PBL3766 Просмотр технического описания (PDF) - Ericsson
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PBL3766 Datasheet PDF : 18 Pages
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PBL 3766
Parameter
Two-wire return loss, r
TIPX idle voltage, VTi
RINGX idle voltage, VRi
Four-wire transmit port (VTX)
Overload level, VTXO
Output offset voltage, ∆VTX
PBL 3766
PBL 3766/6
Output impedance, z
TX
Ref.
Fig. Conditions
r = 20 · log |ZTRX + ZL|
|ZTRX - ZL|
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
active, IL = 0
stand-by, IL = 0
active, IL = 0
stand-by, IL = 0
5 Load impedance > 20 kohms,
1% THD, Note 4
0.2 kHz < f < 3.4 kHz
Four-wire receive port (RSN)
RSN dc voltage, VRSN
RSN impedance, zRSN
RSN current (IRSN) to metallic loop current
(IL) gain, αRSN
IRSN = 0
0.3 kHz ≤ f ≤ 3.4 kHz
0.3 kHz ≤ f ≤ 3.4 kHz
Frequency response
Two-wire to four-wire, g2-4
Four-wire to two-wire, g4-2
Four-wire to four-wire, g4-4
6 0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. ERX = 0 V
6 0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. EL = 0 V
6 0.3 kHz < f < 3.4 kHz relative
to 0 dBu, 1.0 kHz. E = 0 V
L
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
Four-wire to four-wire, G4-4
6 0 dBm, 1.0 kHz, Note 5
6 0 dBm, 1.0 kHz, Notes 5, 6
6 0 dBm, 1.0 kHz, Notes 5, 6
C
V LO
RLT
RLR
TIPX
27/21
VTX
19/14
ETR PBL 3766
RINGX
28/22
RSN
16/12
C
RL
TIPX
27/21
VTX
19/14
I Ldc
PBL 3766
EL
RINGX
RSN
28/22
16/12
RT
RRX
E RX
RT
V TXO
RRX
4-4
Min
Typ
Max
Unit
25
30
dB
27
32
dB
23
25
dB
-5
V
0
V
-43
V
-48
V
3.1
VPk
-40
+40
mV
-55
+55
mV
<5.0
20
ohm
0
V
<5
20
ohm
1000
ratio
-0.1
0
-0.1
0
-0.1
0
+0.1
dB
+0.1
dB
+0.1
dB
-0.20 0
-0.25 0
+0.20 dB
+0.25 dB
-0.20 0
-0.25 0
-0.3
0
+0.20 dB
+0.25 dB
+0.3
dB
Figure 4. Metallic to longitudinal (BMLE)
and four-wire to longitudinal (BFLE)
balance.
1
ωC << 150 ohms, RLR = RLT = 300 ohms,
RT = 600 kohms, RRX = 300 kohms
Figure 5. Overload level, VTXO, four-wire
transmit port.
1
ωC << RL, RL = 600 ohms,
RT = 600 kohms, RRX = 300 kohms
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