參數(shù)資料
型號(hào): LE79555-4VC
英文描述: Telecommunication IC
中文描述: 通信集成電路
文件頁(yè)數(shù): 14/16頁(yè)
文件大?。?/td> 411K
代理商: LE79555-4VC
14
Le79555 Data Sheet
TEST CIRCUITS
R
T
R
RX
V
AB
V
L
R
L
2
I
L2-4
= 20 log (V
TX
/ V
AB
)
A. Two- to Four-Wire Insertion Loss
A(TIP)
B(RING)
AGND
VTX
RSN
SLIC
R
L
2
R
T
V
AB
A(TIP)
B(RING)
AGND
VTX
RSN
SLIC
R
L
R
RX
V
RX
I
L4-2
= 20 log (V
AB
/ V
RX
)
BRS = 20 log (V
TX
/ V
RX
)
B. Four- to Two-Wire Insertion Loss and Balance Return Signal
R
T
R
RX
R
L
2
R
L
2
V
RX
S1
C
S2
V
L
V
L
A(TIP)
B(RING)
AGND
VTX
RSN
SLIC
1
<< R
L
L-4 Long. Bal. = 20 log (V
TX
/ V
L
)
L-T Long. Bal. = 20 log (V
AB
/ V
L
)
4-L Long. Sig. Gen. = 20 log (V
L
/ V
RX
)
C. Longitudinal Balance
V
AB
S2 Open, S1 Closed
S2 Closed, S1 Open
ω
C
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