Teledyne LeCroy PETracer EML Analyzer and Exerciser User Manual - Manual (Page 44)

Chapter 3: Installation PETracer EML User Manual
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LeCroy Corporation
Device Emulator - Description
The LeCroy Device Emulator is an adapter that provides a way of connecting a
PETrainer EML Exerciser to a PCI Express motherboard. The emulator has two
connectors: a connector for a data cable and an edge connector for inserting the
Device Emulator into a slotted DUT.
Installing the Device Emulator
To install the Device Emulator into the DUT, perform the following steps:
Step 1 If not already powered off, power off the PETrainer/UPAS 100K system
and the DUT. The PETrainer power switch is located on the back of the
UPAS.
Step 2 Check the Jumper settings. The default is to have all jumpers installed
on the device emulator. The jumpers can be used to modify the following:
• JP1 (Host RX Voltage Level): This jumper can be removed to reduce the
differential voltage level that the DUT receives from the PETrainer to (0.45V -
0.65V). When installed (default) the differential voltage level is (.9V - 1.2V).
• JP2 (Refclk): This jumper can be removed for systems that do not provide a
100MHz RefClk to the PCI Express slot. When installed (default), the
PETrainer uses the RefClk that is provided by the DUT.
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Note: This jumper MUST be installed if the DUT is providing a
Spread Spectrum enabled RefClk.
• JP3-JP6 (PRSNT2#): These jumpers can be used to open circuit the
Presence detect signals driven to the PCI Express connector. When removed,
the PRSNT2# signal is floating. When installed (default), the PRSNT2# signal
is tied to GND. There are four PRSNT2# signals on the PCI Express
connector, one for each lane width (x1, x4, x8, and x16).
Step 3 Insert the edge connector on the Device Emulator into a PCI Express
slot in the DUT. The Device Emulator is designed to fit into standard x16
PCI Express slot. To connect to a x1, x4, or x8 slot, you must install a slot
reducer, available from LeCroy.
Step 4 The Device Emulator is shipped from LeCroy with a metal face plate for
attachment to a PC case. If you are working with a motherboard that is
not in a PC case, you may prefer to remove the metal face plate so the
emulator can sit flat with the motherboard. To remove the face plate,
unscrew the two screws that hold it onto the emulator.