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Agilent Technologies Quick Start Guide
last update 2012/06/18(YS)
•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
ENA Option TDR Quick Start
Starting the Application
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ENA Option TDR Quick Start
Exiting the Application
•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
•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
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ENA Option TDR Quick Start
Modes of Operation
TDR/TDT Mode Eye/Mask Mode
•1/2/4 port TDR/TDT and S-parameters
(SE and BAL) •Simulated Eye Diagram and Eye Mask
Function
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ENA Option TDR Quick Start
Modes of Operation
Setup Pane
TDR/TDT Pane
Eye/Mask Pane
•Switching between modes is done by pressing the tabs on the left hand side. The
following 3 panes are available.
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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
10-90% or 20-80% is
available
Confirm port number
before connection.
Automatic display
allocation depending
on selected topology
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ENA Option TDR Quick Start
Setup Wizard: Deskew and Loss Compensation
After measurement of
Load for all ports,
press ”Apply” button to
calculate and apply error
coefficients.
NOTE: “DUT Topology”, “DUT Length”, “Rise Time” procedure Is the same as
previous section.
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ENA Option TDR Quick Start
Setup Wizard: Full Calibration (ECal)
When fixtures are required to
connect to the DUT, press
“Fixture Comp” to
compensate for the delay of
the fixture.
NOTE: “DUT Topology”, “DUT Length”, “Rise Time” procedure Is the same as
previous section.
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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. Differential 1-port
Differential 2-port
Single-ended 1-port
Single-ended 2-port
Single-ended 4-port
T11 S11
T11
T22 S11
S22
T21
T12 S21
S12
T11
T22
T33
T44
S11
S22
S33
S44
T31
T13
T42
T24
S31
S13
S42
S24
Tdd11 Sdd11
Tdd11
Tdd22 Sdd11
Sdd22
Tdd21
Tdd12 Sdd21
Sdd12
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ENA Option TDR Quick Start
TDR/TDT Mode
Set horizontal and vertical scale
and position.
Set measurement
parameter and
format.
Set gating
parameters.
Set trace parameters.
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Click on software knobs
to enable mouse wheel.
Reference plane
indicated by red line.
By specifying area
with the mouse, it is
possible to zoom in
on specific sections
of the response.
increase /
decrease
scale
(1-2-5 step) left right down up
Reference position
(left edge or center)
ENA Option TDR Quick Start
TDR/TDT Mode: Setting the Scale
increase /
decrease
scale
(1-2-5 step)
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Measure
Format
Stimulus
Rise Time Manually change rise time to
characterize expected
performance at slower edge speeds.
Time Domain & Differential
Time Domain & Single-Ended S-Parameter & Single-Ended
S-Parameter & Differential
Measure both forward and reverse
parameters for all possible modes of
operation (single-ended, differential,
mode conversion) with a single setup.
ENA Option TDR Quick Start
TDR/TDT Mode: Setting Parameters
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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 range
(notch)
Gate ON
Gate OFF Gate OFF
Gate ON
ENA Option TDR Quick Start
TDR/TDT Mode: Gating
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①Set Display allocation
②Set coupling between traces
③Copy trace setting
① ② ③
Tdd11 &
Tdd22 Sdd11 &
Sdd22
Tdd21 &
Tdd12 Sdd21 &
Sdd12
Mixed
Tdd11
Tdd21
Tcd11
Tcd21
Tdd12
Tdd22
Tcd12
Tcd22
Tdc11
Tdc21
Tcc11
Tcc21
Tdc12
Tdc22
Tcc12
Tcc22
All T
Sdd11
Sdd21
Scd11
Scd21
Sdd12
Sdd22
Scd12
Scd22
Sdc11
Sdc21
Scc11
Scc21
Sdc12
Sdc22
Scc12
Scc22
All S
•Differential 2-port topology:
ENA Option TDR Quick Start
TDR/TDT Mode: Trace Control
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Select transmission
(TDT) parameter
Click “Draw Eye” to
calculate Simulated Eye
Diagram
ENA Option TDR Quick Start
Eye/Mask Mode
① ② ③
①Set bit pattern type and length
② Set one level, zero level, data rate and rise time
③ Eye Results
Enable/Disable
mask testing.
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ENA Option TDR Quick Start
Eye/Mask Mode
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ENA Option TDR Quick Start
Tool Bar
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
① ② ③ ④ ⑤ ⑥ ⑧ ⑦ 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
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