The Tektronix 7111-S is a quad 1×10 Form C multiplexer card engineered for signal routing and switching in modular test systems. This plug-in module integrates with Tektronix 7000-series oscilloscopes and compatible Keithley mainframes to deliver flexible signal path management across 40 Form C channels. The unit excels in applications demanding precise low-level signal integrity, featuring minimized contact potential and offset current to preserve measurement accuracy in sensitive circuits. Configuration is straightforward via jumper selection for one, two, three, or four active multiplexer banks, with backplane jumpers providing optional isolation of bank outputs from the mainframe analog backplane.
Technical Specifications
Switching Matrix
• Quad 1×10 Form C multiplexer configuration
• 40 total Form C channels (10 channels per bank × 4 banks)
• Single pole, double throw (Form C / SPDT) relays
• Minimized offset current and contact potential for low-level signal applications
• Configurable bank operation via jumper selection
• Backplane jumper disconnection available
Physical & Interface
• Screw terminal connector card for external circuit wiring
• Detachable connector card assembly for terminal and jumper access
• Mass: approximately 0.85 kg (1 lb 14 oz)
• Low-voltage signal path design
– Key Features
• Modular architecture enables integration into existing Tektronix and Keithley systems
• Form C relay topology supports both switching and multiplexing operations
• Flexible jumper-based bank configuration without card modification
• Screw terminal interface accommodates custom wiring schemes
• Low-level signal conditioning preserves measurement fidelity in precision applications
– Typical Applications
• Research and development signal routing
• Electronics manufacturing test automation
• Laboratory measurement systems requiring multi-channel switching
• Complex test environments with diverse signal management needs
– Compatibility & Integration
Designed for integration with Tektronix 7000-series mainframes and compatible Keithley instruments. Works in conjunction with the Model 7011-S (Form A multiplexer) and optional Model 7011-ST screw terminal connector card for expanded capabilities.
