am79m535 Advanced Micro Devices, am79m535 Datasheet - Page 15

• Manufacturer Part Number: am79m535
• Description: Metering Subscriber Line Interface Circuit
• Manufacturer: Advanced Micro Devices

TEST CIRCUITS
V
R
R
L
2
2
1/ C << R
V
L
L
S
C
V
L
S1
R
R
V
A. Two- to Four-Wire Insertion Loss
L
AB
V
L
I
L2-4
R
A(TIP)
B(RING)
R
2
2
L
L
= –20 log (V
SLIC
V
M
A(TIP)
B(RING)
AGND
RSN
VTX
Z
Z
D
SLIC
IN
TX
AGND
RSN
VTX
/ V
B(RING)
A(TIP)
AB
)
SLIC
D. Two-Wire Return Loss Test Circuit
R
R
RSN
VTX
T
RX
C. Longitudinal Balance
SLIC Products
R
S2
T
B. Four- to Two-Wire Insertion Loss and Balance Return Signal
R
V
RX
AB
R
R
RX
V
T
RX
R
L
Note:
Z
teristic impedance of the line.)
R
D
L
I
is the desired impedance (e.g., the charac-
= 20 log (2 V
L4-2
BRS = 20 log (V
A(TIP)
B(RING) RSN
4-L Long. Sig. Gen. = –20 log (V
L-4 Long. Bal. = –20 log (V
= –20 log (V
L-T Long. Bal. = –20 log (V
SLIC
AGND
S2 Closed, S1 Open
VTX
M
S1 Closed, S2 Open
/ V
TX
AB
S
)
/ V
/ V
RX
RX
)
)
TX
R
R
/ G
AB
T
RX
V
TX
L
/ V
RX
/ V
R
L
TMG
)
V
RX
L
V
)
)
15
MG