Teledyne LeCroy QPHY-PCIE3 - Manual (Page 19)

QPHY-PCIE3 Operator’s Manual
T EST 1.4 – C OMPLIANCE E YE 8 GT/ S
CEM Compliance Eye 8 GT/s. This test forms an eye diagram using 1,008,000 UI from the PCI
Express Gen 3 compliance pattern (base spec, ver 0.9 rev 3.0). Masks for System Board TX
and Add-In Card TX, as defined in the 0.7 revision of the PCI Express Gen3 CEM spec, are
available. QualiPHY uses Eye Doctor II to apply the behavioral Rx equalizer, and then uses
SDA II to create the eye diagrams.
T EST 1.5 – 8 GT/ S T X J ITTER P ARAMETERS
PCIe3 8 GT/s Tx Jitter Parameters. This test measures all transmitter jitter parameters
introduced in the PCI Express Gen 3 base spec for 8 GT/s. They include Ttx-ddj (4.3.3.10.5),
Ttx-utj (4.3.3.10.6), Ttx-udjdd (4.3.3.10.6), Ttx-upw-tj (4.3.3.10.7), and Ttx-upw-djdd (4.3.3.10.7).
Test 1.7 – Common Transmitter Parameters
T EST 1.7.1 – UI
Unit Interval. This test measures the unit interval from the bitrate. SSC should be disabled for
this test.
T EST 1.7.2 – V TX - CM - AC - PP AND V TX - DC - CM
Transmitter common mode AC peak-to-peak voltage and DC common mode voltage. This test
measures the common mode AC peak-to-peak voltage where common mode is half the sum of
a differential voltage signal. DC common mode measures the DC sit of a differential signal.
Measurement must be made over at least 1e6 UI. See section 4.3.3.2 in PCI Express Gen3
base spec ver 0.9 rev 3.0.
T EST 1.7.3 – L TX - SKEW
Lane-to-Lane Skew. This test measures the skew between lanes belonging to a single link.
QPHY-PCIE3 Variables
B REAKOUT C HANNEL S-P ARAMETER F ILE
This variable allows the user to specify the four port s-parameter file name (.s4p) to be used for
de-embedding the breakout channel when necessary. The file should be located on the
oscilloscope in D:\Applications\EyeDr\PCIe3 (Note: This is the default path).
D E - EMBED F IXTURE B REAKOUT C HANNEL
This variable allows the user to select whether or not you would like to de-embed the fixture's
breakout channel. This is required for some tests. If you have the s-parameter files for the
breakout channel, select "Yes". Otherwise, the fixture will be set to ideal.
D EMO M ODE
This variable allows the user to run the tests in demo mode. When this value is to Yes, the tests
can be run in demonstration mode using saved waveforms. The waveforms must be located in
the Saved Waveform Path. During demo mode, the user is still prompted with connection
diagrams based on their other variable selections. This allows the user to experience running
the test as it would be run on live signals. The default value for this variable is No.
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