Digital DASM II Overview

A DASM (Data Acquisition System Manager) may be used as the interface between the host computer and the laser camera. The current CT system is capable of using only a “digital” DASM to perform this function (older system's supported the use of an analog DASM).

The “digital” DASM connects the host’s SCSI port to the laser camera’s control and image data ports. It attaches to the laser imager using separate data and control cables from the Digital Data Output and Camera Control Interface of the DASM to the corresponding inputs of the laser imager.

The Digital Data Output of the digital DASM conforms to all laser camera copper connections. The DASM’s Digital Data Output has RS-485 line drivers and receivers and can be connected up to 250 feet from the laser imager, if the proper cabling is used. This distance can be extended up to 1,000 feet with a SCSI to fiber optic converter.

The DASM’s digital control output accommodates standard RS-232 and RS-422 serial port connections to the laser imager. Digital control can be used at up to 9600 baud.