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E5071C-TDR_USB2_CableTest_MOI_rev1.0 Keysight Method of Implementation (MOI) for USB2.0 Cable-Connector Assembly Compliance Test c20140925 [31]

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

Revision 1.0
Sep-24, 2014

Universal Serial Bus Specification Revision 2.0
Keysight Method of Implementation (MOI) for USB 2.0
Connectors and Cables Assemblies Compliance Tests
Using Keysight E5071C ENA Option TDR

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

Table of Contents
1. Revision History ............................................................................................................. 3
2. Purpose ........................................................................................................................... 3
3. References ...................................................................................................................... 3
4. Required Equipment ....................................................................................................... 3
5. Test Procedure ................................................................................................................ 4
5.1. Outline of Test Procedure ......................................................................................... 4
5.2. Setup ......................................................................................................................... 6
5.2.1. Recalling a State File ......................................................................................... 6
5.2.2. Saving a State File ............................................................................................. 7
5.3. Calibration ................................................................................................................ 8
5.3.1. Time Domain Calibration .................................................................................. 8
5.3.2. Frequency Domain Calibration ....................................................................... 13
5.3.3. Adjustment of Effective Rise Time ................................................................. 15
5.4. Measurement .......................................................................................................... 18
5.4.1. Cable Impedance (High/Full-Speed) ............................................................... 18
5.4.2. Propagation Delay ........................................................................................... 18
5.4.3. Propagation Delay Skew ................................................................................. 19
5.4.4. Signal Pair Attenuation (High/Full-Speed) ..................................................... 20
6. [Appendix] Manual Setup ............................................................................................ 21
6.1. Channel & Trace Setup ........................................................................................... 21
6.2. Cable Impedance (High/Full-Speed) ...................................................................... 22
6.3. Propagation Delay .................................................................................................. 24
6.4. Propagation Delay Skew ........................................................................................ 25
6.4.1. Parameter Setup ............................................................................................... 25
6.4.2. Crosstalk Compensation .................................................................................. 26
6.5. Common Parameters Setup for Frequency-domain Measurements ....................... 27
6.6. Signal Pair Attenuation (High/Full-Speed) ............................................................ 28
6.7. Defining Limit Line Tables .................................................................................... 28
7. [Appendix] Defining SOLT Calibration Kit ................................................................. 29

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

1. Revision History

Revision Comments Issue Date
1.00 Initial Revision. Sep. 24, 2014

2. Purpose
This test procedure was written to explain how to use the Keysight ENA Option TDR to
make the connectors and cable assemblies measurements required per USB
Specification Revision 2.0 and Cables and Connectors Class Document Revision 2.0.

3. References
Universal Serial Bus Specification Revision 2.0 (April 27, 2000)
Universal Serial Bus Cables and Connectors Class Document Revision 2.0 (August
2007)

4. Required Equipment
Description Test Equipment QTY
Network Analyzer Keysight E5071C ENA Series Network Analyzer 1 ea.
Option 440/445/460/465/480/485/4DK/4K5 (one of
port/freq. options)
Option TDR (Enhanced time domain analysis)
4-port ECal or Keysight N4431B or 85033E (E5071C-44x/46x/48x) 1 ea.
Mechanical Cal Keysight N4433A or 85052D (E5071C-4D5/4K5)
Kit
Test Fixture USB 3.0 official test fixture 1 ea.
Adapter 1250-1744 3.5 mm(f)-Type N(m) adapter 4 ea.
(E5071C-44x/46x/48x) or 83059B coaxial adapter
(E5071C-4DK/4K5) for E5071C ports
RF cable 3.5 mm or SMA cables of 4 GHz bandwidth or more 4 ea.
50 ohm Terminator Termination for unused differential pairs (ex. Keysight 12 ea.
909D-301)
Note: Signal pair attenuation test requires the test frequency from 64 kHz. When using
E5071C-4x5, the lower frequency is limited to either 100 kHz or 300 kHz depending on the
frequency option.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

5. Test Procedure

5.1.Outline of Test Procedure
1. Setup
Instrument, RF cables and test fixture setup
Automatic setup by recalling a state file or manual setup

2. Calibration
ECal Calibration & Fixture Compensation or Deskew & Loss Compensation
SOLT Calibration
Adjustment of Effective Rise Time
3. Measurements
4-1. Time-domain Measurements
- Cable Impedance (High/Full-Speed)
- Propagation Delay
- Propagation Delay Skew
4-2. Frequency-domain Measurements
- Signal Pair Attenuation (High/Full-Speed)

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

Note: Hard keys (Keys on the E5071C's front panel) are displayed in Blue color and Bold.
(Example: Avg, Analysis)
Note: Soft keys (Keys on the E5071C's screen) are displayed in Bold.
(Example: S11, Real, Transform)
Note: Buttons of the TDR software are displayed in Green color and Bold.
(Example: Trace, Rise Time)
Note: Tabs of the TDR software are displayed in Brown color and Bold.
(Example: Setup, Trace Control)

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

5.2.Setup

5.2.1. Recalling a State File
This section describes how to recall a state file of the E5071C that includes all the
measurement settings for USB2.0 connectors and cable assemblies compliance tests.
The state file can be downloaded at: http://www.keysight.com/find/ena-tdr_compliance
Copy the state file into the E5071C's directory via USB mass storage device and recall
the state file using the TDR software. Necessary parameters for testing are
automatically set up in the E5071C. Refer to Appendix for the details about manual
setup.
If TDR setup wizard is shown, click Close button in the TDR setup wizard main
window.

1. Open Setup tab.
2. Click Advanced Mode to show the dialog box.

3. A dialog box appears requesting for confirmation. Then click Yes. (Uncheck "Use
Advanced Calibration Methods")

4. Click File and select Recall State.
5. Specify a folder and a file name, and click Open.

The E5071C's channel 1 is used for time-domain measurements by using the TDR
software displayed at the bottom of the E5071C's screen. The channel 2 is used for
frequency-domain measurements by using the hard keys on the front panel and the soft
keys on the right side of the screen.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

5.2.2. Saving a State File
All the measurement settings including calibration information can be saved in a state
file (*.tdr). After performing calibration, all necessary calibration coefficients are saved
in a state file and can be recalled for the next measurements.

1. Press Save/Recall > Save Type and select State & Cal as a state file type.
2. Click File of the TDR software and select Save State.

3. Enter file name and save the state file with calibration information.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

5.3.Calibration
The purpose of this step is to calibrate the RF effects such as delay, loss or mismatch of
RF cables and test fixture traces before measurements. In order to remove the fixture
trace effect, two calibration methods (ECal calibration & fixture compensation or
deskew & loss compensation) are available for time domain and SOLT calibration is
available for frequency domain with the E5071C firmware for the USB 2.0 connectors
and cable assemblies compliance tests.

5.3.1. Time Domain Calibration

5.3.1.1. ECal Calibration & Fixture Compensation
Full calibration is performed by using the ECal Module (i.e. N4431B/N4433A) at the
end of RF cables connected to the E5071C's test ports. The effect of the fixture is
removed by fixture compensation.

ECal calibration & fixture compensation for time-domain measurements are performed
by the TDR software.

1. ECal Calibration & Fixture Compensation
a) Press Channel Next to select Channel 1.
b) Click Setup tab.
c) Click ECal to launch the TDR Setup Wizard.

d) Connect the E5071C ports (port 1 to 4) to the ECal module with RF cables.
e) Click Calibrate to perform ECal Calibration.
f) Click Next >.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

g) Click Options.

h) Select Standard Type to "Short".
i) Connect Short standard of USB 3.0 official test fixture to the E5071C port 1
with the RF cable.
j) Click Port 1.
k) Connect Short standard of USB 3.0 official test fixture to the E5071C port 2
with the RF cable.
l) Click Port 2.
m) Connect Short standard of USB 3.0 official test fixture to the E5071C port 3
with the RF cable.
n) Click Port 3.
o) Connect Short standard of USB 3.0 official test fixture to the E5071C port 4
with the RF cable.
p) Click Port 4.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

q) Click OK.

r) Click Finish.

5.3.1.2. Deskew & Loss Compensation
Deskew and loss compensation for time-domain measurements are performed by the
TDR software.

1. Deskew and Loss Compensation
a) Press Channel Next to select Channel 1.
b) Click Setup tab.
c) Click Deskew&Loss to launch the TDR Setup Wizard.

d) Leave RF cables open and click Deskew.
e) Click Next >.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

f) Connect 3.5 mm(f) to 3.5mm(f) adapter of 85033E or 85052D Mechanical
Calibration Kit between port 1 and port 3 with RF cables.
g) Click Measure.
h) Click Next >.

i) Connect 3.5 mm(f) to 3.5mm(f) adapter of 85033E or 85052D Mechanical
Calibration Kit between port 2 and port 4 with RF cables.
j) Click Measure.
k) Click Next >.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

l) Connect Load standard of 85033E or 85052D Mechanical Calibration Kit to
the E5071C port 1 with the RF cable.
m) Click Port 1.
n) Connect Load standard of 85033E or 85052D Mechanical Calibration Kit to
the E5071C port 2 with the RF cable.
o) Click Port 2.
p) Connect Load standard of 85033E or 85052D Mechanical Calibration Kit to
the E5071C port 3 with the RF cable.
q) Click Port 3.
r) Connect Load standard of 85033E or 85052D Mechanical Calibration Kit to
the E5071C port 4 with the RF cable.
s) Click Port 4.
t) Click Apply.
u) Click Finish.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

v) Press Cal > Port Extensions > Auto Port Extension > Select Ports to
confirm that check-marks are on all the ports (if not, activate it by clicking the
port).
w) Connect Short standard of USB 3.0 official test fixture to the E5071C port 1
with the RF cable.
x) Press Cal > Port Extensions > Auto Port Extension > Measure SHORT >
Port 1
y) Connect Short standard of USB 3.0 official test fixture to the E5071C port 2
with the RF cable.
z) Press Cal > Port Extensions > Auto Port Extension > Measure SHORT >
Port 2
aa) Connect Short standard of USB 3.0 official test fixture to the E5071C port 3
with the RF cable.
bb) Press Cal > Port Extensions > Auto Port Extension > Measure SHORT >
Port 3
cc) Connect Short standard of USB 3.0 official test fixture to the E5071C port 4
with the RF cable.
dd) Press Cal > Port Extensions > Auto Port Extension > Measure SHORT >
Port 4

5.3.2. Frequency Domain Calibration
SOLT calibration is performed to remove the RF effects (i.e. mismatch, loss or delay) of
RF cables and test fixtures. The definition file of the calibration standards is imported to
the E5071C, and SOLT calibration is performed with the E5071C firmware by
measuring the calibration standards. The calibration is applied for frequency-domain
measurements.

5.3.2.1. Selecting Cal Kit
1. Press Channel Next to select Channel 2
2. Press Cal > Cal Kit and select User.
3. Press Cal > Modify Cal Kit > Import Cal Kit and select the cal kit definition file
(*.ckx) and click Open.
4. Confirm that the imported cal kit is set for the selected channel by pressing Cal >
Cal Kit.

5.3.2.2. Performing SOLT Calibration
1. Reflection measurement
a) Connect Open standard of USB 3.0 official test fixture to the E5071C port 1
with the RF cable.
b) Press Cal > Calibrate > 4-port Cal > Reflection > Port1 Open.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

c) Connect Short standard of USB 3.0 official test fixture to the E5071C port 1
with the RF cable.
d) Press Cal > Calibrate > 4-port Cal > Reflection > Port1 Short.
e) Connect Load standard of USB 3.0 official test fixture to the E5071C port 1
with the RF cable.
f) Press Cal > Calibrate > 4-port Cal > Reflection > Port1 Load.
g) Connect Open standard of USB 3.0 official test fixture to the E5071C port 2
with the RF cable.
h) Press Cal > Calibrate > 4-port Cal > Reflection > Port2 Open.
i) Connect Short standard of USB 3.0 official test fixture to the E5071C port 2
with the RF cable.
j) Press Cal > Calibrate > 4-port Cal > Reflection > Port2 Short.
k) Connect Load standard of USB 3.0 official test fixture to the E5071C port 2
with the RF cable.
l) Press Cal > Calibrate > 4-port Cal > Reflection > Port2 Load.
m) Connect Open standard of USB 3.0 official test fixture to the E5071C port 3
with the RF cable.
n) Press Cal > Calibrate > 4-port Cal > Reflection > Port3 Open.
o) Connect Short standard of USB 3.0 official test fixture to the E5071C port 3
with the RF cable.
p) Press Cal > Calibrate > 4-port Cal > Reflection > Port3 Short.
q) Connect Load standard of USB 3.0 official test fixture to the E5071C port 3
with the RF cable.
r) Press Cal > Calibrate > 4-port Cal > Reflection > Port3 Load.
s) Connect Open standard of USB 3.0 official test fixture to the E5071C port 4
with the RF cable.
t) Press Cal > Calibrate > 4-port Cal > Reflection > Port4 Open.
u) Connect Short standard of USB 3.0 official test fixture to the E5071C port 4
with the RF cable.
v) Press Cal > Calibrate > 4-port Cal > Reflection > Port4 Short.
w) Connect Load standard of USB 3.0 official test fixture to the E5071C port 4
with the RF cable.
x) Press Cal > Calibrate > 4-port Cal > Reflection > Port4 Load.

2. Transmission measurement
a) Connect Thru standard of USB 3.0 official test fixture to the E5071C port 1 and
port 2 with the RF cable.
b) Press Cal > Calibrate > 4-port Cal > Transmission > Port 1-2 Thru.
c) Connect Thru standard of USB 3.0 official test fixture to the E5071C port 1 and
port 3 with the RF cable.

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Keysight MOI for USB 2.0 Connectors & Cable Assemblies Compliance Tests

d) Press Cal > Calibrate > 4-port Cal > Transmission > Port 1-3 Thru.
e) Connect Thru standard of USB 3.0 official test fixture to the E5071C port 3 and
port 4 with the RF cable.
f) Press Cal > Calibrate > 4-port Cal > Transmission > Port 3-4 Thru.

3. Press Cal > Calibrate > 4-port Cal > Done to complete calibration. The
calibration coefficients are calculated and the error correction is automatically
turned on.

5.3.3. Adjustment of Effective Rise Time
After performing the calibration, the effective rise time entering the USB 3.0 connector
pins is adjusted for the specification in time-domain measurements (Table 5-1).
1/2 Thru standard is connected to the E5071C port with RF cables. DUT is disconnected
during the adjustment procedure.
Table 5-1 Specification of Effective Rise Time
Trace Test Items Rise Time % Target Rise Time
Tr 1 & 5 Cable Impedance 10

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