PBL386212QNT Просмотр технического описания (PDF) - Ericsson

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производитель

PBL386212QNT

Subscriber Line Interface Circuit

Ericsson  

PBL 386 21/2

Parameter

Ref

fig Conditions

Min

Four-wire to longitudinal balance, BFLE

4 0.2 kHz < f < 4.0 kHz

40

BFLE = 20 • Log

ERX

VLo

Two-wire return loss, r

r = 20 • Log |ZTR + ZL|

|ZTR - ZL|

TIPX idle voltage, VTi

RINGX idle voltage, VRi

VTR

Four-wire transmit port (VTX)

Overload level, VTXO

5

On-hook, IL < 5mA

Output offset voltage ∆VTX

Output impedance, zTX

Four-wire receive port (RSN)

Receive summing node (RSN) DC voltage

Receive summing node (RSN) impedance

Receive summing node (RSN)

current (IRSN) to metallic loop current (IL)

gain,αRSN

Frequency response

Two-wire to four-wire, g2-4

6

0.2 kHz < f < 1.0 kHz

1.0 kHz < f < 3.4 kHz, Note 3

active, IL = 0 mA

active, IL = 0 mA

active, IL = 0 mA

Load impedance > 20 kΩ,

1% THD, Note 4

0.2 kHz < f < 3.4 kHz

IRSN = -55 µA

0.2 kHz < f < 3.4 kHz

0.3 kHz < f < 3.4 kHz

27

20

1.0

1.0

-100

1.15

relative to 0 dBm, 1.0 kHz. ERX = 0 V

0.3 kHz < f < 3.4 kHz

-0.20

f = 8.0 kHz, 12 kHz, 16 kHz

-1.0

Typ

Max

50

35

22

- 1.1

VBat +2.5

VBat +3.6

0

100

15

50

1.25

1.35

8

20

200

0.10

0.1

Unit

dB

dB

dB

V

V

V

VPeak

VPeak

mV

Ω

V

Ω

ratio

dB

dB

C

VLo

RLT

RLR

TIPX

VTX

VTR PBL 386 21/2

RT

E RX

RINGX RSN

RRX

Figure 4. Metallic to longitudinal and

four-wire to longitudinal balance

1

ωC

<<

150

Ω, RLT

=RLR

=RL

/2 =300Ω

R

T

=

120

kΩ,

R

RX

=

60

kΩ

C

TIPX

VTX

Figure 5. Overload level, VTXO, four-wire

transmit port

RL

ILDC

PBL 386 21/2

RT

VTXO

1

ωC

<<

R,

L

R

L

=

600

Ω

EL

RINGX RSN

RT = 120 kΩ, RRX = 60 kΩ

RRX

4

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