PBL 3766
Electrical Characteristics
0 °C < TAmb < 70 °C, VCC = +5 V ±5 %, VEE = -5 V ±5 %, VBat = -48 V, RSG = 0 ohm , RDC = 41.7 kohms, RD = ∞, ZL = 600 ohms,
CHP = 33 nF, CDC = 1.5 µF unless otherwise specified.
Ref
Fig.
Parameter
Conditions
Min
Typ
Max
Unit
Two-wire port
Overload level, VTRO
Input impedance, ZTRX
2
ZL = 600 ohms, 1% THD, Note 1
Note 2
3.1
VPk
Longitudinal impedance, ZLoT, ZLoR
Longitudinal current limit, ILoT, ILoR
Longitudinal to metallic balance, BLM
f < 100 Hz
25
20
40
ohm/wire
mApk/wire
active state, C2, C1 = 1, 0
IEEE standard 455-1985
0.2 kHz ≤ f ≤ 3 kHz
PBL 3766
PBL 3766/6
53
48
58
58
dB
dB
Longitudinal to metallic balance, BLME
3
3
4
4
|ELo|
B
LME = 20 · log
|VTR|
0.05kHz ≤ f ≤ 3.4kHz
PBL 3766
PBL 3766/6
Longitudinal to four-wire balance, BLFE
53
48
58
58
dB
dB
|ELo|
BLFE = 20 · log
|VTX|
0.05kHz ≤ f ≤ 3.4kHz
PBL 3766
PBL 3766/6
Metallic to longitudinal balance, BMLE
53
48
58
58
dB
dB
|ETR|
BMLE = 20 · log
, ERX = 0
|VLo|
0.2kHz ≤ f ≤ 3.4kHz
PBL 3766
PBL 3766/6
Four-wire to longitudinal balance, BFLE
50
48
55
55
dB
dB
|ERX|
BFLE = 20 · log
, ETR source removed
40
|VLo|
0.2kHz ≤ f ≤ 3.4kHz
55
dB
C
TIPX
27/21
VTX
19/14
Figure 2. Overload level, VTRO, two-wire
port.
R
V
R
I
L
TRO
T
Ldc
PBL 3766
E
RX
1
RINGX
28/22
RSN
16/12
<< R L , RL = 600 ohms,
ωC
R
RX
RT = 600 kohms, RRX = 300 kohms
TIPX
27/21
VTX
19/14
Figure 3. Longitudinal to metallic (BLME
)
E
R
R
LO
LT
and longitudinal to four-wire (BLFE
)
C
balance.
V
V
R
TX
TR
T
PBL 3766
1
LR
<< 150 ohms, RLR = RLT = 300 ohms,
RINGX
28/22
RSN
16/12
ωC
RT = 600 kohms, RRX = 300 kohms
R
RX
4-3
ERICSSON [ ERICSSON ]
