描述
信号在长线中传输会遇到三个问题：一是高速变化的信号在长线中传输时出现的波反射现象，二是具有信号延时，三是长线传输会遇到外界干扰。
Pacific Scientific Servo Drive Controller SC320
Pacific Scientific 1/2HP Gearhead PMDC Brushed DC Motor
Pacific Scientific Indexer/ Drive Model: 5240
Pacific Scientific SC723B001 Servo Drive
Pacific Scientific SIGMAX Step Motor E21SCHT (3805)
PACIFIC SCIENTIFIC PC834-107-N BRUSHLESS SERVO DRIVE
Pacific Scientific Controller Module/Stepper Drive 5310
PACIFIC SCIENTIFIC SC753A001-01 SERVO DRIVE ***XLNT***
Lot of 3 Pacific Scientific 5410-002 Micro Step Drive
Lot of 3 Pacific Scientific 5410-002 Micro Step Drive
Pacific Scientific PC832-001-T PC832001T Servo Drive
PACIFIC SCIENTIFIC SC905-001-01 SERVO DRIVE *NICE*
