The VIAVI Solutions/JDSU 121T-1700-4.9-TTL-2 is a regulated DC power supply delivering 1700 VDC at 4.9 mA output, engineered for high-voltage laser tube excitation and similar demanding applications. Operating from 20–28 VDC input with >85% conversion efficiency, the unit provides constant-current regulation and exceptional DC stability. TTL-level control interface enables remote switching between high and low states. Complete fault protection handles output short circuits, open circuits, and arc-to-ground conditions without shutdown.
Technical Specifications
• Output Voltage: 1700 VDC
• Output Current: 4.9 mA
• Input Voltage: 20–28 VDC (nominal 24 VDC)
• Conversion Efficiency: >85% typical
• Output Regulation: Constant-current, highly regulated
• Control Interface: TTL-level switch with high/low selection
• Input: 12-inch flying leads
• Approximate Weight: 3 lbs.
– Key Features
• Exceptional DC stability for optical performance consistency
• Complete fault protection against short circuit, open circuit, and arc-to-ground conditions
• Low-noise operation optimized for laser system integration
• CDRH time-delay circuit with defeat capability
• Compact rugged packaging
• Designed for extended operating life
– Typical Applications
HeNe laser tube excitation and power delivery in optical instrumentation, particularly systems requiring 1700 V at milliamp-level currents with high-impedance, low-noise characteristics.
– Compatibility & Integration
Designed for integration with JDSU/VIAVI HeNe laser heads and tubes in the 1100 series. Associates with the 111-1700-4.9-TTL-2 laser head model.
