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Television engineering has undergone dramatic changes in recent years. In the past, all equipment was analog. That meant a different piece of hardware had to be built to do each type of conversion or process to the TV signal. That equipment then had to be adjusted, aligned and repaired on a regular basis. Early TV cameras had over 100 knobs inside that had to be adjusted before each shoot! All this reguired lots of people, tools and spare parts. Computers are changing all that.
Now, TV is going digital. This means the picture is converted into a computer code in the camera or some other point. Then a computer can do all the processing and special effects. Rather than build hardware to to a special function, a computer program can be written to do the same thing.
Currently, there is still a lot of analog or mixed type equipment in use. One example is the video tape recorder. They all have several digital processors inside for control, but most still record an analog signal on tape. D1and D2 VCR's record a digital signal on tape. Even they require a lot of analog type adjustments to work correctly. Computer memory chips and hard disk drive memory are still to expensive for general video storage.
Engineers still use the traditional engineering tools but now they must also use computer and network tools. These are for computer workstation hardware, networking and even software engineering. Even the tools themselves have "Program it yourself" features. Below are some of the tools in use today. Please add your engineering tools. Contact PRO TV.
The most basic measuring tool. It measures electrical force and resistance to that force. Most meters also measure current which is the amount of electrical energy. The VOM is used to see if the equipment is getting the right amount of electricity through each component.
The o-scope displays changes of voltage over time. In TV, the signal has more or less voltage at certain times. The display of this looks like a wave on a TV screen. The shape of this wave is compared with a sample or lines on a grid painted on the screen. The equipment is adjusted to make the waveform appear correct.
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