HP 54659B RS-232-C / Parallel Measurement / Storage Module

HP/Agilent 54658A RS232 Measurement/Storage Module for 54600 Series Oscilloscope

HP 54657A GPIB Measurement / Storage Module

HP 54657A Measurement / Storage Module HP-IB Interface - Fair Condition

Hewlett Packard 54652A Parallel Interface Module

HP Agilent GPIB HPIB + Math + FFT module for 54600A 54600B Oscilloscope

Agilent hp 54652B rs232 interface

Keysight AGILENT N6705B DC POWER ANALYZER with 4 Modules included (see pics)