Teledyne LeCroy CPCI64 - Manual (Page 3)

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INTRODUCTION
These Active Extender boards allow HOT SWAPPING or LIVE INSERTION of the Unit-Under-Test into
PCI (CompactPCI for CPCI-64) bus. The “HOT SWAPPING” feature of these extenders eliminates the
need for turning the PC Off and On and repeated rebooting. This feature speeds up rework,
characterization and test of Unit-Under-Test in the development phase, as well as production test. The
elimination of the repeated power cycling also helps prolong the system life and the hard disc operation.
These Active Extenders use a new CMOS technology (known as “Quick Switch”) for switching the signals
On and Off. These switches have feature a very low propagation delay, typically about 250 picoseconds,
resulting in no timing degradation between the bus and the Unit-Under-Test. The switches are also bi-
directional allowing the entire address range to be supported for both target and master type operation.
These Active Extender boards isolate all signals and voltages to the Unit-Under-Test, when the On-Off
switch is in the Off position. All voltages are ramped down and ramped up during the power down and
power up in order to eliminate any spikes. During the power down the signals to the bus become isolated
as soon as the main supply, +5V, falls to +3.0V. During the power up the signals stay isolated until the
main voltage is at least +3.0V.
CPCI-64 and PCIAX Rev B and higher extender boards also allow voltage margin testing of the UUT, by
allowing external power supplies to replace the system power supplies as inputs to the Unit-Under-Test.
On-board current-to-voltage converters allow measurement of the current drawn by the UUT at any time,
using a voltmeter attached at the appropriate test points.
INSTALLATION
To install the Active Extender board, make sure to turn the PC power off. Insert the Active Extender in
any available slot and secure its bracket to the main chassis. You are now ready to use your new extender
board.
NOTE: If you are planning to use an external I/O signal to control the board, the On-Off switch
must be in the Off position.