The Tektronix WFM91 is a portable handheld multifunction monitor that delivers waveform, vectorscope, picture, and audio analysis in a single compact unit. Built for field production, equipment installation, and video/audio system troubleshooting, it combines four essential measurement tools into one 4-inch TFT LCD display platform, eliminating the need for multiple instruments on location.
Technical Specifications
Display & Video System
• 4-inch (102 mm) diagonal TFT LCD color display with adjustable viewing angle
• PAL system support
• Composite analog video input (1)
• Composite analog external reference input (1)
• Composite video output (1) — outputs waveform, vector, or audio display in monochrome full-screen or integrated into color picture
Waveform Monitor
• Sweep modes: 1H, 2H, 2V
• Vertical gain: X1, X5, or variable (45% to 155%)
• Selectable filters: Flat, Luminance (low pass)
• Signal level alarm at 700 mV
• Full-screen or corner-integrated display
Vectorscope Monitor
• Gain: X1, X5, or variable (45% to 155%)
• 360-degree phase rotation control
• Bar amplitude selection: 75% or 100%
• Signal level alarm at 700 mV
• Full-screen or corner-integrated display
Picture Monitor
• Full-screen, unprocessed color video display
• NTSC Safe Action, Safe Title, and PAL Safe Area highlight capability
• Hue and color adjustment controls
Audio Monitor
• Single-channel voltage vs. time display
• Selectable reference levels: 0, 4, 8, 12 dBu
• Full-screen or corner-integrated display
• Stereo headphone output (mono input drives both channels)
Line Select
• Individual video line selection capability
– Key Features
• Waveform-in-Picture (WIP) mode integrates waveform, vector, or audio into any corner of picture display
• Battery or external power operation
• Compact form factor: 244 mm (H) × 127 mm (W at display) × 81 mm (D at display)
– Electrical & I/O
Power Options
• Internal NiCd battery pack or six alkaline C cells
• 12 V DC adapter
• 12-volt cigarette lighter adapter
• AC adapter charging for NiCd battery
Audio Interface
• 1 balanced XLR analog audio input
• 1 stereo headphone jack output
– Typical Applications
Field video system verification, broadcast equipment commissioning, production truck monitoring, and real-time composite video/audio troubleshooting where single-unit portability is essential.
