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參數(shù)資料
| 型號： | TA0321 |
| 廠商： | 意法半導體 |
| 英文描述： | TECHNICAL ARTICLE |
| 中文描述： | 技術文章 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大小： | 170K |
| 代理商： | TA0321 |
Rev 1
1/12
January 2006
12
TA0321
TECHNICAL ARTICLE
Lightning protection for LNB supply and control voltage regulator
Introduction
Communication satellites operate within two frequency bands for TV/Broadband service broadcast
signals, C Band and Ku Band. The C Band overall frequency spectrum is 4.0 GHz - 8.0 GHz, while the Ku
Band overall frequency spectrum is 10.7 GHz - 18.4 GHz.
Within these bands each satellite has a specific uplink and downlink frequency allocation.
For example:
■
Ku Band downlink frequency is 10.7 GHz-12.75 GHz and uplink frequency is 17.3 GHz-17.8 GHz.
■
C Band downlink frequency is 3.7 GHz-4.2 GHz and uplink frequency is 5.925 GHz-6.425 GHz
To use the frequencies that are available for satellite broadcast as efficiently as possible, and to
accommodate an additional number of channels within a given frequency band, the transmission signal
can be formatted to be either vertical and horizontal, or circular right-hand and circular left-hand
simultaneously per frequency.
UPLINK
DOWNLINK
www.st.com
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