PBL38650-2 Просмотр технического описания (PDF) - Ericsson

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производитель

PBL38650-2

Subscriber Line Interface Circuit

Ericsson  

PBL 386 50/2

Parameter

Ref

fig Conditions

Min

Four-wire to longitudinal balance, BFLE

4 0.2 kHz < f < 3.4 kHz

40

BFLE = 20 · Log

ERX

VLo

Two-wire return loss, r

r = 20 · Log |ZTR + ZL|

|Z - Z |

TR

L

TIPX idle voltage, VTi

RINGX idle voltage, VRi

V

TR

Four-wire transmit port (VTX)

Overhead voltage, VTXO, IL > 18mA

5

On-hook, IL < 5mA

Output offset voltage, ∆VTX

Output impedance, z

TX

Four-wire receive port (RSN)

Receive summing node (RSN) DC voltage

Receive summing node (RSN) impedance

Receive summing node (RSN)

current (I ) to metallic loop current (I )

RSN

L

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 <5 mA

active, IL <5 mA

tip open, I <5 mA

L

active, I <5 mA

L

Load impedance > 20 kΩ,

1% THD, Note 4

0.2 kHz < f < 3.4 kHz

IRSN = -155 µA

0.2 kHz < f < 3.4 kHz

0.3 kHz < f < 3.4 kHz

27

20

1.35

0.55

-100

1.15

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

0.3 kHz < f < 3.4 kHz

f = 8.0 kHz, 12 kHz, 16 kHz

-0.20

-1.0

Typ

Max

50

35

22

- 1.3

VBat +3.0

V +3.0

Bat

V +4.3

Bat

0

100

15

50

1.25

1.35

8

20

200

0.10

0.1

Unit

dB

dB

dB

V

V

V

V

VPeak

VPeak

mV

Ω

V

Ω

ratio

dB

dB

C

VLo

RLT

RLR

TIPX

VTX

VTR PBL 386 50/2

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

RT = 60 kΩ, RRX = 60 kΩ

RL

EL

4

C

ILDC

TIPX

VTX

PBL 386 50/2

RINGX RSN

RT

VTXO

RRX

Figure 5. Overhead voltage, VTXO, four-

wire transmit port

1

ωC

<< RL, RL = 600 Ω

R

T

=

60

kΩ,

R

RX

=

60

kΩ

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