The Tektronix 2465 is a classic 300 MHz, four-channel analog oscilloscope known for its reliability, crisp CRT display, and comprehensive on-screen readout and cursor measurement system. Highly regarded in both engineering and service environments, it offers flexible triggering and precision sweep controls standard for the 2400 Series.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Optional GPIB (IEEE-488) via Option 10 |
| Display | 8 x 10 cm CRT with internal graticule and digital readouts |
| Cooling System | Forced-air circulation via internal fan |
| Warm-up Time | 20 minutes |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 90 - 250 V AC, 48 - 440 Hz, 120 W maximum |
| Operating Temperature | -15 °C to +55 °C |
| Dimensions (W×H×D) | 329 mm × 136 mm × 440 mm |
Vertical Deflection System
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Bandwidth (-3 dB) | 300 MHz |
| Risetime | 1.17 ns |
| Deflection Factor Range (CH1, CH2) | 2 mV/div to 5 V/div in 1-2-5 sequence |
| Deflection Factor Range (CH3, CH4) | 0.1 V/div and 0.5 V/div |
| Deflection Factor Accuracy | ±2% (+15 °C to +35 °C) |
| Input Impedance (CH3, CH4) | 1 MΩ ±1% in parallel with 15 pF ±2 pF |
| Maximum Input Voltage (1 MΩ) | 400 V (DC + peak AC) |
| Maximum Input Voltage (50 Ω) | 5 V RMS |
| Channel Isolation (Crosstalk) | 100:1 at 100 MHz, 50:1 at 300 MHz |
| Vertical Operating Modes | CH 1, CH 2, ADD, ALT, CHOP, CH 3, CH 4 |
| Chop Frequency | 1 MHz |
| Invert Channel Capability | CH 2 only |
| Delay Line (Signal Delay) | Visible signal delay allows viewing of the triggering edge |
Horizontal Deflection System (Time Base)
| Parameter | Value |
|---|---|
| Time Base Modes | A, A INTEN, ALT, B DLY'D |
| A Sweep Time Range | 500 ms/div to 5 ns/div (with x10 magnification to 500 ps/div) |
| B Sweep Time Range | 50 ms/div to 5 ns/div (with x10 magnification to 500 ps/div) |
| Sweep Time Accuracy | ±1% (A sweep, unmagnified, +15 °C to +35 °C) |
| Sweep Magnification | x10 |
| Magnified Sweep Accuracy | ±2% (A sweep, +15 °C to +35 °C) |
| Holdoff Control Range | Variable, increases sweep holdoff by at least a factor of 10 |
Triggering System
| Parameter | Value |
|---|---|
| Trigger Sources | CH 1, CH 2, CH 3, CH 4, Line, Vertical Mode |
| Trigger Modes | AUTO LEVEL, AUTO, NORMAL, SINGLE SEQUENCE |
| Trigger Coupling | DC, AC, NOISE REJ, HF REJ, LF REJ |
| Trigger Sensitivity (Internal, DC Coupled) | 0.3 div from DC to 50 MHz, 1.0 div at 300 MHz |
| External Trigger Input Impedance | 1 MΩ ±1% in parallel with 15 pF (via CH 3 and CH 4 inputs) |
| External Trigger Maximum Input Voltage | 400 V (DC + peak AC) |
X-Y Operation
| Parameter | Value |
|---|---|
| X-Y Mode Deflection Factor | Same as vertical deflection system (CH 1 for X-axis, CH 2 for Y-axis) |
| X-Axis Bandwidth | DC to at least 3 MHz |
CRT Display & Z-Axis Modulation
| Parameter | Value |
|---|---|
| CRT Type | Rectangular, internal graticule, meshless scan expansion |
| Display Area (Graticule Size) | 8 x 10 cm |
| Accelerating Potential | 16 kV |
| Phosphor Type | GH (P31) standard |
| Trace Rotation Control | Front-panel screwdriver adjustment |
| Z-Axis Input Sensitivity | Noticeable modulation at +1.8 V, positive voltage decreases intensity, +5 V blanks a trace of usable intensity |
| Z-Axis Input Bandwidth | DC to 20 MHz |
| Z-Axis Maximum Input Voltage | 30 V (DC + peak AC) |
On-Screen Readouts & Measurement Cursors
| Parameter | Value |
|---|---|
| Cursor Measurement Types | ΔV, Δt, 1/Δt (frequency), phase, ratio |
| Digital Readout Parameter Display | Volts, time, frequency, phase, scale factors, channel selection, trigger parameters |
| Auto-Setup Functionality | The original 2465 does not feature an Auto-Setup function |
Signal Outputs & Calibrators
| Parameter | Value |
|---|---|
| Calibrator Output Voltage (Amplitude) | 0.4 V ±1.0% into 1 MΩ |
| Calibrator Output Frequency | 1 kHz nominal |
| Calibrator Waveform Shape | Square wave |
| Channel 1 Vertical Output Voltage | Channel 2 Vertical Output Voltage = Approximately 20 mV/div into 50 Ω (rear panel) |
Environmental & Safety Compliance
| Parameter | Value |
|---|---|
| Storage Temperature Range | -55 °C to +75 °C |
| Operating Humidity Range | Up to 95% RH at +30 °C to +40 °C, non-condensing |
| Operating Altitude Limit | Up to 15,000 feet (4,500 m) |
| Safety Standards and Certifications | Conforms to UL 1244, CSA C22.2 No. 231 |
Vertical System
| Parameter | Value |
|---|---|
| Input Coupling Modes (CH1, CH2) | AC, DC, GND, and 50 Ω DC |
| Input Coupling Modes (CH3, CH4) | DC only |
| Common Mode Rejection Ratio (CMRR) | At least 20:1 at 50 MHz (with CH2 inverted) |
| Bandwidth Limit | 20 MHz (±4 MHz) |
| CH 1 to CH 2 Delay Match | ≤ 100 ps |
Horizontal System
| Parameter | Value |
|---|---|
| Delay Jitter | 1 part or less in 20,000 (0.005%) of the maximum available delay |
| Sweep Separation Range | At least ±4 divisions |
Display
| Parameter | Value |
|---|---|
| CRT Graticule Markings | Internal 8 × 10 cm graticule with 0%, 10%, 90%, and 100% risetime reference lines |
Z-Axis Modulation
| Parameter | Value |
|---|---|
| Z-Axis Input Resistance | 9.1 kΩ ± 10% |
Power Requirements
| Parameter | Value |
|---|---|
| Line Voltage Range | 90 V to 250 V AC (automatically selected) |
| Line Frequency Range | 48 Hz to 440 Hz |
| Maximum Power Consumption | 150 W (with options) |
Environmental
| Parameter | Value |
|---|---|
| Environmental Shock | MIL-T-28800C, Type III, Class 5 (50 g, half-sine, 11 ms) |
| Environmental Vibration | MIL-T-28800C, Type III, Class 5 (5 Hz to 55 Hz, 0.015 inch p-p) |
Technology
Analog Oscilloscope
Applications
Electronic Design, Signal Analysis, Troubleshooting, Education
Looking for the Tektronix 2465?
Tell us what you need. We're building a network of equipment dealers and will get back to you if we can help source it — no obligation.
Selling this kind of equipment? Sell with us