The Tektronix 2445B is a 150 MHz, 4-channel analog oscilloscope from the renowned Tektronix 2400 Series, known for its high-performance triggering, automated on-screen readouts, and cursor measurements.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | GPIB (Option 10) |
| Display | 8 x 10 cm CRT with internal graticule and on-screen readouts |
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 x 137 mm x 439 mm (cabinet only) |
| Weight | 9.3 kg |
Vertical System
| Parameter | Value |
|---|---|
| Number of Channels | 4 |
| Bandwidth (-3 dB) | 150 MHz |
| Rise Time | 2.33 ns |
| Deflection Factor Range (CH 1, CH 2) | 2 mV/div to 5 V/div (in 1-2-5 sequence) |
| Deflection Factor Range (CH 3, CH 4) | 0.1 V/div and 0.5 V/div |
| Deflection Factor Accuracy | ±2% |
| Variable Sensitivity Range (CH 1, CH 2) | Continuously variable between steps, extends deflection factor to at least 12.5 V/div |
| Vertical Input Coupling (CH 1, CH 2) | AC, DC, GND |
| Vertical Input Coupling (CH 3, CH 4) | DC only |
| Input Impedance (Resistance) | 1 MΩ (±0.5%) or 50 Ω (±1%) |
| Input Impedance (Capacitance) | 15 pF (±2 pF) (in parallel with 1 MΩ) |
| Maximum Safe Input Voltage (1 MΩ) | 400 V (DC + peak AC) |
| Maximum Safe Input Voltage (50 Ω) | 5 V RMS |
| Common Mode Rejection Ratio (CMRR) | At least 20:1 at 50 MHz |
| Vertical Operating Modes | CH 1, CH 2, CH 3, CH 4, ADD, ALT, CHOP, INVERT (CH 2) |
| Vertical Chop Frequency | Approximately 1 MHz |
| Channel 1 to Channel 2 Delay Match | ≤ 100 ps |
| Signal Delay | ≥ 20 ns of visible pre-trigger trace |
| Channel 2 Invert Capability | Selectable on Channel 2 |
| Bandwidth Limit Filter | 20 MHz |
| Vertical Dynamic Range (CH 1, CH 2) | ±8 divisions from graticule center |
Horizontal System
| Parameter | Value |
|---|---|
| Time Base A Sweep Speed Range | 500 ms/div to 10 ns/div (in 1-2-5 sequence) |
| Time Base B Sweep Speed Range | 50 ms/div to 10 ns/div |
| Sweep Speed Accuracy | ±0.7% (+15°C to +35°C, A sweep) |
| Horizontal Magnifier | x10 (extends fastest sweep speed to 1 ns/div) |
| Horizontal Operating Modes | A, A INTEN, ALT, B (Delayed) |
| X-Y Operation Bandwidth | DC to 3 MHz |
| X-Y Phase Difference | 1° or less from DC to 1 MHz |
Triggering System
| Parameter | Value |
|---|---|
| Trigger Sources | CH 1, CH 2, CH 3, CH 4, LINE |
| Trigger Coupling Modes | AC, LF REJ, HF REJ, DC, NOISE REJ |
| Trigger Modes | AUTO LEVEL, AUTO, NORM, SINGLE SEQ |
| Internal Trigger Sensitivity | 0.3 div from DC to 10 MHz, 1.0 div at 150 MHz |
Display and CRT Specifications
| Parameter | Value |
|---|---|
| CRT Type | Rectangular, internal graticule, meshless scan expansion |
| Display Area (Graticule Size) | 8 x 10 cm |
| Accelerating Voltage | 16 kV |
| Phosphor Type | P31 standard |
| Trace Rotation Adjustment | Front-panel screwdriver-adjustable |
| Z-Axis Modulation Input Impedance | 9 kΩ |
On-Screen Readouts and Cursor Measurements
| Parameter | Value |
|---|---|
| Cursor Functions | Volts (ΔV), Time (Δt), 1/Time (1/Δt), Phase, Ratio |
Signal Outputs and Calibration
| Parameter | Value |
|---|---|
| Probe Calibrator Output Voltage | 0.4 V (±1%) into 1 MΩ |
| Probe Calibrator Output Frequency | 1 kHz (±20%) |
| Channel 1 Vertical Signal Output | 20 mV/div (±10%) into 50 Ω |
Physical Characteristics
| Parameter | Value |
|---|---|
| Cooling System | Forced-air cooling (internal fan) |
Environmental and Safety
| Parameter | Value |
|---|---|
| Storage Temperature Range | -62°C to +85°C |
| Operating Humidity Range | Up to 95% RH at 40°C |
| Operating Altitude Range | Up to 4,500 m (15,000 ft) |
Power Requirements
| Parameter | Value |
|---|---|
| AC Line Voltage Range | 90 V to 250 V AC (continuous range) |
| AC Line Frequency Range | 48 Hz to 440 Hz |
| Maximum Power Consumption | 120 W (typically 85 W without options) |
Environmental
| Parameter | Value |
|---|---|
| Environmental Shock | 50 g, half-sine, 11 ms duration |
Option 10 (GPIB Interface)
| Parameter | Value |
|---|---|
| GPIB Interface Option (Option 10) Codes | SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT0, C0, E1 |
Option 01 (DMM)
| Parameter | Value |
|---|---|
| Digital Multimeter DC Voltage Accuracy | ±(0.15% of reading + 1 count) (Option 01) |
| Digital Multimeter AC Voltage Accuracy | ±(0.6% of reading + 10 counts) from 40 Hz to 20 kHz (Option 01) |
Option 09 / 15 (CTT / Word Recognizer)
| Parameter | Value |
|---|---|
| Word Recognizer Input Channels | 17 bits (Option 09 / Option 15) |
Option 06 / 09 (Counter/Timer/Trigger)
| Parameter | Value |
|---|---|
| Counter/Timer Timebase Standard Accuracy | 10 ppm (Option 06 / Option 09) |
| Counter/Timer High-Stability Timebase Accuracy | 0.1 ppm (with Option 1E or 1T) |
General & Interface
| Parameter | Value |
|---|---|
| Setup Memory Capacity | 30 front-panel setups |
Auxiliary Inputs & Outputs
| Parameter | Value |
|---|---|
| Maximum Z-Axis Input Voltage | 30 V (DC + peak AC) / 30 V p-p at 100 kHz |
Display System
| Parameter | Value |
|---|---|
| Beam Finder | Compels display to within the graticule area regardless of position control settings |
| Graticule Illumination | Continuously variable |
Options
| Parameter | Value |
|---|---|
| Option 11 Probe Power Outputs | ±5 V and ±15 V (up to 150 mA per output, supports 2 active probes) |
| Option 05 TV Trigger Formats | NTSC, PAL, SECAM |
Technology
Analog
Applications
Electronic testing, waveform analysis, and troubleshooting