All electronics devices have to be put to test before they are dispatched for sale or put to regular use. If the equipment fails in the test the errors are either rectified or in other cases, the device is disposed of. So test equipment is a device that is used to create a signals and capture responses. If the signals aren’t favorable, then corrective measures have to be taken. This way the quality of the electronic device is ensured before they are put to use at a large scale. The test equipment can also be used to find out if a device which was working well suddenly stop for no reason or functions abnormally. Once the error is detected, they can be rectified, with no further interruption.
A large number of testing tools are available to check the quality of an electronic device. These types of equipment are broadly classified into Basic Equipment and Advanced Equipment. Lets us discuss in detail what these types are.
The Basic Equipment that is used on the circuit under test are further classified under the following heads:
- Response and
- Test Probes
The tools that are used for basic measurement of voltage, current, and components in the circuit are Voltmeter that helps to measure voltage, Ohmmeter that quantifies the resistance, Ammeter to measure current. In other instances, a Multimeter can replace all the other tools that are mentioned above.
The next is to judge the stimulus of the circuit under test, and the test tools used in this process are Signal Generator, Digital Pattern Generator, and Pulse Generator. A Signal Generator is a tool that is commonly used to generate signals in a circuit and analyze if the outcome is favorable. A Digital Pattern Generator is employed as a test tool or at times even as software to generate digital electronic stimuli that correspond to two logic states while Pulse Generators are primarily used for working with digital circuits and analog circuits.
Once you have triggered and captured the signals from the circuit under test, the next is to analyze these responses to get to a conclusion. This will help the person understand where the circuit went wrong and what has to done to rectify it. The tools used here are Oscilloscope that displays the changes that happen over time and a Frequency counter to measure the corresponding frequency.
Finally, when you get the above things done separately, the next step is to connect them. A test probe is a device that connects the test tool and the device under test, to achieve the desired results.
The tools that come under the Advanced Equipment category are not so commonly used. Under the advanced equipment category, you will again have a range of meters, probes, analyzers, and signal generating devices. In most of the cases, your job gets done with the basic equipment. If the device under test keeps failing, you will have to finally resort to the advanced equipment.