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Data +

Data -

Clk +

Clk -

Video

Patterm

Generator

800 mVppor

1200 mVpp

Differential

Coax

Coax

Coax

Coax

Coax

Coax

Coax

Coax

SN 75 DP 129

SMA

SMA

SMA

SMA

Avcc (4)

RT

RT

(5)

AVcc

RT

RT

Jitter Test

Instrument (2,3)

TTP 4

TTP 2

TTP 1

FR 4 PCBtrace

(1)

&

ACcouplingCaps

FR 4 PCBtrace

RX

+EQ

OUT

RX

+EQ

OUT

SMA

SMA

SMA

SMA

TTP 3

Jitter Test

Instrument (2,3)

Driver

50 W

+

-

IOS

50 W

0Vor3.6V

SN75DP129

SLAS583A – JANUARY 2008 – REVISED MARCH 2008

(1)

The FR4 trance between TTP1 and TTP2 is designed to emulate 8 inches of FR4, a connector, and another 8 inches

if FR4.

(2)

(3)

Residual jitter reflects the total jitter measured at TTP4 minus the jitter measured at TTP1.

(4)

AVCC = 3.3 V

(5)

Figure 16. TMDS Jitter Measurements

Figure 17. TMDS Main Link Short Circuit Output Circuit

14

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