﻘﺒﺎﻝ ﺍﻟﻤﺘﻌﺪﺩ ﺍﻟﺘﻐﺬﻳﺔ ، ﻣﺨﺎﺭﺝ ﺍﻹﺷﺎﺭﺍﺕ ﻗﻮﻳﺔ‬ . ‫ﺻﻨﺎﻋﺔ ﺟﻴﺪﺓ‬ Jacek Pawlowski - TELE-satellite Test Center Poland . ‫ﻟﻴﺴﺖ ﺍﺧﺘﻴﺎﺭ ﻫﻮﺍﺓ ﺍﺻﻄﻴﺎﺩ ﺍﻹﺷﺎﺭﺍﺕ ﺍﻟﻀﻌﻴﻔﺔ‬ TECHNIC DATA Manufacturer Shenzhen Xiangcheng Electric Technology Co., Ltd. Internet www.skytrack.cn/www.jiuzhou.com.cn E-mail jerrychu@skytrack.cn / hxymar@jiuzhou.com.cn Telephone +86 755 26715445/26947236 Fax +86 755 26947266/26715408 Model JSU33 Function Universal Ku-Band Single LNB Input Frequency 10.7 GHz – 12 GHz Output Frequency 950 MHz – 2150 MHz LOF Initial Accuracy 1 MHz @ 25°C LOF Thermal Drift 2 MHz (-30 ~ +60°C) Noise Figure 0.6 dB max. @ 25°C Conversion gain 60 dB min. DC Current consumption 120 mA max. 58 TELE-satellite & Broadband — 06-07/2009 — www.TELE-satellite.com