Make
Tektronix
Model
2225

Tektronix 2225
Tektronix 2225 Oscilloscope Technical Description
Overview
The Tektronix 2225 is a rugged, lightweight, dual-channel analog oscilloscope designed for precise signal analysis with a bandwidth of 50 MHz. Featuring a compact design and a high-quality 80 x 100 mm cathode-ray tube (CRT) display with P31 phosphor, it delivers a bright, sharply defined trace for accurate waveform visualization. This oscilloscope is well-suited for electronics professionals, hobbyists, and students requiring reliable performance for troubleshooting, production testing, and design applications.
Key Specifications
Vertical System
- Channels: 2
- Bandwidth: ≥50 MHz (≥5 MHz with ×10 vertical magnification)
- Deflection Factors: 5 mV/div to 5 V/div in a 1-2-5 sequence; 500 μV/div with ×10 vertical magnification
- Input Impedance: 1 MΩ ± 2% in parallel with 25 ± 2 pF
- Maximum Input Voltage: 400 V (DC + peak AC) or 800 V p-p AC at ≤10 kHz
- Vertical Modes: CH1, CH2, Dual (CHOP or ALT), ADD, and CH2 INVERT
- Vertical Magnification: ×10, increasing sensitivity to 500 μV/div with bandwidth limited to 5 MHz
- Coupling: AC, DC, or GND
- Rise Time: ≤7 ns (≤70 ns with ×10 vertical magnification)
- Bandwidth Limiting: Independent 5 MHz bandwidth limit per channel for noise reduction
Horizontal System
- Sweep Speeds: 0.5 s/div to 50 ns/div in a 1-2-5 sequence
- Magnification: ×5, ×10, ×50, extending fastest sweep to 5 ns/div
- Variable Sweep: ≥2.5:1 for fine adjustment
- X-Y Mode: CH1 (X-axis) and CH2 (Y-axis) with ±3° phase accuracy from DC to 150 kHz
- Position Control: X-position adjustment for magnified sweeps
Trigger System
- Sources: CH1, CH2, LINE, EXT, or EXT/10
- Modes: P-P AUTO, NORM, TV LINE, TV FIELD, SGL SWP (single sweep)
- Sensitivity: 0.3 div or 40 mV at 5 MHz; 1 div or 200 mV at 50 MHz
- Coupling: AC, DC, HF REJECT, LF REJECT
- Holdoff: Variable, up to 10:1, for stable triggering on complex waveforms
- External Trigger Input: 1 MΩ ± 2% in parallel with 25 ± 2 pF; max input 400 V (DC + peak AC)
Z-Axis Input
- Sensitivity: 5 V causes noticeable modulation (positive decreases intensity)
- Bandwidth: DC to 5 MHz
- Maximum Input: 400 V (DC + peak AC) or 800 V p-p AC at ≤10 kHz
CRT and Display
- Type: 154-0907-00 CRT with P31 phosphor
- Display Area: 80 x 100 mm
- Acceleration Voltage: 12.6 kV
- Graticule: Internal, 8 x 10 divisions (1 div = 1 cm)
- Controls: INTENSITY, FOCUS, TRACE ROTATION, BEAM FIND
Calibrator
- Output: 0.5 V ± 5% into 1 MΩ load
- Frequency: 1 kHz ± 20%
- Waveform: Square wave for probe compensation
Power Requirements
- Input Voltage: 95–128 V AC or 185–250 V AC, 48–440 Hz
- Power Consumption: ≤70 W (80 VA)
- Optional DC Operation: Option 07 (Internal DC Inverter) supports 11.8–30 V DC with 1104A battery for ≥2 hours operation at 20–30°C
Physical Characteristics
- Dimensions: 137 mm (H) x 360 mm (W) x 440 mm (D)
- Weight: Approximately 6.5 kg (14.3 lbs)
- Construction: Metal case with plastic front panel
- Cooling: Forced-air ventilation
Environmental Characteristics
- Operating Temperature: 0°C to +40°C
- Storage Temperature: -40°C to +75°C
- Humidity: Up to 95% RH at 40°C
- Altitude: Operating up to 4,600 m; non-operating up to 15,000 m
Features
- High Sensitivity: 500 μV/div sensitivity with ×10 magnification for low-level signal analysis
- Stable Triggering: P-P AUTO mode for hands-free triggering, with TV LINE and TV FIELD modes for video signal analysis
- Flexible Triggering: HF/LF reject filters and variable holdoff for complex waveforms
- Alternate Magnification: Displays normal and magnified traces simultaneously
- Probe Compatibility: Includes two P6103 10X probes (2 m); optional P6122 or P6062B 1X/10X probes
- Ease of Use: Intuitive front-panel layout with dedicated controls for vertical, horizontal, and trigger systems
- Portability: Lightweight design with optional handle and battery operation for field use
Options and Accessories
- Standard Accessories: Two P6103 10X probes, power cord, fuse, operator’s manual
- Options:
- Option 02: Front cover and pouch
- Option 04: C-5C camera compatibility
- Option 07: Internal DC inverter for battery operation
- Option 1C: Camera option
- Option 1K: K212 cart
- Option 1R: Rackmount kit
- Option 18: P6122 10X probes
- Option 23: P6062B 1X/10X probes
- Option 30: Option 07 + 1104A battery
- Optional Accessories: Rackmount kit, protective cover, additional probes
Applications
The Tektronix 2225 is ideal for:
- Troubleshooting: Diagnosing faults in electronic circuits
- Production Testing: Verifying component and system performance
- Design: Analyzing signal characteristics during circuit development
- Education: Teaching signal analysis and oscilloscope operation
Additional Notes
The 2225 was produced from 1987 to 1992 and developed in Hoddesdon, UK, with manufacturing in Heerenveen, Netherlands. A 2225ST variant includes digital storage capabilities. The oscilloscope complies with German Postal Service regulations (Vfg. 1046/1984) for electromagnetic compatibility.