1

InstaVu, DPO, 3rd Gen DPX

2

Agenda

Evolution ART, InstaVu, DPO, 3rd gen DPX

3rd gen DPX comparison to Xstream and MegaZoom

Lab: Demonstrate 3rd gen DPX throughput advantages for troubleshooting, measurements and tests vs. Xstream and MegaZoom.

3

Evolution of Oscilloscopes

MarketDrivers

Customer Challenges

DSO1980 1998

ART

1950

• Military• Vacuum tube

technology• Emerging solid

state technology• Broadcast video

• Device characterization

• Signal edges and waveshapes

• Computers• LSI• Digital data• Mixed signal

environments• Faster

microprocessor clock rates

• System integration• Quality assurance

• Signal data• High-frequency

effects• Documentation

• Convergence• Interoperability• Faster data rates

and microprocessor clocks

• Complex signals• Standards compliance• Test equipment

performance

Scope Technology DPO

4

Analog Oscilloscope

Benefits Direct visual impression of actual

signal behavior Intensity grading (frequency of

occurrence information) No quantizing error or aliasing Very fast waveform capture rate

Shortcomings Purely visual information Blink and miss Limited bandwidth

performance Edge triggering No pre-trigger information Optimized for single channel

operation Limited writing speed for low

repetition rate signals

5

Transition from ART to DSO Waveform Capture RateIs Limited By Holdoff Time

DSO Cycle

ART CycleDisplayed Sweep

Sweep Holdoff Time

Typical Capture Rate Range

Maximum Capture Rate

1 - 100 Hz

7104 Analog scope 400k/sec

Acquire New Signal

System Holdoff Time

Process Signal Update Display

6

1995 TDS784 InstaVu – The 1st Generation

Benefits First scope to achieve the

bandwidth and waveform capture rate of the world’s fastest analog scope the 7104

Shortcomings Max InstaVu sample rate 1GS/s E.T. Waveform image depth 1bit

No gray scale, only persistence Measurement rate 30/sec

Conventional measurement made on a single waveform

InstaVu records 500pts DSO records 0.5Mpts

7

Analog Real-Time

InstaVu

Digital Storage

1995 InstaVu First Generation Waveform Capture Rate

8

The Challenges

Dynamic-Complex Signals May contain multiple modulation types including frequency,

phase, amplitude, and/or noise Reside in new dense signal environments May contain:

Complex modulated RF Jitter Glitches Cross Talk Contention

9

1998 The Second Generation

A new oscilloscope technologythat stores, displays, and analyzes

dynamic-complex signalsin real time.

10

1998 A Breakthrough SolutionThe Digital Phosphor Oscilloscope

Digital Phosphor OscilloscopeAn instrument that digitizes electrical signals and displays, stores, and analyzes three dimensions of signal information in real time.

DPO Amp A/D Display

uP

DPXWaveform ImagingProcessor

ParallelProcessing

Acqui-sition

Rasterizer

DigitalPhosphor

DisplayMemory

11

1998 Compare the Architectures

DSO

DPO

Amp DeMUXAcqui-sition

MemoryuP Display

MemoryA/D Display

Amp A/D Display

uP

DPXWaveform ImagingProcessor

SerialProcessing

ParallelProcessing

ARTAnalogDisplay

X

YZ

Horiz Sweep

VertAmp

DelayLine

Trigger

DisplayAmp

Acqui-sition

Rasterizer

DigitalPhosphor

DisplayMemory

12

1998 Tektronix TDS784D DPO, Technology Enhanced by DPX™

DPX is a Tektronix proprietary waveform imaging processor that creates and manages the real-time intensity grading

Each channel has its own DPX Waveform Imaging Processor

DPX is a 13 mm2 die using 0.65µ CMOS Technology and 1.3 million transistors

DPX provides 24,000,000,000 read-modify-write operations (RMW) per second

13

1998 TDS784D DPO – The 2nd Generation

Benefits 2GHz bandwidth with 400,000

acquisitions/second Waveform image depth 22 bits Gray scale in DPO DPO record length up to 0.5Meg Z axis modulation

Shortcomings Max DPO sample rate 1GS/s Measurement rate 30/sec

Conventional measurement made on a single waveform

Min/max compression 8Meg records required E.A.L mode

14

DPO Is Not A Persistence Mode

DPOs provide intensity grading, in real-time, as part of the acquisition system Limited only by acquisition (trigger) rate Provides intensity graded display information on dynamic signals Captures dynamic signal variations, in real-time, enabling the user to see actual signal behavior Rapidly builds a statistical representation of actual signal behavior

Analog DSO Persistence DPO

Persistence modes can create intensity grading in the display system by using normally acquired waveforms and post processing Limited by the DSOs capture rate Lacks real time feedback May miss intermittent events Limited in actual distribution of events information

15

The Challenges

Extend the ability to examine Dynamic complex signals to the data rates and time windows required for today’s computer and communications

Measurement and test throughput

16

DPO ParallelProcessing

Amp A/D Display

Windows processor

Acqui-sition

Rasterizer

DigitalPhosphor

Display &MeasureMemory

DSP &Measure

Fast 64 bit Measurements with Statistics

“Measurement throughput to match waveform throughput”

Today: 3rd Generation DPX

Digital Phosphor OscilloscopeAn instrument that digitizes electrical signals and displays, stores, and analyzes three dimensions of signal information in real time.

17

Today: TDS7000 3rd Generation DPX

Benefits 4GHz bandwidth with 400,000

acquisitions/second Waveform image depth 64 bits Gray scale record view

compression View entire record

Fast Acq record length up to 1Meg WfmDB sample rate 20GS/s ET

Real sample every 50ps after trigger

Fast waveform data base measurements

Amp A/D Display

Window’s processor

Acqui-sition

Rasterizer

DigitalPhosphor

Display &MeasureMemory

DSP &Measure

18

Still the leader Waveform Capture Rate Including Infiniium MegaZoom and WaveMaster Xstream

Waveform Capture Rate(Waveforms/Second)

Sweep Speed (Log Scale)5 ms/div 500 ps/div0.1

1

10

100

1000

10000

100000

1000000

Infiniium 54855 6GHz140 Waveforms/Sec

MegaZoom

TDS7000 3rd gen DPX >400,000 waveforms/Sec

TDS3000B with DPOAcquisition >3500 Waveforms/Sec

LeCroy WaveMaster 8600 with APO+Segmented Mem1000 waveforms/Sec, best case

Xstream

19

LeCroy says in the press:

“LeCroy claims that WaveMaster, in segmented memory mode, betters by

50% the 400,000 waveforms/sec of Tektronix’s fastest DPO displays”

Source: Smart Scopes, EDN magazine,Dan Straussberg, March7, 2002

20

Today: LeCroy with Xstream

Sequence Mode

60 sec @ 1us/div

Xstream is no match for DPO

21

Today Tektronix 3rd Gen DPX

FastAq Mode

60 sec @ 1us/div

DPO is hundreds of times faster than Xstream for troubleshooting

22

LeCroy fud in the press:

“2.5Gb/s eye diagram using LA Techniques LA19-01-01 producing PRBS data stream. LeCroy using SDM software

option in mask test mode.”

Throughput ratio: LeCroy/Tektronix=651

Source: Scopes trial, EDN magazine,Dan Straussberg, March 6, 2003

23

Xstream Mask Testing – SDA6000

20GS/s dots

Mask testing

measurements

Clock recovery

Sequential acquisition

1400 UI/min

24

Xstream Mask Testing – SDA6000

Avoid “traditional” it is even slower

25

3rd Gen DPX Mask Testing TDS7404

20GS/s dots

Mask testing with measurements

Clock recovery

Wfmdb acquisition

483,000 UI/minute

350X fasterthan SDA (4000X faster in fast acq at 1.25GS/s)

26

Infiniium 54853, 54854 and 54855

Waveform throughput limited to about 100/sec Poor choice for troubleshooting or analyzing complex

waveforms Midrange Infiniiums are faster than WaveMaster

No support for serial data testing today. Agilent certainly knows how to do this on DCA.

27

Summary: InstaVu, DPO, 3rd Gen DPX

Significant advances with each generation of fast acquisition.

Xstream or MegaZoom cannot match our waveform throughput for troubleshooting or analyzing complex waveforms.

3rd generation DPX’s combination of 20GS/s precision, fast throughput and 64 bit data base measurements exceed SDA or Infiniium by a wide margin.

Hands on labs with the competitor’s products to see for yourself.

28

Knowledge Review

3rd gen DPX’s Waveform Data Base is acquired at 1GS/s, 1.5GS/s, 20GS/s?

Xstream is 100X, 1X, .003X faster than 3rd Gen DPX for troubleshooting?

SDA with Xstream is 100X, 1X, 0.003X faster for mask and compliance tests on fast serial data?

MegaZoom is more likely, about same, less likely to be able to identify and measure distribution of occurrence information?