Specifications

WITE32 Release Notes Version 3.20
CHAPTER 6
KNOWN ISSUES
6.1 Servo-3 RWA and Servo-2 Spinstand Incompatibility Notification
WITE32 version 3.20 does not support a combination of Servo-3 RWA and Servo-2 spinstand. The following
error message is displayed if WITE32 software detects such configuration: "Servo-2 spinstand and Servo-3 RWA
are incompatible. Please, contact Guzik technical support".
6.2 Perpendicular Recording Module Limitation
The only programmable differentiator (P/N 315000) available for RWA-2550/2585 families of testers has the
amplitude response, which is different from the response described in Chapter 3 of "WITE32 Perpendicular
Parametric Measurements Test Description Engineer's Reference". Consequently, the Differentiator
Optimization test from the Perpendicular Parametric Measurements test package will produce wrong results if
run with such filter. Note that if the cutoff frequency for such filter is set manually, then other Guzik tests, such
as PWN measurement and PRML tests can still be applied for perpendicular recording using this filter. As a
workaround for not using the Differentiator Optimization test, we suggest to always select the maximum cutoff
frequency (400 MHz) for this model of programmable differentiator (P/N 315000).
6.3 A False Error Message on Updating RWARSLT.MDB
If there is no record in the RWARSLT.MDB table, an error message “Object variable or block variable not set”
may pop up on the database updating. It is safe to press the Ignore button. The database is upgraded correctly.
6.4 Filter Selection for the XY Alignment Test for Perpendicular Systems
In the case of perpendicular recording systems, you have to select a programmable differentiator as a system
filter (in the Control | Filter dialog box) before running the XY Alignment test. Otherwise a misleading message
“The measured optimal servo frequency (value1) is lower than minimal frequency (value2). Please, check the
"Head Bandwidth" setting in the "Servo Control" dialog box.” may pop up, and the test is interrupted.
64 Guzik Technical Enterprises