The Tektronix 422 is a portable dual-trace oscilloscope engineered for field service and general electronic testing. With DC to 15 MHz bandwidth and a 4-inch CRT display, it delivers clear signal visualization in compact form. The instrument operates on AC line power or—in the AC/DC model—external DC (11.5V to 35V) or internal rechargeable batteries for approximately 4 hours per charge. Rugged construction and wide operating temperature range (-15°C to +55°C without batteries) make it suitable for demanding field environments up to 15,000 ft altitude.
Technical Specifications
Bandwidth & Vertical System
• Bandwidth: DC to 15 MHz; 23 nsec risetime
• Dual-channel vertical deflection: 0.01 V/div to 20 V/div (Channel 2: 0.001 V/div minimum with X10 attenuator and reduced frequency response)
• Deflection accuracy: ±3% (both X1 and X10)
• Input impedance: 1 MΩ ±2% || 33 pF ±1 pF
• Maximum input voltage: 300 V (DC + peak AC)
• Input coupling: AC (150 kHz ±20% at -3 dB), DC, GND
• Vertical linearity (low frequency): ±0.15 division
• Vertical display modes: Channel 1 only, Channel 2 only, dual-trace (chopped or alternate)
Horizontal System & Triggering
• Sweep rates: 0.5 s/div to 0.5 µs/div in 19 steps (1-2-5 sequence); X10 magnifier extends to 0.05 µs/div
• Horizontal resolution: 140 lines in 10 divisions
• External horizontal input available
• Trigger sources: Internal (Channel 1, Channel 2, both), External, Line
• Trigger modes: Auto, Triggered; AC/DC coupling; positive/negative slope
• Trigger level range: ±10 to -10 V
Display & Power
• 4-inch T422 CRT with scan expansion mesh; 7.9 sq in usable graticule area
• AC model: ~40 W; AC/DC model: ~28 W (external DC), ~30 W (AC operation)
• AC input: 92–137 VAC RMS or 184–274 VAC RMS; 45–440 Hz
• Battery runtime: ~4 hours fully charged
– Key Features
• Dual-trace capability with chopped or alternate sweep modes
• Variable deflection factor with 3% accuracy across full range
• Intuitive manual controls for field operation
• Compact, transportable design with shock and vibration protection
– Typical Applications
• Field service and troubleshooting of electronic circuits
• General-purpose signal measurement and characterization
• Portable laboratory testing in remote or field locations
– Compatibility & Integration
• Signal inputs: Two BNC connectors (INPUT 1, INPUT 2)
• External control: BNC connector for external horizontal or trigger input
