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參數(shù)資料
| 型號(hào)： | L3092 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Subscriber Line Interface(用于短波/超短波通信系統(tǒng)的用戶線接口) |
| 中文描述： | 用戶線接口（用于短波/超短波通信系統(tǒng)的用戶線接口） |
| 文件頁(yè)數(shù)： | 11/32頁(yè) |
| 文件大?。?/td> | 412K |
| 代理商： | L3092 |
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If, for example, the loop resistance is 400
the
GDK output will be 0 only when the limiting current
value is 40 or 25mA.
The card controller can program consecutive Test
Mode andConversationModewith different limiting
current in order to individuate the range of loop re-
sistanceas shownin the flow chart of fig. 6.
The information of the Loop Resistance Range
can be very useful to optimize the transmission
characteristics of the Line Cardto each line.
For example, if a second generation COMBO like
TS5070 is used the Card Controller can use this
information to change the Tx, RX Gains and echo
cancellation characteristics into the programma-
ble COMBO improving the qualityof the system.
Limiting Current
60mA
40mA
25mA
GDK = 0
(0 – 300) ohm
(0 – 650) ohm
(0 – 1300)ohm
GDK = 1
>300 ohm
>650 ohm
>1300 ohm
Figure6:
Procedurefor Loop ResistanceEvaluation.
L3000N - L3092
11/32
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