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You may have seen oscilloscopes before without being aware of it – they are usually these boxes that are fitted with a display screen on which a grid pattern can be seen by which the signals being measured can be gauged properly. The grid is formally called a “graticule” and every square in the graticule is dubbed a ‘division”. Your oscilloscope box will also have a front panel on which different control buttons and knobs appear, along with various input connectors.

Oscilloscopes qualify as electronic test instruments that can identify and display signal voltages, so that a technician can examine the display screen and note down the data. The simplest of oscilloscopes will feature the horizontal line labeled the “trace” on the graticule display screen that travels in a left-to-right fashion across the screen. Basically, the “trace” will be able to who how voltage is measured over time. As the trace travels from left to right, the older data about voltage will be located on the left side of the screen and the newer data can be found towards the right.

These simple kind of oscilloscopes can be adjusted using the “timebase control” which will determine at what speed the “trace” will be indicated based on seconds per division. The “vertical control” will indicate the exact scale of the vertical deflection of the “trace” (meaning, how far the “trace” moves upward or downward across the graticule) based on volts per division.
The problem with oscilloscopes is that their timebase might not be so precise, while the input signals could be unstable as well, so measuring the “trace” can tend to be hard.

That is why the more up-to-date oscilloscopes now use the “saddle” function – this allows oscilloscopes to halt shortly before the “trace” is to terminate at the right side of the graticule display screen. Oscilloscopes of this sort will be triggered to initiate a new trace if an expected “event” happens, such as when the input waveform gets to a pre-determined threshold voltage going either upward or going downward. Oscilloscopes are fitted with the “saddle” function to prevent the usual horizontal drift that older oscilloscopes experienced with their “trace”.

In the past, oscilloscopes were just analog measuring instruments, but now these analog oscilloscopes have been rendered obsolete with the arrival of modern digital oscilloscopes. But in some cases, analog oscilloscopes are still being used nowadays, like for gadgets using low bandwidth in the <60 Mhz range.
The most common function of oscilloscopes is to gauge whether electronic gadgets are malfunctioning or not. Oscilloscopes are very useful this way because a technician can see signals as represented on the graph or graticule. If the device is malfunctioning, then the technician can progress to identifying the component within the electronic gadget is on the fritz.

If you are looking for samples of the old analog oscilloscopes, then you can try checking sites like websites that hold auctions online, for any used test equipment that have been offered for sale.

http://www.testwall.com offer a wide selection of Oscilloscope, Spectrum Analyser, Network Analyser, Logic Analyser, Signal Generator, used test equipment and more.

Article Source: ArticlesBase.com - The Use of Oscilloscopes