14 WM-OM-E Rev I
Obstacles that Can Be Overcome Using the DDA’s Channel Analysis................................ 349
What Channel Analysis Provides.......................................................................................... 350
Channel Emulation................................................................................................................350
With or Without Reference.................................................................................................... 351
Stop On SAM ........................................................................................................................ 352
Analog Compare ................................................................................................................... 352
Measure’s Drive Parameters ................................................................................................ 354
Setting Up Channel Emulation .................................................................................. 354
Drive Analysis Setup............................................................................................................. 354
Channel Setup ...................................................................................................................... 356
Setting Up Analog Compare...................................................................................... 358
Drive Analysis Setup............................................................................................................. 358
Channel Setup ...................................................................................................................... 359
Setting Up Noise Analysis ......................................................................................... 359
Setting Up Disk Triggers ........................................................................................... 361
Read Gate............................................................................................................................. 361
Sector Pulse.......................................................................................................................... 361
Servo Gate............................................................................................................................ 362
Setting Up Zoom ....................................................................................................... 363
DDA REFERENCE INFORMATION.................................................................364
Channel Analysis Concepts....................................................................................... 364
Using the DDA's Equalization Filter...................................................................................... 364
Selecting the Waveform Section to Be Analyzed ................................................................. 365
DDA Markers ........................................................................................................................367
Setting Up to Use Drive Channel Analysis ................................................................ 367
Which Signals to Provide ...................................................................................................... 367
Choosing the Waveform Section to Be Analyzed................................................................. 367
Selecting the Reference Waveform ...................................................................................... 368
Time/Div Settings..................................................................................................................369
Automatically Shown Traces................................................................................................. 370
Setting Bit Cell Time ............................................................................................................. 370
Retraining the Filter...............................................................................................................370
Choosing an Analysis Method................................................................................... 370
Analog Compare ................................................................................................................... 371
Channel Emulation without Reference ................................................................................. 371
Channel Emulation with Reference ......................................................................................371
Channel Emulation without Reference ...................................................................... 372