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DMI Compliance & Sink Characterization Using DTG5000 Series Data Timing Generator
Application Note
10
www.tektronix.com/signal_sources
10
Test Adapters
The approach using the DTGM32 and the AFG allows
for thorough compliance and pre compliance testing
with a much simpler setup than the AWG method.
This method was designed for pre/compliance testing
only since the maximum available jitter just meets
specification requirement. If testing is required above
the specification (as in characterization), then the
AWG method would be the recommended solution.
Reliable connections are key to maintaining precision
and signal integrity for all HDMI tests. There are two
types of test adapter sets available. For most of the
Sink tests devices, the plug-type adapters (TPA-P) set
and r
eceptacle-type adapters (TPA-R) set are well
suited for making the primary connection to the
Device-under-test (DUT). Figure 9 shows a TPA-P
plug-type test adapter.
F
igure 9.
TPA-P-TDR (013-A013-50) adapter.
Table 4.
DTG5000 Series files used by TDSHT3 in HDMI compliance tests.
DTG5000 Series Files Used in HDMI Compliance Test by TDSHT3
Test Pix Clock 861B ID Filename Type Image Description
Sink Minimum 25.2 MHz 480 p@60 Hz 640x480 p 60 Hz.dtg
8-5 Diff. Sensitivity
27.027 MHz 480 p@60 Hz 720x480 p 60 Hz.dtg US
27.0 MHz 576 p@50 Hz 720x576 p 50 Hz.dtg EU Normal
74.25 MHz 1080 i@60 Hz 1920x1080 i 60 Hz.dtg US
74.25 MHz 720 p@50 Hz 1280x720 p 50 Hz.dtg EU
148.5 MHz 1080 p@60 Hz 1920x1080 p 60 Hz.dtg
Sink Intra-Pair Skew 25.2 MHz 480 p@60 Hz 640x480 p 60 Hz IP.dtg
8-6
27.027 MHz 480 p@60 Hz 720x480 p 60 Hz IP.dtg US
27.0 MHz 576 p@50 Hz 720x576 p 50 Hz IP.dtg EU Diff. Timing Offset
74.25 MHz 1080 i@60 Hz 1920x1080 i 60 Hz IP.dtg US
74.25 MHz 720 p@50 Hz 1280x720 p 50 Hz IP.dtg EU
148.5 MHz 1080 p@60 Hz 1920x1080 p 60 Hz IP.dtg Gray RGB
Sink
Jitter
T
olerance 25.2 MHz 480 p@60 Hz 640x480 p 60 Hz.dtg
8-7
27.027 MHz 480 p@60 Hz 720x480 p 60 Hz.dtg US
27.0 MHz 576 p@50 Hz 720x576 p 50 Hz.dtg EU
74.25 MHz 1080 i@60 Hz 1920x1080 i 60 Hz.dtg US Normal
74.25 MHz 720 p@50 Hz 1280x720 p 50 Hz.dtg EU
148.5 MHz 1080 p@60 Hz 1920x1080 p 60 Hz.dtg
Cable
Cable Da
ta 27.027 MHz 480 p@60 Hz 720x480 p 60 Hz CT.dtg US
5-3 Eye Diagram
27.0 MHz
576 p@50 Hz
720x576 p 50 Hz CT
.dtg
EU
74.25 MHz
1080 i@60 Hz
1920x1080 i 60 Hz CT
.dtg
US
VH=3.3
V
VL=2.9
V
74.25 MHz
720 p@50 Hz
1280x720 p 50 Hz CT.dtg EU
148.5 MHz 1080 p@60 Hz 1920x1080 p 60 Hz CT.dtg
Most Likely Test Condition
Optional
Only If
The Maximum Is 27MHz
27.027 MHz
27.0 MHz
27.027 MHz
27.0 MHz
74.25 MHz
74.25 MHz
148.5 MHz
27.027 MHz
27.0 MHz
74.25 MHz
74.25 MHz
148.5 MHz
27.027 MHz
27.0 MHz
74.25 MHz
74.25 MHz
148.5 MHz