XRT75L00IV View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XRT75L00IV

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

Exar Corporation 

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REV. 1.0.2

XRT75L00

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

FIGURE 17. INTERFERENCE MARGIN TEST SET UP FOR DS3/STS-1

SINE WAVE

N

GENERATOR

DS3 = 22.368 MHz

STS-1 = 25.92 MHz

ATTENUATOR

Cable Simulator

DUT

XRT75L00

Test Equipment

PATTERN

S

GENERATOR

223 - 1 PRBS

FIGURE 18. INTERFERENCE MARGIN TEST SET UP FOR E3.

NOISE

N

GENERATOR

ATTENUATOR 1 ATTENUATOR 2

Pattern

S

Generator

Cable Simulator

DUT

XRT75L00

Test Equipment

MODE

E3

DS3

STS-1

TABLE 9: INTERFERENCE MARGIN TEST RESULTS

CABLE LENGTH (ATTENUATION)

INTERFERENCE TOLERANCE

0 dB

-14 dB

12 dB

-18 dB

0 feet

-17 dB

225 feet

-16 dB

450 feet

-16 dB

0 feet

-16 dB

225 feet

-15 dB

450 feet

-15 dB

29

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