LUCL9311AP-D AGERE [Agere Systems], LUCL9311AP-D Datasheet - Page 39

• Manufacturer Part Number: LUCL9311AP-D
• Description: Line Interface and Line Access Circuit Full-Feature SLIC with High Longitudinal Balance, Ringing Relay,and GR-909 Test Access
• Manufacturer: AGERE [Agere Systems]

July 2001
Agere Systems Inc.
Special Functions
Line Test
Table 20 shows design equations to measure the various line voltages and currents.
Table 20. TESTLEV Output Options
Test Off
V
Tip-to-Ring Voltage
Tip-to-Ground Voltage
Ring-to-Ground Voltage
VTX, Zero Current (tip
VTX, dc Current Tip/Ring
VTX, dc Current Ring
VTX, dc Current Ring
VITR, Zero Current (tip
VITR, ac Current (tip
REF
open, ring open)
(tip closed, ring closed)
Ground (tip closed, ring
open)
Ground (tip open, ring
closed)
open, ring open)
closed, ring closed)
Test Mode
(continued)
(continued)
(V
V
High Impedance
V
V
V
V
V
V
V
V
V
V
V
TESTLEV
TL
TIP
TL
RING
TL
TESTLEV
TESTLEV
TESTLEV
TESTLEV
TESTLEV
TESTLEV
x V
V
+ V
ROCUR
ROCUR
V
V
TIP
REF
ZEROCUR
ZAC
= V
= V
= V
= –75 (1 – 0.0075 |V
TL
REF
– V
= –75 (1 – 0.0075 |V
+ V
TESTLEV
TESTLEV
TESTLEV
RING
+ V
= V
= V
= 20 V/A x I
= 10 V/A x I
= –10 V/A x I
= V
= 300 V/A x I
OFFSET
Relationship
OFFSET
REF
) = 75 (1 – 0.0075 |V
ZEROCUR
ZAC
– (V
– (V
– (V
+ V
REF
REF
REF
OFFSET
TIP-to-RING
TIP-to-RING
TIP-to-RING
TIP-to-RING
+ V
+ V
+ V
TL
OFFSET
OFFSET
OFFSET
TL
|) x V
|) x V
+ V
+ V
+
+
TL
)
)
)
TL
TL
Ringing Relay, and GR-909 Test Access
ZE-
ZE-
+
|)
—
Unity follower on V
surement calibration state, use the V
in the secondary control state table.
Difference amp.
Inverting amp.
Inverting amp.
Unity follower on VTX close to V
SET
calibration state. In the secondary control state
table, use tip amp or ring amp for single-ended
current measurement calibration. Use tip and
ring amp for differential current measurement
calibration. Do not use the disconnect mode
for current calibration.
Differential current.
Single-ended voltage.
Single-ended voltage.
Unbuffered output of VITR close to V
OFFSET
surement calibration state. In the secondary
control state table, use tip amp or ring amp for
single-ended current measurement calibra-
tion, use tip and ring amp for differential cur-
rent measurement calibration. Do not use the
disconnect mode for current calibration.
—
+ V
+ V
OFFSET
ACOFFSET
. This is the current measurement
Comments
. This is the current mea-
REF
. This is the voltage mea-
REF
+ V
REF
REF
AXOFF-
+ V
state
AX-
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