The HP E4504A and E1330B are complementary VXI modules that expand automated test system capabilities through optical switching and digital I/O control. The E4504A is a C-size single-slot dual optical 1×4 multiplexer for optical signal routing in VXI-based measurement systems. The E1330B is a B-size single-slot quad 8-bit digital input/output module offering configurable port logic, multi-word data transmission modes, and handshaking control lines for instrument integration.
Technical Specifications
HP E4504A Optical Multiplexer
• Module type: VXI Interface Module
• Form factor: Single-slot, C-size
• Configuration: Dual independent 1×4 optical multiplexer paths
HP E1330B Digital I/O Module
• Module type: VXI Digital Input/Output Module
• Form factor: Single-slot, B-size, register-based
• Port configuration: Quad 8-bit digital input or output ports
• Data transmission modes: Bit, byte (8-bit), word (16-bit), long word (32-bit)
• Logic support: Positive or negative true logic per port
• Handshake lines: FLG (Flag), CTL (Control), I/O (Input/Output status)
• Control lines: PIR (Peripheral Interrupt), /RES (Peripheral Reset), STS (Status)
• Interrupt handling: Release on Interrupt Acknowledge (ROAK)
• Standard accessories: Two 3-meter, 60-wire ribbon cables with insulation displacement header connectors
– Key Features
• Independent optical path switching via dual 1×4 multiplexer architecture
• Per-port input/output configuration without module reconfiguration
• Multi-level handshaking and interrupt support for complex test sequences
• ROAK interrupt circuitry compatible with C-SCPI, ISCPI in SICL, and VXIplug&play drivers
• Flexible data word alignment for 8-bit through 32-bit operations
– Typical Applications
• Automated optical signal routing and multiplexing in test systems
• Digital instrument control and status monitoring
• Multi-channel data acquisition with handshake synchronization
• Custom interrupt-driven test sequence management
– Compatibility & Integration
Both modules integrate into VXIbus-compliant mainframes. The E4504A occupies C-size slots directly. The E1330B operates in B-size slots or requires an E1403C Adapter for C-size mainframe installation. Supported command modules include E1300A/E1301A, E1306A, and E1405A/B/E1406A. The HP Digital I/O Driver enables operation with B-size mainframes or HP E1405/06 Command Modules in C-size configurations.
