am79m576a Advanced Micro Devices, am79m576a Datasheet - Page 15

• Manufacturer Part Number: am79m576a
• Description: Metering Subscriber Line Interface Circuit
• Manufacturer: Advanced Micro Devices

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