PEB2256HT datasheet(123/490 Pages) INFINEON

Part #	PEB2256HT

Description	E1/T1/J1 Framer and Line Interface Component for Long and Short Haul Applications

PDF	490 Pages

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Manufacturer	INFINEON [Infineon Technologies AG]

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FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

123

2002-08-27

5.1.7

Receive Line Monitoring Mode

For short-haul applications like shown in Figure 43, the receive equalizer can be

switched into receive line monitoring mode (LIM0.RLM = 1). One device is used as a

short-haul receiver while the other is used as a short-haul monitor. In this mode the

receiver sensitivity is increased to detect an incoming signal of -20 dB resistive

attenuation. The required resistor values are given in Table 27.

Figure 43

Receive Line Monitoring

Using the receive line monitor mode and the hardware tristate function of transmit lines

XL1/2, the FALC56 now supports applications connecting two devices to one receive

Table 27

External Component Recommendations (Monitoring)

Parameter

This includes all parasitic effects caused by circuit board design.

Characteristic Impedance [

Ω]

100

110

1 (± 1 %) [Ω]100

110

2 (± 1 %) [Ω]100

110

3 (± 1 %) [Ω]430

470

2 : t1

1 : 1

FALC®

(Receiver)

FALC®

(Monitor)

RL1

E1/T1/J1

Receive

Line

LIM0.RLM=0

LIM0.RLM=1

RL2

RL1

RL2

t2 : t1

resistive -20 dB network

F0074

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