Datasheet

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Data +
Data −
Clk+
Clk−
Video Patterm
Generator
1000 mVpp
Differential
Coax
Coax
Coax
Coax
Coax
Coax
Coax
Coax
<2” 50
Ω
Transmission Line
5m 28AWG
HDMI Cable
TMDS341A
RX
+
EQ
M
U
X
OUT
0dB
RX
+
EQ
M
U
X
OUT
0dB
<2” 50Ω
Transmission Line
<2” 50
Ω
Transmission Line
<2” 50 Ω
Transmission Line
SMA
SMA
SMA
SMA
SMA
SMA
SMA
SMA
AVcc
R
T
R
T
AVcc
R
T
R
T
Jitter Test
Instrument
Jitter Test
Instrument
TP3TP2TP1
TMDS341 input equalization gain vs. 5m DVI/HDMI cable response
−18
−16
−14
−12
−10
−8
−6
−4
−2
0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
f − Frequency − MHz
Gain − dB
Inversed TMDS341 EQ Gain
28 AWG 5m HDMI Cable
28 AWG 5m DVI Cable
TMDS341A
SLLS702B – MAY 2006 – REVISED MARCH 2007
PARAMETER MEASUREMENT INFORMATION (continued)
A. All jitters are measured in BER of 10
-12
B. The residual jitter reflects the total jitter measured at the TMDS341A output, TP3, subtract the total jitter from the
signal generator, TP1
Figure 8. Jitter Test Circuit
Figure 9 shows the frequency loss response from a 5m 28AWG HDMI cable and a 5m 28AWG DVI cable. The
TMDS341A built-in passive input equalizer compensates for ISI. For an 8-dB loss HDMI cable, the TMDS341A
typically reduces jitter by 60 ps from the device input to the device output.
Figure 9. S-Parameter Plots of 5-m DVI and HDMI Cables
13
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