Keysight / Agilent / HP 98543A Video Output Card

The Keysight/Agilent/HP 98543A is a video output card designed for the HP 9000 Series 300 family of modular computers. This DIO-2 slot card delivers medium-resolution color video output, enabling visual display and analysis of workstation-generated data. The card generates RGB signals across three BNC connectors with sync-on-green composite, operating at 25.5 kHz horizontal scan frequency and 60 Hz vertical refresh rate. It supports 512 x 400 pixel resolution with 16-color depth, making it suitable for legacy HP 9000 workstations that require integrated video capabilities without external graphics subsystems.

## Technical Specifications

• Resolution: 512 x 400 pixels
• Color Depth: 16 colors
• Horizontal Scan Frequency: 25.5 kHz
• Vertical Refresh Rate: 60 Hz
• Video Signal: RGB with sync-on-green composite
• Output Connectors: Three BNC connectors (RGB)
• Interface: DIO-2 slot

## Key Features

• Medium-resolution color output for HP 9000 Series 300 systems
• Sync signal mixed with green channel for simplified cabling
• Direct DIO-2 slot integration into modular computer architecture
• 60 Hz vertical refresh eliminates flicker during interactive use
• Support for legacy sync-on-green capable monitors

## Typical Applications

• Data visualization on HP 9000/310, 9000/320, 9000/362, and 9000/382 workstations
• Real-time monitoring and analysis displays in HP 9000 Series 300 systems
• Integration with Bus Expander configurations for extended system accessory support

## Compatibility & Integration

The 98543A fits directly into DIO-2 slots within HP 9000 Series 300 modular computers. Monitor compatibility requires displays with sync-on-green capability and tolerance for 25.5 kHz horizontal scan rates. Older Sony monitors with sync-on-green support offer native compatibility. Modern display integration may require specialized sync converters due to the card’s non-standard scan frequency and composite sync architecture. The card functions as part of the larger HP 9000 Series 300 system architecture and may operate alongside Bus Expander modules for additional slot configurations.