9. Appendices

Related Tektronix Publications

Addendum -- Region Shift

Section 8 of this document describes a method for simulating jitter by convolving the data pattern with a second, slightly modified version of itself. This technique applies to the existing AWG 2000 Series products: AWG 2005, AWG 2021, and AWG 2041.

Just before press time, Tektronix announced a new feature, known as "Region Shift," for AWG 2000 Series instruments. The first product to incorporate the feature is the AWG 2021.

Region Shift allows the user to automatically modify a waveform's placement in time. The technique applies a minute amplitude shift to each point in a selected waveform region, with the net effect of making each point appear earlier or later in time relative to the unmodified pulses surrounding it. Using Region Shift, the AWG 2021 can produce jitter excursions as small as 4 ps.

 

AWG 2000 Series Arbitrary Waveform Generators

Tektronix AWG Arbitrary Waveform Generators give you the most extensive capabilities for editing waveforms, with 8 or 12 bits of vertical resolution and waveform frequencies to 500 MHz. AWGs contain a high speed, high resolution DAC with sophisticated triggering and mode settings, plus up to 4 megabytes of internal waveform memory in which to create and edit waveforms.

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You can import a waveform from a scope or disk, select one of the AWG's standard waveforms, or define your own from scratch. Using powerful built-in editing tools, you can edit the waveform right on the screen, then clock it out at rates up to 1 GS/s.

AWG 2041 AWG 2021
Clock Rate 1 GS/s 250 MS/s
Max Output
Waveform Frequency
500 MHz 125 MHz
Region Shift No Yes
Direct Waveform
Transfer from Digital
Scopes/Digitizers
TDS Series, 2000 Series,
11000 Series, DSA,
RTD 700 Series, and others
Same as AWG 2041
External Clock Clock In & Out Clock In & Out
Graphical Waveform
Editing
Draw, Timing, Table,
Equation, FFT (Opt. 09),
Digital Word/Pattern Generator (Opt. 03)
Same as AWG 2041
Max Peak-to-Peak
Amplitude into 50 ohms
2 V 5 V
Memory: Execution
per Channel
1 MB; expandable to
4 MB (Opt. 01)
256 kB per channel
Memory: Non-volatile 512 kB 512 kB
Modulation AM AM
Output Channels 1 Analog
8 ECL Digital (Opt. 03)
1 Analog
2 Analog (Opt. 02);
12 ECL Digital (Opt. 03);
24 TTL Digital (both Opt. 02 and Opt. 04)
Sine, Square, Triangle,
Ramp, DC, Pulse
Synthesized only; 10 MHz Synthesized only; 2.5 MHz
Sweep Sequencer and Equation Editor
can be used to create sweep
Same as AWG 2041
Time Base Accuracy 1 ppm 50 ppm
Vertical Resolution 8 bits 12 bits
Built-In Floppy Drive
(3½" HD PC-Compatible)
Yes Yes

 

TDS 744A Digitizing Oscilloscope

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The TDS 744A represents the next generation of digitizing scope performance. This versatile general-purpose instrument introduces Tek's new InstavuTM acquisition feature and sets a benchmark in waveform capture rate for DSOs. The TDS 744A can display more than 400,000 acquisitions per second--a rate 2,500 times faster than the most advanced DSOs available.

Other TDS 744A features include advanced triggering, graphical user interface, high-speed signal processing, complementary probing, and sophisticated documentation capability.

With its long record length and high bandwidth, the TDS 744A is an ideal complement to the 2000 Series AWGs for disk drive testing. Its feature set is also suited to applications ranging from digital system development to manufacturing test.

TDS 744A
Bandwidth 500 MHz
Input Channels 4
Sample Rate per Channel
1 channel 2 GS/s
2 channels 1 GS/s
3 or 4 channels 500 MS/s
Vertical Resolution 8 bits;
> 12 bits with Hi-Res;
11 bits with Averaging
Record Length 500 to 50,000 points per channel
Max. 500,000 points (optional)
DC Gain Sensitivity ± 1.0%
Vertical Sensitivity 1 mV to 10 V/div;
50 ohm: 1 mV to 1 V/div
Automatic Measurements 25
Triggering System Edge, Pulse (Width, 1 ns Glitch, Runt, and Slew Rate),
Logic (Pattern, State, and Setup and Hold Time Violation),
HDTV Video (optional)
Special Features InstaVu, Dual Window Zoom, FFT, Differentiation, Integration, Color Monitor, 3½" Floppy Drive