New PSC cartridge addresses the limitations of V2002 Spinstand in high-TPI Head Gimbal Assembly (HGA) and media testing. The low bandwidth of V2002 glass scale based closed loop positioning system restricts the uniformity of servo writing, making it almost impossible to write servo with high TPI heads.
Guzik introduces a new front-end to its Spinstand Models V2002 and DTR 3000, which includes new Headloader Mechanism HLM-2011, new cartridges PAC-2011, and new Universal Preampilifer UP11.
Guzik MR7 amplifier is designed for high-speed operation with RWA-2000 series.
Compared with MR5 head amplifier, it has much wider bandwidth of write and read
channels and significantly faster rise/fall time of write current
The Guzik MR Amplifier Revision 5 is a next generation of the Guzik head amplifiers.
The Guzik MR-5L read amplifier is designed to work with the high-impedance TMR heads. The impedance of such heads can be as high as 1000 Ohm, so it is impossible to achieve a high bandwidth with a high-impedance amplifier. This is the reason, why MR-5L is a current-sense low-impedance amplifier with voltage bias.
Bandwidth from DC to 6 GHz Required for frequency response measurements of high bandwidth analog
Guzik active high-impedance injector is designed for the measurements of frequency response and the calibration of the low-impedance current-sensitive head amplifiers. The injector also provides the ability to evaluate the performance of the head-amplifier heater driver. A current probe can be connected to the injector, in order to measure write current of the head amplifier.
The new generation of Guzik cartridges is equipped with Piezo actuator to achieve higher servo closed loop bandwidth. The typical bandwidth is in the range of 2–3 kHz. This allows for non-repeatable run-out reduction down to 0.35–0.60 nm (0.014–0.024 Inch) , 1. The higher servo bandwidth also improves seek time, which leads to test time improvement for several tests.
Automated Protective Cover and Disk Shroud: Improves the repeatability and the accuracy of HGA testing results. Protects media and operator while changing HGA cartridges without stopping spindle. Covers media to protect it while spinstand is not in use. Automated disk shroud movement eliminates the need to manually release, move, and lock the disk stabilizer shroud