Keysight Technologies HDMI 2.0 Physical Layer Compliance Tests

Keysight Technologies HDMI 2.0 Physical Layer Compliance Tests
HDMI Physical Layer
Compliance Testing
- 2.0 and beyond
September 23, 2014
Stefan Friebe
R&D Engineer/HDMI Program Lead
Digital & Photonic Test
Keysight Technologies
Content
1. HDMI Overview
• HDMI organization
• HDMI 2.0 new features
• HDMI 2.0 timeline
2. Keysight HDMI 2.0 physical layer compliance test solutions
• Source Compliance test solution
• Cable Assembly compliance test solution
• Sink Compliance test solution
3. What lies beyond 2.0?
HDMI 2.0 webcast
Page 2
HDMI Organizational Structure
•
HDMI LLC is responsible up to HDMI 1.4b
•
Ruled by “7C” (7 founding companies)
•
No open industry participation in the definition of the Spec
•
CTS (Compliance Test Spec) includes vendor-specific test procedures
•
HDMI Forum is responsible for HDMI 2.0 and later
•
Open industry consortium with 80+ members,1000+ Adopters
•
Keysight is a member of the Technical Working Group and Test Subgroup
•
Keysight was recently elected into Board of Directors
•
Generic CTS describes vendor independent test procedures
•
MOI’s (method of implementation) is created by each T&M vendor
•
MOI‘s of all T&M vendors are linked in the CTS document available to
Adopters
HDMI 2.0 webcast
Page 3
HDMI 2.0 Features at a Glance
 Up to 18 Gbps bandwidth
 Up to 4K @ 50/60Hz Video format supported
 Up to 32 audio channels
 Up to 1536 kHz audio sample frequency
 Dual viewing
 Multi-stream audio
 CEC extensions
 21:9 Aspect Ratio
 Dynamic Auto Lip-Sync
HDMI 2.0 webcast
Page 4
HDMI Feature Comparison
HDMI 2.0 webcast
Page 5
HDMI 2.0 timeline
Sept
2013
Oct
Dec

Feb
CTS document is available to Adopters
for download on http://www.hdmi.org
Sept
2014
 Announcement HDMI 2.0
 Current CTS version 2.0e
 1st version of generic CTS
 1st Test Event for MOI approval
 Another Test Event
•
All Keysight MOIs were successfully executed
•
All Keysight physical layer source & sink test MOIs are approved
•
First version of CTS 2.0 was released April 11th
•
CTS contains links to the individual MOIs for each Test ID
HDMI 2.0 webcast
Page 6
Authorized Test Centers
The HDMI Founders have established Authorized Testing Centers (ATC)
where licensed manufacturers can submit their products for compliance
testing.
HDMI 2.0 webcast
Page 7
HDMI 2.0 test solution overview from Keysight
Source Test
N5399C HDMI Electrical
Compliance Test Software
Cable Assembly
Test
Sink Test
(ParBERT)
Sink Test (AWG)
N5990A Automatic SW
for HDMI compliance
N5990A Automatic SW
for HDMI compliance
Protocol Test
U4998A SW for
HDMI compliance
SW
HW
E5071C Option TDR
ENA Network Analyzer
DSO90000A
Infiniium
real time
scope
13 GHz
Fixture
E4887A
ParBERT
TMDS Signal
Generator
new
Cable Emulator
Signal
Conditioning
U4998A (N5998A)
HDMI 1.4
protocol analyzer/
generator
HDMI 2.0
TPA
M8190A/M8195A
AWG
HDMI 2.0 TPA
HDMI 2.0 TPA
HDMI 2.0 TPA
DUT
Tx
Rx
Rx
Source
Cable
Sink
Protocol Test on
U4998A is
supported up to
HDMI 1.4b
For HDMI 2.0 third
party protocol
testers are
supported in
Valiframe SW
Tx
Source
Sink
HDMI 2.0 webcast
Page 8
Rx
HDMI 2.0 test solution overview from Keysight
Source Test
N5399C HDMI Electrical
Compliance Test Software
Cable Assembly
Test
Sink Test
(ParBERT)
Sink Test (AWG)
N5990A Automatic SW
for HDMI compliance
N5990A Automatic SW
for HDMI compliance
Protocol Test
U4998A SW for
HDMI compliance
SW
HW
E5071C Option TDR
ENA Network Analyzer
DSO90000A
Infiniium
real time
scope
13 GHz
Fixture
E4887A
ParBERT
TMDS Signal
Generator
new
Cable Emulator
Signal
Conditioning
U4998A (N5998A)
HDMI 1.4
protocol analyzer/
generator
M8190A/M8195A
AWG
N1080B
N1080B
N1080B
HDMI 2.0 TPA
DUT
Tx
Rx
Rx
Source
Cable
Sink
Protocol Test on
U4998A is
supported up to
HDMI 1.4b
For HDMI 2.0 third
party protocol
testers are
supported in
Valiframe SW
Tx
Source
Sink
HDMI 2.0 webcast
Page 9
Rx
The HDMI Interface
HDMI 1.4
HDMI 2.0 webcast
Page 10
The HDMI Interface
HDMI 2.0: Interface Changes
HDMI 2.0 webcast
Page 11
CTS Requirements: Tests Identified in HDMI
HDMI 1.4b Test
Test Point
Coverage
Measurement
Type Required
Test Point
Coverage
Measurement
Type Required
HF1-1 VL and VSwing
TP1
Single Ended
HDMI 2.0 Test
7-2 TMDS VL
TP1
Single Ended
7-3 Voff
TP1
Single Ended
7-4 TMDS Rise and
Fall Times
TP1
Differential
HF1-2 Rise and Fall
Times
TP1
7-6 TMDS Inter Pair
Skew
TP1
Differential
HF1-3 Inter Pair Skew
TP1
7-7 TMDS Intra-Pair
Skew
TP1
Single Ended
HF1-4 Intra-Pair Skew
TP1
HF1-5 Differential
Voltage
TP1
7-8 TMDS Clock Duty
Cycle
TP1
Differential
HF1-6 Clock Duty
Cycle/Level
TP1
7-9 TMDS Clock
Jitter
TP1
Differential
HF1-7 Clock Jitter
TP2EQ
7-10 TMDS Data Eye
TP1
Differential
HF1-8 Data Eye
TP2EQ
Differential
Differential
Single Ended
Differential
Differential
Single Ended
Single Ended
New
HDMI 2.0 webcast
Page 12
CTS Requirements: Test points (TP1, TP2EQ)
HDMI Cable
HDMI RX
HDMI TX
EQ
TP1
TP1’
TP2
TP2EQ
Differential
Eye Diagram
Jitter
Measurement,
etc.
TP1
Oscilloscope Signal Processing
HDMI Rec
Connector
Fixture DeEmbed
T-LineEmbed
Optional
(TPA s4p)
TP1
TP1’
Modeled
Skew
Reference
Equalization
Required
Required.
Std s4p file,
Std model,
skew values TP2
TP2EQ
HDMI 2.0 webcast
Page 13
Test Device: Control and Capability
For your device:
-HDMI1.4b & HDMI2.0?
-What are the Formats it can do?
-HDCP On/Off?
-How are you going to control it?
Flex
EDID
HDMI 2.0 webcast
Page 14
Keysight HDMI Source Test Solution
N5399C HDMI Source
Compliance Software
Infiniium DSO91304A
N5380B SMA
Probe Head (6)
Infiniium DSO90000 X-series
1169A Probe
Amplifiers(4)
N5444A SMA
Probe Head (6)
N280XA Probe
Amplifiers(4)
Keysight U3020AS26 Switch
VTF-501
FlexEDID
BIT-0101-0200-0
Switches
N2809A Precision
Probe Cal software
E364xA
HDMI 2.0 webcast
Page 15
HDMI 2.0 test solution overview from Keysight
Source Test
N5399C HDMI Electrical
Compliance Test Software
Cable Assembly
Test
Sink Test
(ParBERT)
Sink Test (AWG)
N5990A Automatic SW
for HDMI compliance
N5990A Automatic SW
for HDMI compliance
Protocol Test
U4998A SW for
HDMI compliance
SW
HW
E5071C Option TDR
ENA Network Analyzer
DSO90000A
Infiniium
real time
scope
13 GHz
U4998A (N5998A)
HDMI 1.4
protocol analyzer/
generator
E4887A
ParBERT
TMDS Signal
Generator
M8190A AWG
new
Cable Emulator
Signal
Conditioning
Fixture
N1080B
N1080B
N1080B
HDMI 2.0 TPA
DUT
Tx
Rx
Rx
Source
Cable
Sink
Protocol Test on
U4998A is
supported up to
HDMI 1.4b
For HDMI 2.0 third
party protocol
testers are
supported in
Valiframe SW
Tx
Source
Sink
HDMI 2.0 webcast
Page 16
Rx
Physical Layer Cable Assembly Testing
Points to Know:
 HDMI2.0 doesn’t require new cable testing; still follows HDMI1.4b spec
 Standard Cable measurements for characterization and compliance testing:
skew, impedance, attenuation, and crosstalk.
 “Stressed” Eye Diagram Analysis of Interconnects: allowing direct
measurement of eye characteristics at the end of the link.
Time Domain
Intra-Pair
Skew
(T31, T42)
Inter-Pair
Skew
(Tdd21)
Frequency Domain
Impedance
(Tdd22)
Complete characterization of interconnects
(Time domain, frequency domain, and Eye diagram)
Attenuation
(Sdd21)
Phase
(Sdd21)
Impedance
(Tdd11)
Eye Diagram Analysis
• Jitter insertion
• Emphasis
• Equalization
FEXT
(Sdd21)
HDMI 2.0 webcast
Page 17
Physical Layer Source/Sink Impedance Testing
Points to Know:
New
 Impedance measurements of Source and Sink required in HDMI2.0
 Source impedance measurements during transmission of actual data pattern (Hot
TDR measurements) is required
 DC voltage bias can be applied through internal bias-tees
 Hot TDR with ENA-TDR, fast, accurate and no worry about ESD
DC Power
Supply
HDMI data pattern
Tx
Measurement signal
t
t
t
HDMI 2.0 webcast
Page 18
Hot TDR Issue: Bad effect of Tx output signal
HDMI Signal
Tx
Sweep signal by VNA
t
t
t
TDR impedance test result varies
due to output signal from Tx
Tx output signal is also
input to the VNA’s receiver
and affects test result.
Tx output spurious
IF BW = 70kHz
freq
HDMI 2.0 webcast
Page 19
Hot TDR Issue: Bad effect of Tx output signal
HDMI Signal
Tx
Sweep signal by VNA
t
t
t
Tx output effect can be
minimized by narrowing
IF BW (receiver filter
bandwidth)
IF BW = 1kHz
freq
HDMI 2.0 webcast
Page 20
HDMI 2.0 test solution overview from Keysight
Source Test
N5399C HDMI Electrical
Compliance Test Software
Cable Assembly
Test
Sink Test
(ParBERT)
Sink Test (AWG)
N5990A Automatic SW
for HDMI compliance
N5990A Automatic SW
for HDMI compliance
Protocol Test
U4998A SW for
HDMI compliance
SW
HW
E5071C Option TDR
ENA Network Analyzer
DSO90000A
Infiniium
real time
scope
13 GHz
Fixture
E4887A
ParBERT
TMDS Signal
Generator
new
Cable Emulator
Signal
Conditioning
U4998A (N5998A)
HDMI 1.4
protocol analyzer/
generator
M8190A/M8195A
AWG
HDMI 2.0 TPA
N1080B
HDMI 2.0 TPA
N1080B
DUT
Tx
Rx
Rx
Source
Cable
Sink
Protocol Test on
U4998A is
supported up to
HDMI 1.4b
For HDMI 2.0 third
party protocol
testers are
supported in
Valiframe SW
Tx
Source
Sink
HDMI 2.0 webcast
Page 21
Rx
HDMI 2.0 Sink Test Setup
ParBERT *and* AWG are supported
Same N5990A Test automation
controls both setups
AWG M8190A/M8195A
ParBERT
E4887A
+
Bias-Ts
Much lower cost
Fewer accessories
Less re-configuration
+
+
+
TTCs
+
Bias-Ts
+
Delay lines
HW CE
+
Plus real-time oscilloscope for calibration (in both cases)
HDMI 2.0 webcast
Page 22
Different Approaches for Digital Data Generation
BERT
Digital
Data
Add
jitter
AWG
Waveform
Samples
DAC
AWG
 Uses a limiting amplifier which
generate ones and zeros
 Uses one clock cycle per bit
 Uses a DAC and a linear amplifier to
generate arbitrary signal levels
 Uses oversampling
(+) very fast and accurate digital signals
(+) amount of jitter can be adjusted
on the fly
(–) difficult to realize adjustable transition
times, emulate ISI, requires external HW
CE
(–) higher cost
(–) higher system complexity
(–) less flexibility
(–) slower bit rate at given sample rate
(–) jitter changes require re-calculation of the
waveform
(+) much more flexible in generating adjustable
transition times and emulate ISI
(+) less expensive
(+) simpler setup
HDMI 2.0 webcast
Page 23
M8190A Arbitrary Waveform Generator
Key features
 Sample rate up to 12 GSa/s @ 12 bit resolution
 Deep sample memory, 2G Samples per channel
 Supports data rates up to 6 Gb/s
 Flexible generation of distortions without cable emulators and TTCs
 Approved in Keysight MOI for HDMI 2.0 sink testing
HDMI 2.0 webcast
Page 24
M8190A data signal at 6 Gb/s
6 Gb/s nominal eye
6 Gb/s with ISI and jitter
Transition times, ISI and jitter can be
arbitrarily added to the waveform –
without changing the hardware setup
Jitter tolerance test waveform
(Jitter + ISI + skew +EQ)
HDMI 2.0 webcast
Page 25
HDMI sink test setup using the M8190A
– 5-slot AXIe chassis with embedded controller and two M8190A
modules (= 4 differential channels)
8x Bias-T
TPA-P
fixture
for calibration:
Sink Device
under Test
TPA-R
fixture
Digital
Oscilloscope
 No hardware cable emulators, no TTCs
 Fewer manual re-connections  better reliability
 Smaller and more affordable setup compared to ParBERT
 Swing voltage, ISI, etc can be changed “On-the-Fly”
 Jitter tolerance test can be done, too!
HDMI 2.0 webcast
Page 26
HDMI Sink Test setup (AWG)
AWG directly connected to TV with N1080B-H04
plug test fixture. 5 V HPD provided by lab power
supply.
HDMI 2.0 webcast
Page 27
HDMI 2.0 TMDS electrical sink compliance tests
– 3 Test IDs defined by the Generic CTS
• HF2-1 Min/Max Differential Swing Tolerance
• HF2-2 Intra-Pair Skew Tolerance
• HF2-3 Jitter Tolerance
– Each test ID consists of an initial calibration utilizing an
oscilloscope followed by the actual test with the DUT
– N5990A test automation guides the user through the test
procedure with detailed instructions about required system
connectivity
– Test results are logged to a comprehensive test report
HDMI 2.0 webcast
Page 28
HDMI 2.0 defines additional SCDC control interface
required for data rates above 3.4 Gbps per lane
TPA-P
fixture
8x Bias-T
USB
TMDS Generator
•
•
•
•
Status & Control
Data Channel (SCDC)
Controller
•
Sink Device
under Test
To reduce EMI the HDMI 2.0 specification
requires a scrambling scheme for the
TMDS data signals above 3.4 Gbps
Clock ratio is changed to accomodate
higher data rates
These features are controlled via the
SCDC control interface
N5990A test automation SW automatically
controls the features to match the
currently tested data rate
If the DUT implements the optional bit
error counters these values can be read
via the SCDC interface
HDMI 2.0 webcast
Page 29
N5990A Test Automation Software – HDMI 2.0 Rx Test
Compliance Tests and Product Characterization
AWG: Opt. 151
E4887A: Opt. 150
HDMI 2.0 webcast
Page 30
HDMI 2.0 N5990A “ValiFrame” Rx Tests
Test Automation Software – Connection Diagram
Examples
Calibration (with oscilloscope)
HDMI 2.0 webcast
Page 31
HDMI 2.0 Frame Generator - Debug Utility
BitifEye HDMI Frame Generator
allows you to control various
parameters of the video signal
video mode, swing, jitter, skew,
pattern to go beyond compliance
testing with ‘on-the-fly’ waveform
generation.
HDMI 2.0 webcast
Page 32
What lies beyond 2.0 ...
Faster, faster, faster
– Market Requirements for next Revision are currently collected
– New ultra high resolution video formats are already on the horizon
– Requirements for even higher data rates up to 12Gbps per lane are
discussed
What does this mean for the test equipment?
We need to get faster as well !
HDMI 2.0 webcast
Page 33
Go Where you Have Never Been Able to Test Before
In Speed, in Bandwidth and in Channel Density
– Sample rate 54 GSa/s to 65 GSa/s per channel
– Up to 16 GSa of waveform memory per module (*)
– 8 bits of vertical resolution
– > 20 GHz bandwidth
– Amplitude up to 2 Vpp(diff.) or 1 Vpp(se),
voltage window -1.0 … +3.3V
– > 32 GBaud symbol rate
– 1, 2 or 4 differential channels per 1-slot AXIe
module
– Ultra low intrinsic jitter
(RJrms < 200 fs @ 32 Gb/s PRBS 211-1)
– 16-tap FIR filter in hardware for frequency
response compensation (*)
– Multi-module synchronization up to 16 channels
per 5-slot AXIe chassis
New M8195A 65 GSa/s AWG
Explore your possibilities
HDMI 2.0 webcast
Page 34
(*) Rev 2
M8195A Superior Signal Quality
Intrinsic Jitter measured with a 32 Gb/s PRBS signal
HDMI 2.0 webcast
Page 35
M8195 eye diagrams
12Gbps signal with ISI and Jitter
12Gbps clean signal
HDMI 2.0 webcast
Page 36
Summary
Keysight offers a future proof solution for HDMI sink testing
– Keysight offers an attractive solution for HDMI 2.0 based on the
M8190A AWG for immediate test needs
– As the specification evolves in the future, Keysight offers an easy
upgrade path to the new M8195A AWG to be able to test future
versions of the HDMI standard
– As the new M8195 AWG is based on the same Modular AXIe
formfactor the M8190A AWG modules can easily be replaced
– M8195A will also be supported by the N5990A test automation
software
HDMI 2.0 webcast
Page 37
Questions?
HDMI 2.0 webcast
Page 38
Backup
HDMI 2.0 webcast
Page 39
HDMI Contribution from BitifEye
-
N5990A Test automation software (“ValiFrame”)
-
Frame Generator software
-
Accessories
-
E.g. Bias Tee, variable delay lines,TPA,
SCDC controller
-
2100 Series Switching solutions for automated testing
-
Cable test with ENA-TDR
-
Source test with DSO/DSA
-
Sink test with ParBERT or AWG
HDMI 2.0 webcast
Page 40
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