PBL 3766
Ref.
Fig.
Parameter
Conditions
Min
Typ
Max
Unit
Two-wire return loss, r
|ZTRX + ZL|
|ZTRX - ZL|
r = 20 · log
ZTRX ≈ ZL = nom. 600Ω, Note 3
0.2 kHz ≤ f ≤ 0.5 kHz
0.5 kHz ≤ f ≤ 1.0 kHz
1.0 kHz ≤ f ≤ 3.4 kHz
25
27
23
30
32
25
-5
dB
dB
dB
V
TIPX idle voltage, VTi
active, IL = 0
stand-by, IL = 0
active, IL = 0
stand-by, IL = 0
0
-43
-48
V
V
V
RINGX idle voltage, VRi
Four-wire transmit port (VTX)
Overload level, VTXO
5
Load impedance > 20 kohms,
1% THD, Note 4
3.1
VPk
Output offset voltage, ∆VTX
PBL 3766
PBL 3766/6
-40
-55
+40
+55
20
mV
mV
ohm
Output impedance, zTX
0.2 kHz < f < 3.4 kHz
<5.0
Four-wire receive port (RSN)
RSN dc voltage, VRSN
IRSN = 0
0
V
RSN impedance, zRSN
RSN current (IRSN) to metallic loop current
(IL) gain, αRSN
0.3 kHz ≤ f ≤ 3.4 kHz
0.3 kHz ≤ f ≤ 3.4 kHz
<5
1000
20
ohm
ratio
Frequency response
Two-wire to four-wire, g2-4
6
6
6
0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. ERX = 0 V
0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. EL = 0 V
0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. EL = 0 V
-0.1
-0.1
-0.1
0
0
0
+0.1
+0.1
+0.1
dB
dB
dB
Four-wire to two-wire, g4-2
Four-wire to four-wire, g4-4
Insertion loss
Two-wire to four-wire, G2-4
PBL 3766
PBL 3766/6
Four-wire to two-wire, G4-2
PBL 3766
PBL 3766/6
6
6
6
0 dBm, 1.0 kHz, Note 5
-0.20
-0.25
0
0
+0.20
+0.25
dB
dB
0 dBm, 1.0 kHz, Notes 5, 6
0 dBm, 1.0 kHz, Notes 5, 6
-0.20
-0.25
-0.3
0
0
0
+0.20
+0.25
+0.3
dB
dB
dB
Four-wire to four-wire, G4-4
Figure 4. Metallic to longitudinal (BMLE
)
TIPX
27/21
VTX
19/14
and four-wire to longitudinal (BFLE
balance.
)
R
LT
C
E
R
T
TR
PBL 3766
E
1
RX
V
<< 150 ohms, RLR = RLT = 300 ohms,
L
O
R
LR
ωC
RINGX
28/22
RSN
16/12
R
RT = 600 kohms, RRX = 300 kohms
RX
C
TIPX
VTX
27/21
19/14
Figure 5. Overload level, VTXO, four-wire
transmit port.
R
L
V
I
R
TXO
Ldc
T
PBL 3766
1
<< R L , RL = 600 ohms,
RINGX
28/22
RSN
16/12
E
ωC
L
R
RX
RT = 600 kohms, RRX = 300 kohms
4-4
ERICSSON [ ERICSSON ]
