The **MSO2CM** refers to the **2-Series MSO (Mixed Signal Oscilloscope) Battery/CMA (Carry Mount Accessory) Package** from Tektronix. It is specifically designed for the **MSO22** and **MSO24** portable oscilloscopes. The "electronic parts" of this specific SKU (MSO2CM) primarily concern the **Battery Management System (BMS)** and the power distribution components required to turn the benchtop scope into a field-portable unit. --- ### 1. Core Electronic Components of the MSO2CM The MSO2CM is not a single component but a kit that adds two battery slots and a mounting frame to the oscilloscope. | Component | Description | Electronic Function | | :--- | :--- | :--- | | **Battery Slots (Dual)** | Two slots for Lithium-Ion batteries. | Provides DC power rails to the mainboard. | | **BMS Circuitry** | Internal Battery Management System. | Handles cell balancing, overcharge protection, and temperature monitoring. | | **Hot-Swap Controller** | Power switching logic. | Allows the scope to switch between AC power and Battery (or between Battery 1 and 2) without rebooting. | | **LED Indicators** | Front-facing status lights. | Visual feedback for charge levels and power state. | --- ### 2. Technical Specifications When the MSO2CM components are installed, the power architecture of the oscilloscope changes to support DC input. * **Battery Chemistry:** Lithium-Ion. * **Operating Time:** Approximately **8 hours** with two batteries installed. * **Charging Mechanism:** The scope charges the batteries internally when connected to the AC adapter (18V DC input). * **Communication Interface:** The batteries communicate with the scope's CPU via the **SMBus/I2C protocol** to report precise "Time to Empty" and "Cycle Count." --- ### 3. Block Diagram Logic The electronics inside the MSO2CM interface with the MSO24/MSO22 mainboard as follows: ```mermaid graph LR AC_Adapter[AC Power Adapter] --> Power_Mux{Power Mux/Logic} Bat1[Battery Slot 1] --> Power_Mux Bat2[Battery Slot 2] --> Power_Mux Power_Mux --> DC_DC_Converter[DC-DC Step Down] DC_DC_Converter --> Main_Processor[MSO CPU & FPGA] ``` --- ### 4. Installation & Compatibility The MSO2CM is essential for field engineers because the standard MSO2 series does not come with internal battery capability. * **Compatible Models:** MSO22 (2 Channels), MSO24 (4 Channels). * **Form Factor:** The "CMA" part stands for **Carry Mount Accessory**, which includes the physical housing (protective rubber boots and handle) that protects the electronic connectors of the batteries. ---