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Digital Real-Time™ Oscilloscopes

TDS340A * TDS360 * TDS380

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TDS340A * TDS360 * TDS380

Features & Benefits

  • 100 MHz, 200 MHz, 400 MHz Bandwidths
  • 500 MS/s, 1 GS/s, 2 GS/s Sampling Rates
  • Two Input Channels
  • Built-In 3.5 in. Floppy Disk Drive
  • 2 mV/div to 10 V/div
  • AutoSetup
  • Accumulate Display Modes
  • 2% Vertical Accuracy
  • 1K Record Length
  • Roll Mode
  • 21 Automatic Measurements
  • FFT Analysis
  • 10 ns Peak Detect for High-speed Glitch Capture
  • Option 14 for GPIB, RS-232-C Programmability, Parallel Printer Interface, & VGA Monitor Output

Tektronix Digital Real-Time

With the TDS300 Series, Tektronix redefines the low-cost digital oscilloscope. No other digital scope offers as much bandwidth and sample rate for the price. By simultaneously sampling at up to five times their bandwidth on both channels, the TDS300 Series assures you of true acquisitions, minimizing aliasing or other digital sampling effects. Unlike other DSOs, the TDS300 Series easily gathers enough samples to display waveforms accurately at their full bandwidth. These are the only scopes in their class to reliably acquire high speed transient or single-shot events to their full bandwidth.

Many low-cost DSOs offer only dot displays, which can be hard to interpret, especially for those accustomed to analog oscilloscopes. The TDS300 Series has Dot, Dot Accumulate, Vector, and Vector Accumulate displays. The Accumulate display modes gather multiple waveforms for a user-defined time (500 ms to infinity), after which the screen is erased. Vector Accumulate mode uses bright vectors to superimpose the current acquisition over the accumulated waveforms. The display is erased at the user-defined time or when the acquisition setting is changed. These modes are useful for doing worst case analysis or signal monitoring. Long term monitoring is easily accomplished by setting the erase time to infinity.

Oversampling Minimizes Aliasing

All of the TDS300 scopes sample at five times their bandwidth, assuring users of accurate real-time acquisition up to the full bandwidth of the scope, even for single-shot events. This is well beyond the theoretical two samples per period necessary for a DSO to acquire a true signal. If a DSO cannot sample at least twice as fast as the highest frequency component, aliasing occurs and the scope displays a waveform with a lower frequency than that of the actual input signal. The TDS300 Series' high degree of oversampling not only minimizes aliasing, it also provides a higher resolution waveform.

Acquisition Power

With edge triggering and basic video triggering as standard features, the TDS300 Series can capture the waveforms that designers and service technicians must see.

In addition to 21 automatic waveform measurements, these scopes have four acquisition modes. Sample mode provides real-time sampling at the highest throughput rate. At slower sweep speeds, Peak Detect indicates if there is higher frequency information buried in a waveform, warning the user to increase the sweep speed to avoid aliasing. Envelope mode, by including the highest and lowest points over many acquisitions, shows variations in the signal over time. From several acquisitions, Average mode calculates an average value for each waveform point, reducing apparent noise in repetitive signals.

Analog Simplicity, Digital Productivity

By balancing the use of on-screen menus with dedicated buttons and knobs, the user-friendly TDS interface retains traditional analog simplicity yet gives quick access to the wide range of digital functions. Frequently used functions, like position and trigger level, are controlled directly with buttons and knobs; secondary functions are menu-driven, eliminating the profusion of buttons found on most low-cost scopes.

The modern graphical user interface dramatically reduces learning time, appealing to users regardless of their digital scope experience. The interface simplifies scope operation without limiting the instrument's capabilities.

3.5-in. Floppy Disk Drive

All three models include a 3.5-inch, DOS-compatible floppy disk drive. Simply save screen images or data to disk, then insert the disk into your PC for importing to desktop publishing or spread sheet programs.

Advanced Math Signal Processing/FFT

Waveform functions are extended through the addition of "live" FFT analysis of waveforms. This added function makes the TDS300 Series ideal for research and analysis applications, such as power supply design and mechanical analysis where power line harmonic distortion and resonance are critical measurements.

Communications and Printing

Option 14, the communications option, includes GPIB and RS-232-C interfaces, VGA monitor output, and a Centronics-type parallel printer port. With this option one can control the scope from a remote computer for automated testing or waveform and measurement data exchange.

Interleaf (.img), TIF, PCX, BMP, and EPS file formats allow screen captures to be placed directly into desktop published documents. Or, at the push of a button, the scope display can be output directly to a variety of compatible printers.

For service, education, and design work, the TDS300 Series is without peer among low-cost DSOs.

WaveStar™ Software

WaveStar™ Software is a Windows 95/NT™ application bringing Tektronix oscilloscope measurement information to your PC desktop. WaveStar's familiar Windows 95/NT features, such as drag and drop, provide the user a quick and simple means for inserting important instrument information into other Microsoft Office™ or Windows™ compatible applications. WaveStar software allows users to easily capture, analyze, and record instrument data, as well as professionally create, save, and print documents. WaveStar also enables remote access and control of multiple Tektronix instruments from a PC, without the need for programming.

WaveStar FOR OSCILLOSCOPES (WSTRO) Characteristics

Instrument Interface Support - GPIB or RS-232 interfaces with Full Talk-Listen modes

Windows Clipboard - Drag and drop, or copy/paste through Windows common clipboard, to compatible Microsoft Office Applications

Printer Plotter Support - Uses standard Windows printer drivers

Waveform Export Format - Microsoft® Excel 6.0 compatible

Computer Configuration

Requirements -

Type: IBM PC-Compatible

Operating systems: Win95 or Win NT

CD-ROM Drive: 4x or better

Monitor: Super VGA

Recommendations -

Processor: Pentium, 100 MHz

Ram: 16 M

Instrument Interface Card -

GPIB: National Instruments IEEE-488 Interface Card

RS-232: One free RS-232 port

Ethernet 10 Base T interface Card (Inquire about AD007, GPIB to LAN adapter)


Signal Acquisition System

Bandwidth -

TDS340A: 100 MHz

TDS360: 200 MHz

TDS380: 400 MHz

Sample Rate -

TDS340A: 500 MS/s on each channel

TDS360: 1 GS/s on each channel

TDS380: 2 GS/s on each channel

Channels - Two identical channels, each with invert function

Sensitivity - 2 mV to 10 V/div (with calibrated fine adjust)

Position Range - ±5 divisions

Calibrated Offset Ranges -

Volts/Div Setting

Offset Range

2 - 99.5 mV/div

±1 V

100 - 995 mV/div

±10 V

1 - 10 V/div

±100 V

DC Gain Accuracy - ±2%

Vertical Resolution - 8-Bits (256 levels over 10.24 vertical divisions)

Acquisition Modes - Sample, Envelope, Average

Peak Detect - High-frequency and random-glitch capture; Captures glitches as narrow as 10 ns using acquisition hardware at all time/div settings between 25 µs/div and 5 s/div (inclusive)

Time Base System (Main and Delayed)

Time/Division Range -

TDS340A: 5 ns to 5 s/div

TDS360: 2.5 ns to 5 s/div

TDS380: 1 ns to 5 s/div

Record Length - 1000 sample points per channel

Horizontal Accuracy - ±0.01%

Roll Mode - 0.1 s/div and slower when Auto Trigger Mode is selected

Triggering System (Main Only)

Trigger Types - Edge, Video

Trigger Modes - Auto, Normal

Trigger Inputs - CH1, CH2, Line, External

Video-Type Trigger Formats and Field Rates - Triggers on Field 1, Field 2, Any Field (noninterlaced systems), or Lines; from Sync-negative composite video. Triggers on broadcast standard NTSC, PAL, or SECAM video and other interlaced and noninterlaced video with horizontal line rates from 15 to 65 kHz (in 5 ranges) and field rates from 50 to 60 Hz.


Sin(x)/x Interpolation

Vector - Connects sample points to display a continuous waveform

Dots - Displays sample points only

Vector Accumulate Mode - Accumulates waveform points over a preset period of time (500 ms to infinity) and superimposes the current waveform with bright vectors

Dot Accumulate Mode - Accumulates waveform points over a preset period of time (500 ms to infinity)

Format - YT and XY

Automatic Measurements
  • Period
  • Frequency
  • +Width
  • -Width
  • Rise Time
  • Fall Time
  • +Duty Cycle
  • -Duty Cycle
  • +Overshoot
  • -Overshoot
  • High
  • Low
  • Max
  • Min
  • Pk-Pk
  • Amplitude
  • Mean
  • Cycle Mean
  • RMS
  • Cycle RMS
  • Burst Width

Types - Horizontal bars, vertical bars, paired (volts at time)

Measurements - Absolute volts, DELTA volts, time, and frequency

Physical Characteristics
















Width w/ handle





Height w/ pouch





   w/o pouch





Depth (stand alone)





   w/ front cover





   w/ handle(s)










Domestic Shipping





*1 Weight of conversion kit only.

Waveform Processing

Arithmetic Operators - Add, subtract, multiply

AutoSetup - Single button automatic setup on selected input signal for vertical, horizontal, and trigger systems

FFT Analysis - A mixed radix FFT routine is applied to the time domain waveforms to analyze frequency content. A Hanning Window is always applied to the acquired signal. The display uses dBVRMS vertical scaling.

Non-Volatile Storage

Waveforms - Two 1000 point reference waveforms

Setups - 10 front panel setups

Floppy Drive -

3.5 in., 1.44 MB or 720 K DOS-compatible

PC formats: .BMP, .TIF, .PCX, .EPS

Spreadsheet formats: Excel, Lotus123, and MathCAD for mathematical modeling and analysis

Option 14: I/O Interface

GPIB (IEEE -488.2) Programmability - Full talk/listen modes. Control of all modes, settings, and measurements.

RS-232-C Interface Programmability - Full talk/listen modes. Control of all modes, settings, and measurements. Baud Rate up to 38,400. 9-Pin, DTE.

VGA - Monitor output for direct display on large VGA-equipped monitors

Hardcopy Port - Centronics-type parallel, RS-232-C, or GPIB

DC Power for Printer

Programmer Manual - (070-9442-00)

Hard Copy Capability

Graphics File Formats - Interleaf (.img), TIF, PCX (PC Paintbrush), BMP (Microsoft Windows), and Encapsulated PostScript (EPS)

Printer Formats - Thinkjet, Deskjet, Laserjet, Epson (9- & 24-Pin), Seiko DPU 411/II, DPU 412, DPU 414

Available Printer Packs - 4 in. thermal printer and storage pack (TDS4F5P)


Cooling Method - Forced air circulation with no air filter

Environmental and Safety

Temperature -

Operating: -10° to +55°C

Nonoperating: -51°C to +71°C

Humidity -

Up to 95% RH at or below +40°C

Up to 75% RH from 41°C to 55°C

(operating and nonoperating)

Altitude -

Operating: To 15,000 ft/4,570 m

Nonoperating: To 40,000 ft/12,190 m

Electromagnetic Emissions - Meets EN50081-1; VFG 0243; FCC Rules and Regs, 47 CFR, Part 15, Subpart B, Class A

Safety - UL 3111-1 Listed, EN61010 Certified CAN/CSA C-22.2 No. 1010.1-92