Data Collection and Evaluation

The test object’s responses are recorded and compared with target values or defined limit ranges. Measured values Communication signals States Output signals

Typical test specimens

Functional tests are used for various electronic assemblies and systems to verify their actual functionality under defined conditions. Printed circuit boards Control units Embedded systems Communication modules Infotainment components Industrial electronics

FCT systems can be used across various phases of the product and manufacturing process. Development Prototyping Mass production Final inspection

FUNCTIONAL TEST SYSTEMS

FCT Systems

FUNCTIONAL TEST SYSTEMS

In electronics manufacturing, functional testing ensures that printed circuit boards, assemblies, or devices reliably perform their electrical and software functions. MCD Elektronik develops custom functional test systems. These systems connect to and stimulate the device under test, record and analyze measurement data, and document the results. The range extends from manual test stations to automated test systems.

FUNCTIONAL TESTS

Functional tests verify whether an electronic product actually operates as intended under defined conditions. To do this, the device under test must be controlled in a targeted manner, and its response must be reliably recorded and evaluated.

FCT Systems

FUNCTIONAL TEST SYSTEMS

Functional testing under defined conditions

During functional testing, the device under test (DUT) is stimulated with voltages, signals, commands, or load conditions. The resulting measured values, communication signals, states, or output signals are recorded and compared with target values or defined tolerance limits.

In electronics manufacturing, functional testing is used to detect faults at an early stage, before assemblies undergo further processing, are integrated into final products, or are delivered. Functional tests can be performed during development and prototype validation, as well as in series production and final inspection.

Test Principle

Target vs. Actual Comparison

Examinees

From Printed Circuit Boards to Industrial Electronics

Use

From Development to Final Inspection

TYPICAL TESTING METHODS AND CONCEPTS

Functional tests simulate defined operating conditions and evaluate the test object's responses. In this process, control, data acquisition, communication, and output signals are combined into a comprehensive functional test.

Close-up of an FCT testing system

An Overview of the MCD FCT Testing Solution

Mechanical & Electrical

Interface panel of the test system

Detailed view of the connections

LVDS, USB, Bluetooth, Wi-Fi, Ethernet, and GPS

Test fixture for multiple smart home assemblies

Top view of the test specimen

Multi-shot capture, contact, and operation monitor

RF Measurement Technology at a Test Station

Detailed View of Measurement Technology

Spectrum Analyzer and System Control

The test object is specifically subjected to the input parameters and operating conditions required for the respective function.

Voltages
Signals
Commands
Load conditions

The test object’s responses are recorded and compared with target values or defined limit ranges.

Measured values
Communication signals
States
Output signals

Functional tests are used for various electronic assemblies and systems to verify their actual functionality under defined conditions.

Printed circuit boards
Control units
Embedded systems
Communication modules
Infotainment components
Industrial electronics

FCT systems can be used across various phases of the product and manufacturing process.

Development
Prototyping
Mass production
Final inspection

Early defect detection before further processing and shipment

In electronics manufacturing, functional testing helps detect defects early on, before assemblies are processed further, installed in final products, or shipped.

Test Methods and Approaches Used

The functionality of an electronic product is tested by generating defined input parameters and operating conditions, recording the test object's responses, and then comparing them with target values or limit ranges.

Control and Simulation

Control Using Voltages

Control via Signals

Transmission of Defined Commands

Testing under defined load conditions

Measurement and Signal Acquisition

Recording of Measurement Values

Capture of Communication Signals

Recording of States

Acquisition of Output Signals

Functional Evaluation

Comparison with Target Values

Evaluation Based on Defined Threshold Ranges

Detection of Functional Errors

Testing under defined conditions

Flexible Applications

Development and Prototyping

Mass Production

Final Inspection

Testing of Various Electronic Assemblies and Systems

FREQUENTLY ASKED QUESTIONS

FAQS

A functional test is a testing procedure used to verify whether an electronic assembly, device, or system performs its intended functions correctly. To do this, defined signals, voltages, commands, or load conditions are applied, and the test subject’s responses are compared with these values.

FCT test systems are suitable for electronic, electromechanical, and mechatronic products. These include, for example, printed circuit boards, electronic assemblies, control units, embedded systems, communication modules, automotive components, and industrial electronics. The key requirement is that the product can be connected, stimulated, measured, and evaluated under defined operating conditions and has not yet been permanently installed.

A functional test specifically checks individual functions or assemblies of a product. An EOL test typically goes beyond this; it takes place at the end of the manufacturing process and combines several testing tasks into a single comprehensive process. This includes functional tests, as well as electrical measurements, mechanical testing, etc. Thus, the EOL test is, among other things, a final functional test performed at the end of the manufacturing process before shipment or.

An automated FCT is useful for recurring test procedures, higher production volumes, demanding quality requirements, or when measurement results must be documented in a reproducible manner. Automated systems reduce manual errors, shorten test times, and enable standardized quality assurance.

Test adapters serve as the mechanical and electrical interface between the test system and the device under test. They ensure reproducible contact, secure positioning, and stable measurement conditions. For printed circuit boards, special test points can be accessed using needle bed adapters; for wireless or RF applications, shielded adapters are also recommended.