am79514 Advanced Micro Devices, am79514 Datasheet - Page 14

• Manufacturer Part Number: am79514
• Description: Subscriber Line Interface Circuit
• Manufacturer: Advanced Micro Devices

TEST CIRCUITS
14
V
R
R
2
2
1
L
L
C
L-T Long. Bal. = 20 log (V
L
L-4 Long. Bal. = 20 log (V
4-L Long. Sig. Gen. = 20 log (V
S1
A. Two- to Four-Wire Insertion Loss
<< R
S2 Open, S1 Closed
V
V
L
C. Longitudinal Balance
S2 Closed, S1 Open
AB
I
C
L
L2–4
= 20 log (V
V
A(TIP)
B(RING)
R
L
2
R
L
2
SLIC
L
AGND
RSN
VTX
AB
TX
TX
/ V
A(TIP)
/ V
B(RING)
/ V
L
L
L
SLIC
AB
)
)
/ V
)
RSN
VTX
RX
)
R
R
T
RX
Am79514 Data Sheet
S2
R
T
R
B. Four- to Two-Wire Insertion Loss and Balance Return Signal
RX
V
AB
V
RX
V
S
R
L
D. Two-Wire Return Loss Test Circuit
I
BRS = 20 log (V
Note:
ZD is the desired impedance (e.g., the
characteristic impedance of the line).
R
L4–2
L
R
R
= –20 log (2 V
A(TIP)
B(RING)
= 20 log (V
Z
V
SLIC
D
M
AGND
Z
RSN
AB
TX
IN
VTX
M
/ V
/ V
/ V
B(RING)
A(TIP)
TX
AB
S
)
SLIC
)
)
AGND
RSN
VTX
R
R
R
T
T
V
RX
RX
R
RX