AM79M574-1JC ETC2 [List of Unclassifed Manufacturers], AM79M574-1JC Datasheet - Page 15

• Manufacturer Part Number: AM79M574-1JC
• Description: Metering Subscriber Line Interface Circuit
• Manufacturer: ETC2 [List of Unclassifed Manufacturers]

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