Datasheet

Data+
Data-
Clk+
Clk-
Video
Patterm
Generator
1000 mVpp
Differential
Coax
Coax
Coax
Coax
Coax
Coax
Coax
Coax
SN75DP122A
SMA
SMA
SMA
SMA
(4)
R
T
R
T
(5)
AVcc
R
T
R
T
Jitter Test
Instrument
(2,3)
TTP 4
TTP 2TTP 1
FR4 PCBtrace
(1)
&
ACcouplingCaps
FR4 PCBtrace
RX
+EQ
OUT
RX
+EQ
OUT
SMA
SMA
SMA
SMA
TTP 3
Jitter Test
Instrument
(2,3)
A
VCC
Driver
50 W
+
-
50 W
I
OS
0Vor3.6V
SN75DP122A
www.ti.com ............................................................................................................................................................................................ SLLS939 – NOVEMBER 2008
(1) The FR4 trace between TTP1 and TTP2 is designed to emulate 8 " of FR4, a connector, and another 8 " of FR4.
(2) All Jitter is measured at a BER of 10
– 12
(3) Residual jitter reflects the total jitter measured at TTP4 minus the jitter measured at TTP1
(4) AVCC = 3.3 V
(5) R
T
= 50 Ω
Figure 22. TMDS Jitter Measurements
Figure 23. TMDS Main Link Short Circuit Output Circuit
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