The Tektronix 1725 is a PAL/NTSC vectorscope engineered for precise analysis of analog composite video signals. It delivers critical measurements of chroma phase and amplitude to maintain signal integrity across broadcast and video production environments. The instrument combines a high-brightness CRT display with selectable line examination, adjustable gain controls, and switchable picture/vectorscope modes to support comprehensive signal evaluation and system troubleshooting.
Technical Specifications
Video Signal Formats
• PAL
• NTSC
Measurement Capabilities
• Chroma phase analysis for accurate color reproduction
• Chroma amplitude measurement for consistent color saturation
• Line-selectable display for examination of specific video lines
• Vectorscope display of chroma phase and amplitude
Display
• CRT (Cathode Ray Tube) with high brightness for visibility across varying lighting conditions
Controls
• Selectable filters to isolate specific frequency components
• Adjustable gain settings for precise signal level measurement
• Picture/vectorscope mode switching
Input Connectors
• BNC connectors for composite video signals
– Key Features
• High-brightness CRT provides clear vectorscope traces and picture display modes
• Frequency-selective filters enable isolation of specific signal components for detailed analysis
• Adjustable gain accommodates varying signal levels without manual signal conditioning
• Line-selectable measurement capability isolates individual scan lines for troubleshooting color errors
• Dual-mode operation switches between picture monitoring and vectorscope analysis
– Typical Applications
• Broadcast signal alignment and quality assurance
• Video distribution system troubleshooting
• Color parameter verification in production facilities
• PAL and NTSC signal validation
• Composite video system maintenance
– Compatibility & Integration
The 1725 accepts standard analog composite video signals conforming to PAL and NTSC standards. BNC input connectors interface with existing broadcast infrastructure. The benchtop form factor integrates into analog video production and broadcast monitoring workflows.
