描述
所有模块都固定在底板上。如德维森公司的PPC11、PPC22和PPC31系列PLC，OMRON公司的C200Ha机，CV2000等中、大型机就是这种结构。它比较牢固，但底板的槽数是固定的，如3、5、8、10槽等等。槽数与实际的模块数不一定相等，配置时难免有空槽。这既浪费，又多占空间，还得占空单元把多余的槽作填补。
Wavetek 20 2MHz Function Generator
WAVETEK MODEL 8501 PEAK POWER METER
WAVETEK CELLULAR TEST SYSTEM MODEL 3600D
Wavetek 8501 Peak Power Meter
DISPLAY MODULE JDSU ACTERNA WAVETEK STEALTH 3SR SDA5000
SDA 5000 HD Battery JDSU Acterna Wavetek Stealth Meter
WAVETEK 1038-N10 Network Analyzer w/ display
Wavetek Model 404, Test Set Data Transmission
JDSU ACTERNA WAVETEK SAM-4040D TO SDA-4040D UPGRADE
WAVETEK MODEL 3600D, CELLULAR TEST SYSTEM
Wavetek Model 111 Voltage Controlled Generator
WAVETEK MICRO STEALTH MS-1000 CABLE SIGNAL LEVEL METER
LOT (10)Wavetek Meterman PM55 Auto Precision Multimeter
Wavetek 15176 Balanced Detector New! (Reduced!)
