ENA Option TDR Quick Start
Agilent Technologies Quick Start Guide
last update 2012/06/18(YS)
ENA Option TDR Quick Start
Online Help
Details on ENA Option TDR operation can be found in the Online Help document.
•On the Web: http://ena.tm.agilent.com/e5071c/manuals/webhelp/eng/
•On the Instrument
2
ENA Option TDR Quick Start
Starting the Application
•To start the ENA Option TDR application, press “[Analysis] – TDR”.
After pressing the TDR softkey to turn the application ON, the
firmware will restart to enter the TDR mode.
Note:
•Firmware restart is requires since the ENA Option TDR uses
a different data process than the ENA
3
ENA Option TDR Quick Start
Exiting the Application
•To exit the ENA Option TDR application, press “[Analysis] – TDR”.
After pressing the TDR softkey to turn the application OFF, the
firmware will restart to exit the TDR mode.
Note:
•Firmware restart is requires since the ENA Option TDR uses a
different data process than the ENA
•Clicking on the [X] button closes the TDR application GUI, but
the TDR application (MODE) is not closed
•To close the TDR application (MODE), press Analysis > TDR
•To restart the TDR application GUI, click on Analysis > Start
TDR key
4
ENA Option TDR Quick Start
Modes of Operation
TDR/TDT Mode
•1/2/4 port TDR/TDT and S-parameters
(SE and BAL)
Eye/Mask Mode
•Simulated Eye Diagram and Eye Mask
Function
5
ENA Option TDR Quick Start
Modes of Operation
•Switching between modes is done by pressing the tabs on the left hand side. The
following 3 panes are available.
Setup Pane
TDR/TDT Pane
Eye/Mask Pane
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ENA Option TDR Quick Start
Basic and Advanced Mode
•The majority of TDR/TDT measurements can be preformed in the Basic Mode
(default). By selecting Advanced Mode, features such as de-embedding and limit
testing are available.
Basic Mode
Advanced Mode
TDR/TDT
Yes
Yes
S-parameters
Yes
Yes
Eye Diagram
Yes
Yes
Setup Wizard
Yes
No
Softkeys
No
Yes
Hardkeys
Locked
Exceptions: Trace Prev/Next.
Trace Max
Available
Channels
1
Ch1 used by TDR app.
2
Ch1 used by TDR app. Use
Ch2 for custom freq domain
meas.
Calibration
•Deskew
•Deskew & Loss
Compensation
•ECal
All ENA Cal methods are
available (mech cal, TRL,
etc…) [*1]
Customization of freq
domain settings (Fstart,
Fstop, nop, etc…)
No
The optimum frequency
domain settings are
determined by the DYT length
measurement.
Yes
Available in Ch2.
Do NOT change Ch1
parameters using the ENA U/I,
because the information is not
reflected in the TDR app.
[*1] Enable “Used Advanced Calibration Methods checkbox, when using ENA Cal methods.
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ENA Option TDR Quick Start
Setup Pane
•Setup Wizard (recommended) is available for step-by-step measurement setup,
but manual setup is possible through the setup tab as well. Further customization of
measurement setup is possible by accessing the Advanced Mode.
The following 3 error correction methods are available:
•Deskew
•Deskew and loss compensation
•Full calibration (ECal)
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ENA Option TDR Quick Start
Setup Wizard: Deskew
Automatic display
allocation depending
on selected topology
Confirm port number
before connection.
10-90% or 20-80% is
available
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ENA Option TDR Quick Start
Setup Wizard: Deskew and Loss Compensation
NOTE: “DUT Topology”, “DUT Length”, “Rise Time” procedure Is the same as
previous section.
After measurement of
Load for all ports,
press ”Apply” button to
calculate and apply error
coefficients.
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ENA Option TDR Quick Start
Setup Wizard: Full Calibration (ECal)
NOTE: “DUT Topology”, “DUT Length”, “Rise Time” procedure Is the same as
previous section.
When fixtures are required to
connect to the DUT, press
“Fixture Comp” to
compensate for the delay of
the fixture.
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ENA Option TDR Quick Start
Default Display Allocation
•After selecting the DUT topology, the most commonly measured parameters for
that topology are automatically allocated.
Single-ended 1-port
T11
S11
Single-ended 2-port
Single-ended 4-port
T11
T22
T33
T44
S11
S22
S33
S44
T31
T13
T42
T24
S31
S13
S42
S24
Differential 1-port
Tdd11
Sdd11
Differential 2-port
T11
T22
S11
S22
Tdd11
Tdd22
Sdd11
Sdd22
T21
T12
S21
S12
Tdd21
Tdd12
Sdd21
Sdd12
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ENA Option TDR Quick Start
TDR/TDT Mode
Set measurement
parameter and
format.
Set horizontal and vertical scale
and position.
Set gating
parameters.
Set trace parameters.
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ENA Option TDR Quick Start
TDR/TDT Mode: Setting the Scale
increase /
decrease
scale
(1-2-5 step)
left
right
increase /
decrease
scale
(1-2-5 step)
down
up
By specifying area
with the mouse, it is
possible to zoom in
on specific sections
of the response.
Reference position
(left edge or center)
Reference plane
indicated by red line.
Click on software knobs
to enable mouse wheel.
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ENA Option TDR Quick Start
TDR/TDT Mode: Setting Parameters
Measure both forward and reverse
parameters for all possible modes of
operation (single-ended, differential,
mode conversion) with a single setup.
Time Domain & Differential
S-Parameter & Differential
Time Domain & Single-Ended
S-Parameter & Single-Ended
Measure
Format
Stimulus
Rise Time
Manually change rise time to
characterize expected
performance at slower edge speeds.
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ENA Option TDR Quick Start
TDR/TDT Mode: Gating
It is possible to mathematically remove the effects of a particular section of the
reflected response by specifying the gate range.
The gating results are
observed in the frequency
domain by coupling the traces.
The example on the left
couples the gate settings
between Trace1 and Trace2.
Observe the effects of applying gate on Trace1 in the time domain and observe the results on
Trace2 in the frequency domain.
Gate OFF
Gate OFF
Gate ON
Gate range
(notch)
Gate ON
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ENA Option TDR Quick Start
TDR/TDT Mode: Trace Control
①
②
③
①Set Display allocation
•Differential 2-port topology:
Tdd11 &
Tdd22
Sdd11 &
Sdd22
Tdd11
Tdd12
Tdc11
Tdc12
Sdd11
Sdd12
Sdc11
Sdc12
Tdd21
Tdd22
Tdc21
Tdc22
Sdd21
Sdd22
Sdc21
Sdc22
Tdd21 &
Tdd12
Sdd21 &
Sdd12
Tcd11
Tcd12
Tcc11
Tcc12
Scd11
Scd12
Scc11
Scc12
Tcd21
Tcd22
Tcc21
Tcc22
Scd21
Scd22
Scc21
Scc22
Mixed
All T
All S
②Set coupling between traces
③Copy trace setting
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ENA Option TDR Quick Start
Eye/Mask Mode
Select transmission
(TDT) parameter
Click “Draw Eye” to
calculate Simulated Eye
Diagram
①
Enable/Disable
mask testing.
②
③
①Set bit pattern type and length
② Set one level, zero level, data rate and rise time
③ Eye Results
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ENA Option TDR Quick Start
Eye/Mask Mode
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ENA Option TDR Quick Start
Tool Bar
①
②
③
④
⑤
① About ENA Option TDR
② Select active trace
③ Autoscale
④ Start sweep (continuous trigger)
⑤ Single sweep
⑥ Data, Memory trace display settings
⑥
⑦
⑧
⑨
⑩ ⑪
⑫
⑦ Activate markers
⑧ Perform marker search (rise time, dTime)
⑨ Save state file, trace data, screen image
⑩ Minimize the setting area
⑪ Open HELP file
⑫ Exit ENA Option TDR GUI (*1)
(*1) Only closes the TDR GUI. To exit the application, click [Analysis] > TDR.
The TDR Option uses a different data process from the VNA-mode. When not using the TDR Option, be sure to exit the TDR application for proper operation.
For further details, refer to HELP file (>Product Information > General Principles > Data Processing).
http://ena.tm.agilent.com/e5071c/manuals/webhelp/eng/product_information/general_principles_of_operation/data_processing.htm
20
Agilent Technologies Rev A.01.50
Enhancements to Meet
Requirements of Latest High
Speed Digital Standards
New Features Available in Revision A.01.50
Advanced Waveform Analysis
Determine optimal emphasis
and equalization settings for
your link
Emphasis and equalization are
commonly used signal conditioning
techniques when transmitting signals
at gigabit data rates.
The term emphasis is used to
describe signal conditioning on the
transmitter, while the term
equalization is used on the receiver
side.
Simulate real-world signals through jitter insertion
Stressed Eye Diagram Analysis of Interconnects can be
realized with jitter insertion. Impairments such as random and
periodic (sinusoidal) jitter can be configured.
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New Features Available in Revision A.01.50
Avoid Spurious
Impedance analysis of active devices
under actual operating conditions
For Hot TDR measurements of transmitters, the
data signal from the transmitter cause
measurement error.
The Avoid Spurious feature determines the
spurious frequencies from the data rate (user
input) and sets the optimum frequency sweep to
minimize measurement error.
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Advanced Waveform Analysis
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Advanced Waveform Analysis
Jitter Insertion
①
③
②
① Click to enable jitter insertion
② Select jitter type… random, or periodic (sinusoidal)
③Define jitter magnituide and frequency (units can be either “Unit Interval”, or
“Second”)
25
Advanced Waveform Analysis
Emphasis
①
②
① Click to enable Emphasis
② Define cursors for emphasis (units in dB)
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Advanced Waveform Analysis
Equalization
③
①
④
②
① Click to enable Equalization
② Select Equalizer definition method
③ Define CTLE coefficients
④ Load CSV file
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Advanced Waveform Analysis
Example
Input Signal with…
•Periodic jitter = 500kHz, 0.1UI
•Emphasis: Post 1 Cursor = -3.5dB
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Advanced Waveform Analysis
Example
Equalization OFF
Equalization ON
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Questions?
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