Agilent Technologies FS2101 Manuale Utente

 

The card edge connector of the PCI Active Analysis Probe 
module can accommodate one 32 or 64 bit 5V OR 3V PCI add in 
card.  The extender card connector is either a 3V or 5V 
connector depending on how the board was ordered and 
configured at the factory.  

Simply align the module with the connector and gently push the 
module in until it is seated in the connector.  There is sufficient 
clearance for the add-in card front plate.  The PCI Active 
Analysis Probe/PCI add-in card combination can then be 
installed in any slot of the PCI Local bus.  For mechanical 
stability the PCI Active Analysis Probe front plate should be 
secured to the PCI target system chassis. 

When removing the PCI add-in card from the card edge extender 
connector grasp the PCI Active Analysis Probe with one hand 
and the PCI add-in card with the other.  Gently rock the PCI add-
in card until it is free from the connector. 

The nature of an extender card is that it extends the etch length 
of the bus.  Due to the sensitivity of most PCI designs, extending 
the etch length can interfere with the PCI add-in card operation.  
Operation of the PCI add-in card when installed in the card edge 
extender connector is not guaranteed.  Please check your 
system design if you experience failures due to poor signal 
fidelity. 

The etch from the PCI local bus is routed directly from the PCI 
local bus to the extender card connector.  Although the etch is 
connected to the input of the PCI Active Analysis Probe input 
buffers, the extender card connector is NOT buffered from the 
PCI local bus.   

The PCI bus is extended up from the gold fingers to the input of 
the IDT162260 buffers.  From the buffer input the etch goes 
directly to the extender card connector.  The buffer input 
provides a clamping diode.  The etch is extended approximately 
5 inches from the gold fingers and is on the inner most layer of 
the board.  There are no via’s on this inner layer in order to give 
this etch a direct route. 

One issue that has been encountered with using the extender 
card connector is that the buffers need power in order to provide 
a high impedance to the signal.  This means that the logic 
analyzer must be attached to the Analysis Probe and powered 
up. The PCI Active Analysis Probe module itself is a universal 
card.  It can operate in either a 5V or 3V PCI system.