Electrical termination
（重定向自SCSI terminator）
![10BASE2 cable end Terminator.](/Images/godic/202502/09/10base2_terminator2028.png")
![SCSI terminator.](/Images/godic/202502/09/SCSI-terminator-exposed-hdr-0a2028.jpg")
![Unibus terminator/bootstrap card from a PDP-11/34.](/Images/godic/202502/09/Unibus_terminator_card2028.jpg")
Electrical termination of a signal involves providing a terminator at the end of a wire or cable to prevent an RF signal from being reflected back from the end, causing interference. The terminator is placed at the end of a transmission line or daisy chain bus (such as in SCSI), designed to match AC impedance and hence minimize signal reflections.