What types of terminators are there?
We all know (or maybe not 😉 that for things to work flawlessly in a SCSI chain/bus we must have our first and last devices on the chain terminated properly; cool we say, but WHY? Well as you know, the SCSI standard allows us to connect contemporarily various different types of devices (HDs, Scanners, Printers, Samplers, CD-ROMs, MO, Zip Drives etc…) all on one single bus. This potentially means ‘long’ distances that can reach up to more than 5 meters of connection cable for the SCSI-1 standard and this means variable resistivity and thus signal drop and electromagnetical interference caused by external equipment (like monitors) and most important of all SIGNAL REFLECTION due to the distance which all ends up in data instability along the bus. With all these parameters in mind, there had to be a way to keep the signal clean or at least the cleanest possible along the bus and so the termination tecnique was adopted. Among the SCSI bus signals there is also one called Termination Power
