The Tektronix TDS 400A Personal Lab Oscilloscopes are highly featured, portable, and easy-to-use digitizing instruments built for professionals who demand high precision and fidelity from their measurements. The series comprises the TDS 420A, TDS 430A, and TDS 460A — a choice of 2- and 4-channel models ranging from 200 MHz to 400 MHz, with a 100 MS/s sample rate on all channels, combining a broad feature set with affordable pricing.

These scopes are suited to a wide range of simple to complex applications. Listed intended uses include biophysical and biomedical research, electrophysical and electromechanical system design, audio system measurement and analysis, manufacturing test and quality control, power supply and power-related design, and product service and maintenance. With standard video trigger capability, the instruments are also well suited to measuring video signals, including NTSC, PAL, and SECAM.

ValueTronics stocks and holds its own inventory in a 20,000 sq ft secure warehouse at 1675 Cambridge Drive, Elgin, Illinois. Every pre-owned unit is inspected and functionally verified in-house before it ships, while new units ship factory-sealed exactly as received — so whichever condition you choose, the instrument comes from a source that handles the equipment directly rather than passing an order along.

Compare Other Models in This Series

The TDS 400A Personal Lab series brings together a choice of 2- and 4-channel digitizing oscilloscopes spanning 200 MHz to 400 MHz, all sharing a 100 MS/s sample rate on every channel. Across the family, Tektronix pairs excellent performance with a broad standard feature set — the TDS Graphical User Interface, standard video trigger, 25 automatic measurements, and floppy-disk storage — at affordable prices.

All three models — the TDS 420A, TDS 430A, and TDS 460A — share the same acquisition architecture, display, and interface, differing mainly in bandwidth and channel count. This lets you select the precise combination of bandwidth and channels your application requires without changing the operating experience from one model to the next.

Each model below is its own dedicated product page with condition-matched pricing. Selecting a specific model takes you to its pre-owned listing, where price and availability reflect that exact configuration and condition.

The TDS 460A is the four-channel, 400 MHz member of the series — the configuration featured on the front of the family literature. It combines the family's full 400 MHz bandwidth with four input channels, making it the most fully specified model in the lineup for multi-channel work at the top of the series' bandwidth range.

The three models differ along two axes: bandwidth and channel count. The TDS 420A is a four-channel, 200 MHz instrument; the TDS 430A is a two-channel, 400 MHz instrument; and the TDS 460A is a four-channel, 400 MHz instrument. The comparison table below sets these differences out side by side.

Every model carries the 100 MS/s sample rate on all channels, 30,000-point standard record length (120,000 with Option XL), the standard video trigger, and GPIB programmability, so the choice between them comes down to whether your work needs 200 MHz or 400 MHz of bandwidth and two or four channels.

Additional differences in specifications beyond the few shown above are not listed here — see each model's full specifications below.

Accessories Supplied

• 1 Probe Per Channel (P6138A 10X Passive Probes)
• Video Trigger
• Reference Manual (070-8035-03)
• User Manual (070-8034-03)
• Performance Verification Document (070-8721-02)
• U.S. Power Cord (161-0230-01)

Product Core & Specifications

Important: Maximum input voltage: 300 V CAT II, ±400 V peak; derate at 20 dB/decade above 1 MHz (1 MΩ or GND coupled).

Important: International power options are required on instruments and selected accessories for operation outside the U.S. For operation outside the U.S., specify a power option A1–A5 (A1 Universal Euro 220 V/50 Hz, A2 UK 240 V/50 Hz, A3 Australian 240 V/50 Hz, A4 North American 240 V/60 Hz, A5 Switzerland 220 V/50 Hz).

Usage tip: pair these scopes with the Tektronix ADA400A Analog Differential Amplifier (10 µV/div sensitivity) for precise low-level differential measurements, listed among the recommended accessories.

About this Pre-Owned unit

This pre-owned unit is inspected and functionally verified in-house before it ships and is backed by our pre-owned warranty. To confirm its exact condition, firmware revision, installed options, or included accessories for your application before ordering, contact our Test Architects.

• Warranty included
• Functional verification included
• Standard Calibration Upgrade Options: No Calibration Required, NIST Traceable, Z540.1 or ISO 17025 with Data, Z540.3 Guardbanding with Data.
• Note that unnecessary accessories may not be included (contact Test Architect to confirm).

ValueTronics supplies both new and used test and measurement equipment. New units ship factory-sealed, exactly as received from the manufacturer; every used unit is inspected and functionally verified in-house at our 20,000 sq ft secure facility in Elgin, Illinois before it ships. Our Test Architects can help you select the condition, calibration, and configuration that fit your application.

Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.