JETI / Application Story -How Jungo helps JETI in delivering robust products faster

Jeti was founded in January 1998 by three former Zeiss coworkers with the aim to develop, produce and sell spectroscopic equipment under the slogan "Economic and easy to use". The main fields of activity are optics, electronics, mechanics and software development. So JETI can offer measuring systems developed "under one roof".

Jeti GmbH developed hardware for the specbos 1000 and specbos 1100 devices, using the Philips PDUSBD12 as the USB interface circuit for the devices. They then developed the firmware for their hardware and began to search for tools to develop the PC application software and USB access.

Prior to implementing the USB standard, Jeti's spectrometers were based on the RS232 serial port communications standard. The motivation for implementing a USB interface were achieving true plug and play capabilities, fast and secure data transmission, and simple cabling. Having taken on the task of implementing USB, Jeti's engineers were unaware of the daunting task that lay ahead of them in the form of developing their applications and USB hardware access.

Jeti began development using Microsoft's DDK to develop the USB driver. However, when the project progressed slowly proving that interfacing to a USB-device was much more complicated than interfacing an RS232-driven measurement device, the chief engineer recommended commercial tools as an option. After doing market research, Jeti discovered WinDriver. WinDriver provided access to the USB-communication interface and enabled achievement of high-speed data transmission between the measurement device and the PC with the special application software.

Using the fully featured evaluation version of WinDriver, Jeti jump-started their development process, achieving an effective transmission speed of approximately 4 Mbit/sec, 40 times faster than the transmission speed achieved with the RS232 devices of 115,2 Kbit/sec. Typically, data transmission of 2 to 4 Kbytes is required. The minimum measurement time is approximately 1 ms, and bulk transfer is used for a secure transmission. (False data from transmission faults that may occur in isochronous mode would be a serious error.)