參數(shù)資料
型號(hào): L3000S
廠商: 意法半導(dǎo)體
英文描述: SLIC Kit Optimized for Applications with Both First and Second Generation Combos(用于短波/超短波通信系統(tǒng)的用戶線接口)
中文描述: 用戶接口工具包優(yōu)化與包括第一代和第二代功放音箱(用于短波/超短波通信系統(tǒng)的用戶線接口應(yīng)用)
文件頁(yè)數(shù): 11/32頁(yè)
文件大?。?/td> 298K
代理商: L3000S
If, for example, the loop resistance is 400
the
GDK outputwill be 0 only when the limiting current
valueis 40 or25mA.
The card controller can program consecutive Test
Mode and ConversationModewith differentlimiting
current in order to individuate the range of loop re-
sistanceasshownin theflow chartof fig.6.
The information of the Loop Resistance Range
can be very useful to optimize the transmission
characteristicsof the Line Card to eachline.
For example, if a second generation COMBO like
TS5070 is used the Card Controller can use this
informationto change the Tx, RX Gains and echo
cancellation characteristics into the programma-
ble COMBO improving the quality of 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
Figure 6:
Procedurefor Loop ResistanceEvaluation.
L3000S - L3092
11/32
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