Today, about 95% of all digital cameras use CMOS image sensors with the rest employing CCDs. From the standpoint of sensor outputs, the main difference between CMOS and CCD sensors is that each pixel in a CMOS sensor has its own readout circuit next to the photosensitive area. In CCDs, charge collected in individual pixels […]
Setting input parameters in the Tektronix MDO3000 oscilloscope
Input parameters in the Tektronix MDO3000 Series Oscilloscope are determined by the user. This is done by pressing one or more of the channel menu buttons, causing the horizontal channel menu to appear. Menu items are: • Scale – Fine, Offset, Position, Probe setup and Deskew • Coupling – ac or dc • Termination – […]
Basics of flat screens in test equipment
Flat-screen technology has become ubiquitous. It has almost completely replaced CRTs in test instruments as well as in other appliances. Unfortunately, flat-screen tech can be a bit confusing because of vendors that use their own trade names to refer to their specific type of flat display technology. Here, we’ll try to clear up some of […]
The rise, fall, and modern uses of CRT technology
A few decades ago, virtually all computer monitors, radar installations, TVs and oscilloscopes employed cathode ray tubes for the user’s visual interface. Today, except for a few educational models and replacements for radar installations, CRTs aren’t used as displays. (CRT material and process technologies are still common in the vacuum tube industry as a whole […]
Displaying digital data in the MDO3000 Series oscilloscope
An application module lets the Tektronix MDO3000 Series oscilloscope decode and trigger on any of the principal serial bus types. For a parallel bus, the MDO3MSO option is required. Serial bus types include Audio, CAN, LIN, FlexRay, I2C, SPI, MIL-STD-1553, RS-232, RS-422, RS-485 and UART. Digital data, serial or parallel, can be entered into B1 […]
The system of menus in the Tektronix MDO3000 Series oscilloscope
New users are invariably challenged by the large number of front-panel controls and extensive menu trees found on modern scopes. Many menu items have single-word designations, which only begin to describe their extensive functions. In on-screen menus, specific display modes are not always where you expect to find them. Learning the layout of this architecture […]
Displaying waveforms and trace data in the Tektronix MDO3000 Series oscilloscope
When you are trying to get an accurate idea of waveform qualities from a scope display, the display settings are quite important. So it can be helpful to review the setup process in widely used scopes such as a Tektronix MDO3000. Display style and persistence in this instrument can be accessed by pressing the Acquire […]
Bandwidth basics and fundamentals
Bandwidth has a variety of meanings in different contexts. In signal processing, it is the difference in frequency (Hertz) between the upper and lower limits in a continuous frequency band. In instrumentation, such as an oscilloscope, it is the range of frequencies above 0 Hz in which the instrument exhibits a specified level of performance. […]
Differences between stand-alone and scope-based spectrum analyzers
Most oscilloscope manufacturers also offer an extensive line of spectrum analyzers. There are similarities as well as differences between these two distinct instruments. The oscilloscope is optimized to display signals in the time domain, its default mode. Additionally, pressing Math>FFT, the same signal appears in the frequency domain. In the Tektronix MDO (mixed domain oscilloscope), […]
The ups and downs of oscillators in test equipment
Examine the low-frequency signal source in many kinds of test equipment and you are likely to find a harmonic oscillator. A harmonic oscillator typically consists of an amplifier that gets its input from its own output. A part of the output feeds back to input while the rest is an output signal. To support oscillations, […]
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