The FS3020 CompactPCI bus analysis probe and extender card provides three functions:
Acts as an extender for a CompactPCI card beyond the CompactPCI card cage front panel, providing access to both sides for easy debug.
Provides an electrical and mechanical interface to Agilent logic analyzers for passive CompactPCI bus analysis.
Provides test points to measure the power and signal fidelity of the CompactPCI bus.
The CompactPCI protocol decode software executes in the Agilent logic analyzer. In State Analysis mode, the analyzer master clock is the CompactPCI clock. The bus protocol decode software decodes the key CompactPCI bus signals and presents a readable display that lists the transaction type, address, data and key status conditions such as wait states and retries. The software also supports user-defined symbols that can be easily added to the state listing display. The user can also select post-processing filters which allow the acquired data to display only chosen transactions. To assist with triggering, pre-defined resource terms have been included that can be used to prevent WAIT and IDLE states from being acquired, thus saving trace memory and providing an easier-to-read state display. FuturePlus Systems also provides a CompactPCI bus triggering application note to all its CompactPCI Analysis Probe customers.
NOTE: Electrically, the 64-bit PCI bus is extended approximately 10 inches in etch length. Depending on the design of the system, users may experience difficulties with this extension of the CompactPCI bus. The passive logic analyzer termination presents a single electrical load on the PCI bus via low capacitance (10 pf), high impedance terminators, and also provides a matched impedance to the logic analyzer. The analysis probe includes seven 40-pin logic analyzer connectors. High speed Schottky clamping diodes connected to the CompactPCI bus signals and physically mounted near the extender connector prevent the added etch length from causing unwanted reflections back onto the bus.