XRT75R12IB datasheet(27/89 Pages) EXAR

Part #	XRT75R12IB

Description	TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR

PDF	89 Pages

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Manufacturer	EXAR [Exar Corporation]

Direct Link	http://www.exar.com

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27 / 89 page

PRELIMINARY

XRT75R12

TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR

REV. P1.0.2

3.5.4

Interference Tolerance

For E3 mode, ITU-T G.703 Recommendation specifies that the receiver be able to recover error free clock and

data in the presence of a sinusoidal interfering tone signal. For DS3 and STS-1 modes, the same

recommendation is being used. Figure 10 shows the configuration to test the interference margin for DS3/

STS1. Figure 11 shows the set up for E3.

FIGURE 10. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1

FIGURE 11. INTERFERENCE MARGIN TEST SET UP FOR E3.

Sine Wave

Generator

Pattern Generator

2 23 -1 PRBS

Attenuator

∑

Test

Equipment

DUT

XRT75R12

DS3 = 22.368 MHz

STS-1 = 25.92 MHz

Cable Simulator

Attenuator 1

Sine Wave

Generator

17.184mHz

Signal Source

223-1 PRBS

Attenuator 2

∑

Test

Equipment

DUT

XRT75R12

Cable Simulator

XRT75R12IB Datasheet(PDF) 27 Page - Exar Corporation