WITE 1.83

This document contains the release notes for WITE revision 1.83 from Guzik Technical Enterprises. The highlights of revision 1.83 include:

• Support for the S-1701-A spinstand
• Support for the Guzik MR amplifier and Universal Guzik Interface
• Support for changing which heads (top/bottom) are mounted
• TAA calibration for head stacks with UP7
• Support for new head amplifiers and head stacks

All discussion of features and bugs in this document uses WITE version 1.8 as a baseline for comparison. For information about features and modifications prior to 1.8, please refer to the WITE user’s manual and to the release notes for previous revisions of WITE.

Several WITE users have requested information on the triple-track test. The triple-track test was moved from the 747 module to WITE in WITE 1.71. The detailed documentation for this test can be seen in the release notes for WITE 1.6, in which it was introduced into 747.

The new Guzik S-1701-A spinstand is supported. This spinstand offers improved mechanics for more accurate movement and faster settling time.

The new Guzik Read/Write MR amplifier and its Universal Guzik Interface are supported in WITE 1.83. The Guzik Read/Write MR amplifier provides dramatically higher bandwidth and write speeds than commercially available amplifiers.

WITE 1.83 auto-detects which TSA-style cartridges are installed when the spinstand is started. This allows testing to alternate between top and bottom.

TAA calibration with a UP7 is now independent of the UP7 attenuator setting. Changing the UP7 attenuator will cause the TAA calibration factor to be modified accordingly. UP7 users must recalibrate TAA with WITE 1.83 to obtain correct results.

Internal TAA calibration for head stacks with UP7 is supported in WITE 1.83. This can be enabled via the Configure | Test Options | Internal TAA calibration checkbox.

WITE 1.83 supports calibration of head stacks with an integrated signal injector. The integrated signal injector is selectable via the Configure | Preamp | HSA signal source option.

The following new head amplifiers are supported in WITE 1.83: M61845ES4, REGM61845GMR4, TRND61845GMR4,6 23206_3654CPOL, REGTDA5360GR, CXA3181, CXA3181_2212MR.

The following new head stacks are supported in WITE 1.83: HSA_WDREVOLUTION, HSA_VM61868, HSA_VM620212, HSA_KATANA.

The "reset pulse" operation has been implemented in the TI1611 and Guzik MR head amplifiers.

The results from the triple-track tests could not be normalized in previous versions of WITE. In WITE 1.83, these results can be normalized. Note that existing products cannot be modified to add these normalization coefficients. If you wish to normalize triple-track results using WITE 1.83, you must create the product using WITE 1.83.

Some bugs were found too late to be fixed for this release and will be fixed in a later release. This section contains all known bugs that you are likely to encounter. A bug’s presence here means that we are aware of the problem and actively working to solve it. If you encounter a problem not on this list, please report it to Guzik customer support.

After changing the product alignment parameters in WDCP (track pitch, number of tracks, etc.) WITE won’t use the updated parameter values until the current product is reloaded.

Scanning can cause system errors when too many errors are reported into the result flow.

Some DOS applications interfere with communication with Guzik hardware and can result in unstable test results. Please exit all DOS applications before running WITE.