• Build 3D and 2D plots of individual magnetic transitions
• Along-the-track sampling period 0.1 ns (2 nm at 7200 RPM, MD location)
• Cross-track accuracy 0.4 nm (1 sigma) with Guzik servo*
• Non-destructive measurements
• Less than 20 seconds scan time for the area 10 µm per 10 µm (step 12 nm)
• Compatible with perpendicular and longitudinal products

The 3D Pulse Profile Test allows you to capture data from the magnetic media and plot as a three-dimensional plot of read-back signal amplitude versus off-track offset and along-the-track direction. The acquisition is performed using Guzik D5000 analyzer with data acquisition rate up to 10 Gsample/sec (0.1 nsec sampling resolution). Off-track positioning is performed using Guzik servo with 0.01 nm resolution and 0.4 nm accuracy, 1 sigma*. The read-back amplitude can be shown on two-dimensional and/or three-dimensional plots, with or without averaging. The captured data can be exported to a file, such that you can design your own algorithms of data processing and representation.

The Guzik 3D Pulse Profile test is non-destructive - you do not have to remove media from the spinstand, and/or provide special marking before measurements. You can write a different pattern, vary write current, change other parameters, and perform measurements on the same area of the media. The test takes less than 20 seconds when scanning the area 10 µm per 10 µm with the step 12 nm.

With the test you can analyze servo and data patterns previously written, or pre-printed on the media, as well as write and read a pattern using Guzik RWA-2000 series.

Figure 1 shows a fragment of a drive servo captured by the 3D Pulse Profile Test. The media was taken from a drive purchased through a retail store, and placed on a Guzik V2002 spinsand. The following is the description of the drive used for this measurement:

• Drive Manufacturer: SEAGATE
• Model: Momentus 5400.3, ST9160821A
• S/N: 5MA0VSLM
• Technology: Perpendicular Recording
• Form factor, RPM: 2.5", 5400 RPM

Figure 1: Drive Servo

Figure 2 shows low-frequency pattern written on the perpendicular media. This 10-MHz pattern was written using Guzik RWA-2000 series, and then read and processed by the 3D Pulse Profile test. Red color indicates positive transitions, blue color indicates negative transitions.

Figure 2: Perpendicular Transitions, 10-MHz Pattern

Figure 3 shows the same low-frequency perpendicular transitions, displayed as a three-dimensional plot.

Figure 3: Perpendicular Transitions, 10-MHz Pattern, 3D View

Requirements

The 3D Pulse Profile test is an optional purchase software, which requires the following:

1. Guzik RWA-2000 series
2. Guzik D5000 Signal Analyzer
3. WITE32 Revision 4.00 or later
4. Software license. Please contact sales@guzik.com to obtain a quotation for the license.

Note: It is recommended that your RWA is equipped with Servo Revision 3 or later.

Note: Guzik V2000 Spinstand is recommended to provide Index Skew control, in order to study patterns pre-written or pre-printed on the media.

* You must have a Servo-3 or Servo-4 system to achieve this accuracy.

Specifications are subject to change without notice