The Curtiss-Wright/VMETRO PBT-315B is a single-slot PCI short card analyzer that captures, displays, and analyzes PCI bus transactions in real time. It monitors 91 PCI signals plus 8 external inputs, supporting both 32-bit and 64-bit PCI architectures at clock speeds up to 33 MHz. Engineers use it for debugging, verification, and protocol analysis of PCI-based systems, with protocol-sensitive sampling that triggers on arbitration, interrupts, and cache cycles without extensive manual probing.
## Technical Specifications
• **Form Factor:** Single-slot PCI short card
• **PCI Bus Compatibility:** 32-bit and 64-bit architectures
• **PCI Clock Speed:** Up to 33 MHz (min. 20 MHz)
• **Trace Buffer (Model B):** 32K × 128 bits
• **Input Channels:** 91 PCI signals + 8 external inputs on pin header
• **Temporal Resolution:** 30 ns @ 33 MHz
• **Latency Tag:** Counts wait states from FRAME# to TRDY# assertion (max. 128 clocks)
• **Counters:**
– Four 20-bit occurrence counters
– Three 20-bit delay counters
– Four 20-bit event counters for statistics
## Key Features
• **Dual Sampling Modes:** TRANSFER-synchronous (one sample per valid Data Phase for software analysis) or CLOCK-synchronous (one sample per PCI CLK cycle for hardware analysis)
• **Address/Data Demultiplexing:** Automatic demultiplexing of Address/Data and COMMAND/BEx# with intuitive mnemonic display
• **Flexible Triggering:** Four full-width word recognizers with RANGE, NOT, and BINARY operators; supports hex, binary, or command mnemonics (MemRd, IOWri, etc.)
• **16-Level Sequencer:** Implements IF, ELSE, ELSIF, GOTO, COUNT, DELAY, TRIGGER, STORE, SAMPLING MODE, and HALT functions
• **Trigger Output:** TTL-level output with programmable polarity, level, or pulse mode
• **External Power Provision:** Supports optional external power supply for systems with marginal power
• **Control Interface:** RS232 operation via two RS232C serial ports
## Typical Applications
Development and debugging of PCI hardware and software; protocol verification; system integration troubleshooting; latency and arbitration analysis.
## Compatibility & Integration
Operates with PCI systems running 20–33 MHz clock frequencies. External triggering and monitoring available through TTL output and 8 auxiliary input channels.
