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Tektronix TDS744A Digital Oscilloscope
4 Channels, 500 MHz, up to 2 GSa/s.
Options 13, 1M, 1F & 2F Installed

Auction Includes:

Tektronix TDS744A Oscilloscope
4 x Tektronix P6138A 10x Probes
Front Cover & Accessory Pouch
All Documentation On CD

Equipment Notes:

The scope is in excellent physical and electrical condition.  It has all the bells and whistles on it.  2GS/s, 2 Gs/s, Advanced Wave Form Math Functions such as:
Advanced FFT & Color graded persistence, etc..

The scope comes with 4 x P6138A 10x Probes.  It includes all documentation on CD.  We will also include a hard copy of the programming manual. 

Installed Options:
13 - RS-232 & Centronics Hard Copy Interface (Parallel Port)
1F - 3.5mm Floppy Disk
2F - Extended Wave Form Math (FFT, Integration & Differentiation)
1M - Extended Memory Link (500k on one channel or 125k per channel evenly distributed to all channels)

Data Sheet



The TDS 744A digital oscilloscope provides the advanced signal acquisition, analysis and display functions required for making power electronics measurements.


InstaVuTM Acquisition (up to 400,000 wfms/sec)
500 MHz bandwidth
Sample rates to 2 GS/s
4 input channels
Pulse width, 1 ns glitch; runt, pattern, state, triggering
1 mV/div -10 V/div sensitivity
Infinite and variable persistence
Color Grading
Record lengths to 500,000 points
8-bit vertical resolution and up to 13 bits with HiRes
High resolution color monitor
3.5 inch DOS floppy disk drive (standard)
Vertical accuracy to 1%
Tek TriStarTM (DSP) processor
Slew Rate, Setup & Hold Violation, and Time-out triggers
Waveform pass/fail testing
Advanced signal processing functions
25 automatic measurements
Full GPIB programmability
Desktop publishing outputs
HDTV Video trigger option
Segmentable acquisition memory
VGA output

Signal Acquisition System

* Channels: 4
* Samplers: 4
* Bandwidth: 500 MHz
* Maximum Sample Rate
* 1 Channel: 2 GS/s
* 2 Channels: 1 GS/s
* 3, 4 Channels: 500 MS/s

Maximum Record Length - Standard
* 1 Channel: 50,000 pts
* 2 Channels: 50,000 pts
* 3, 4 Channels: 50,000 pts

Time Base System

* Time Bases: Main, Delayed
* Time/Division Range: 500 ps to 10 s/div

Vertical System

* Vertical Resolution: 8-bits (256 levels over 10.24 vertical divisions), >13-bits with Hi-Res, 11-bits with averaging
* Analog Bandwidth Selections: 20 MHz, 100 MHz, and full
* Input Coupling: AC, DC, or GND
* Input Impedance Selections: 1 Mohm in parallel with 10 pF, or 50 ohm (AC and DC coupling)
* Sensitivity: 1 mV to 10 V/div

Display: Monitor - 7 in. NuColor liquid crystal full-color shutter, 256 levels.

Measurement System

* Automatic Measurements: 25
* Cursors Measurements: Absolute, Delta; volts, time, frequency. NTSC IRE units and line number with video trigger option

Waveform Processing

* Waveform Functions: Interpolation (sin(x)/x or linear), Average, Envelope, Autosetup
* Advanced Waveform Functions: FFT, Integration, Differentiation, Waveform (math or acquired) Limit Testing
* Arithmetic Operations: Add, Subtract, Multiply, Divide, Invert

Hardcopy/Desktop Publishing

* Hardcopy Ports: GPIB, RS-232, Centronics
* Hardcopy Formats: Epson, ThinkJet, DeskJet, LaserJet, PostScript, TIFF, PCX, BMP, DPU 411/412, RLE, HPGL, Interleaf
* Floppy Drive: 3.5" 1.44 MB or 720 kB DOS compatible

Data Formats: MathCad and spreadsheet

Computer Interface

* GPIB (IEEE 488.2) - Full Programmability
* Auxiliary Inputs/Outputs - Video output (15-Pin VGA, full color); External Trigger input; Main and Delay Trigger outputs; CH3 Signal output


This item is sold with a 3 Day Satisfaction Guarantee.  So bid with confidence.  As our many customers will attest, we will do our very best to resolve any customer problems. But our official policy is:

This item comes with a 3 day right of return policy.
All returns must be made within 3 days of receipt.
All warranties are void if the calibration / warranty seals are broken.
Equipment must be shipped correctly and returned with all accessories.
Customer is responsible for all shipping charges on returns.
Foreign Buyers please be aware: We offer no warranty or returns on items shipped outside the USA


Payment, Shipping & Bidding:

Buyer will pay $75.00 packing and shipping in the continental United States. Payments accepted are Paypal, cashiers checks and money orders only.  No international buyers unless Paypal verified.  Please feel free to contact us if you need other arrangements.

We will make every effort to ship within 24 hours of receipt of payment. We ship with FedEx & UPS only. We will be glad to ship with other carriers using the purchasers shipping account. Please contact us to make any special shipping arrangements. For shipping rate research, our shipping address is Boulder, CO USA ---- Zip Code is 80305.

Many of our auctions have a set packaging and shipping fee.  This set fee makes the transaction easier and allows the purchaser to send payment at once without having to wait for a shipping total.  This is our best guess on an unpackaged item.  Please consider the total with shipping when you are bidding.

Foreign buyers: Unless special provisions have been made, you are responsible for making your own shipping arrangements and all costs related to customs, duties & special packaging requirements. Please do not ask us to quote you international shipping rates. Use the address information above to research you own shipping rates. You can email sales@ascentconcepts (no spam) .com to get the packaging fee, package weight and size for your research. Items sold outside the USA are sold as is.

Bidders - with no feedback or less then 80% positive feedback must contact us through the eBay email system before placing a bid. We will reply through the same system, documenting that you have been approved to bid. If you do not follow these procedures, your bid will be cancelled.  All other bidders, bid with confidence.


About Us:

Ascent Concepts and Technologies is a Research & Development Lab. As a service to the companies and institutions we work with, we broker their excess equipment & act as application specialists on their new equipment needs. We are now offering quality used equipment to the public with the same level of professionalism and service.

Please feel free to email at thomasknox@ascentconcepts (no spam) .com or call Thomas @ 1-303-554-0307 with any Technical questions. Please feel free to email at waltwhite@ascentconcepts (no spam) .com or call Walt @ 1-720-276-8288 with any Shipping or Logistical questions. We make every effort to evaluate and guarantee our equipment. Although we do not provide NIST traceable calibration, we do have extensive in house calibration equipment and make every effort to test and verify performance on equipment we sell. However we do not warranty any items shipped outside the USA.


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The equipment shown is a representation only.  We often have multiple units in stock so please email us with your needs.  We have a large inventory and can usually find any test and measurement item in a short time frame.------Inquires