DDA260 Disk Drive Analyzer

DDA 260 
Specifications

 

Signal Capture
Bandwidth (-3 dB)  @ 50 ?: DC to 2 GHz * ; @ 1 M?: Bandwidth depends on probe used 
Number of Channels 4
Sample Rate and Acquisition Memory See table below
Active Channels  Max Sampling Rate  Max Record Length
4 GS/s  16 M
8 GS/s  32 M
16 GS/s  64 M 
Sensitivity  50 ?: 1mV - 1 V/div fully variable; 1 M?, 1mV - 2 V/div fully variable 
Scale Factors 
Choice of over 12 probe attenuation factors selectable via front-panel menus
Offset Range 
50? or 1 M?: 1 mV - 4.99 mV/div: +400 mV
50?: 5 mV - 99 mV/div: +1 V; 0.1 - 1V/div: +10 V
1M? : 5 mV - 100 mV/div: +1 V; 0.101 V - 2 V/div: +20 V
DC Accuracy  (±) 2.0% full scale + 1.5% offset value @ gain >10mV
Vertical Resolution  8 bits, up to 11 bits with enhanced resolution (ERES)
Bandwidth Limiters  20 MHz, 200 MHz
Input Coupling  1M?: AC, DC, GND,; 50?: DC, GND
Input Impedance  50 ? ±1.5%; 10 M? // 11 pF typical (using PP005 probe)
Max Input Voltage 
50 ?: ±5 V DC (500 mW) or 5 vrms; 1 M?: 100 Vmax (peak AC <5 kHz + DC) 

Acquisition Modes
Random Interleaved Sampling (RIS)  50 GS/s. For repetitive signals from 200 ps/div – 1 µs/div
Single-Shot  For transient and repetitive signals from 200 ps/div – 1000 s/div
Sequence 
Stores multiple events — each of them time stamped (1 ns resolution) — in segmented acquisition memories
Sequence Mode Dead Time  Typically 30 µs
Number of Segments Available  2 – 8000

Timebase System
Timebases  Main and up to four zoom traces 
Time/Div Range  200 ps/div – 1000 s/div 

Rapid Signal Processing
Microprocessor  Motorola PowerPC 603e
System Memory Configuration  256 Mbytes
Video Memory  1 Mbyte
Persistence Data Map Memory  16 bits per displayed pixel (64k levels)
Waveform Processing 
Up to four processing functions can be performed simultaneously. Functions available are: Add, Subtract, Multiply, Divide, Negate, Identity, Summation Averaging, Sine x/x, Integral, Derivative, Square Root, Ratio, Absolute Value, Resample (deskew), Rescale Exp Log, and the advanced functions listed below
Average 
Summation: Up to 106 averages possible. Continuous: Weighting factors from 1:1 to 1:1023
Extrema  Roof, Floor, or Envelope values from 1 to 106 sweeps
ERES 
Low Pass digital filters provide up to 11-bit vertical resolution. Sampled data is always available, even when a trace is turned off.
FFT  Spectral analysis with five windowing functions (Rectangular, Von Hann, Hamming, Flat Top, Blackman-Harris) and FFT averaging
Statistical Diagnostics 
The parameter analysis package permits in-depth diagnostics on waveform parameters. Live histogramming and trending of any waveform parameter measurement is possible. The histogram can be autoscaled to display the center and width of the distribution. 
Histogramming  Generate history of waveform parameter calculations. 
Trending  Generate trend sequence of waveform parameter calculations.
Correlation 
Calculate the normalized correlation coefficient between two signals.
* for sampling rates > 4 GS/s

 

Copyright © LeCroy Corporation 2008