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Tektronix provides test and measurement instruments, solutions and services for the computer, semiconductor, military/aerospace, consumer electronics and education industries worldwide.
Another name for 4FSC because the pixel clock is four times the frequency of the chroma burst. For (M) NTSC the pixel clock is 14.32 MHz (4 x 3.579545 MHz), and 17.73 MHz (4 x 4.43361875 MHz) in (B, D, G, H, I) PAL systems.
Industry:Software
To move the characters of a unit of information right or left. For a binary number, this is equivalent to multiplying or dividing by two for each shift.
Industry:Software
Allows the editor to manually control the capstan speed of the selected transport + and –10% using the joystick.
TSO is especially important when tape machines need to be exactly synchronized before finalizing an edit. If audio monitors for all transports are left up, the edit point on the transport can be selected by listening for the audio echo and adjusting the transport speed until the machines are in exact synchronization.
Industry:Software
A unit of measure for complex audio signals, usually in dB. Zero VU is referenced to 1 milliwatt of power into a 600-ohm load.
The reference level of –20 dB in this program is 0 VU.
Industry:Software
A common source of image artifacts that appear as black spots on the screen, either stationary or moving around. Several things can cause pixel drop out, such as the ADC not digitizing the video correctly or pixel timing being incorrect any where in the system.
Industry:Software
Local TV broadcasters’ right to negotiate a carriage fee with local cable operators, as provided in 1992 Cable Act.
Industry:Software
A device for converting signals from one standard to another. Converting between different color schemes with the same scanning structure is called transcoding. Converting between different scanning structures requires line and field interpolation, which usually introduces artifacts. Standards conversion between 525 scanning line and 625 scanning line signals is performed regularly. Conversion from DHEP to either NTSC or a receiver-compatible ATV system will require standards conversion. It may seem that it is more difficult to convert from 1125 scanning lines to 525 than from 1050 to 525, but in a pre-filtering converter, the difference, if any, may not be large. For dealing with the field-rate difference (HDEP 60 and NTSC 59.94), some DHEP to NTSC conversions are performed by slowing the HDEP recorders to 59.94-field playback. Others are performed through standards converters that periodically omit fields.
Industry:Software
Three colored phosphor dots on the faceplate of a tri-color CRT.
Some tri-color CRTs use vertical stripes of different color phosphors or vertically oriented oblong dots. These dots or stripes are the ultimate determinants of maximum horizontal resolution. When the dots are round, they are also the maximum determinants of vertical resolution. The finer the dot pitch, the higher the resolution, since it is not possible to reduce the size of a black-and-white pixel below the size of one triad. Triad spacing also cannot be optimized for all numbers of scanning lines. Thus, a tube optimized for 1125 scanning lines will not yield optimum performance with a signal of 1050 scanning lines, or vice versa. Neither black-and-white CRTs nor the three single-color CRTs used in most projection TV sets suffer from these limitations as their faceplates are uniformly covered with a layer of phosphor; resolution is ultimately determined by the size of the electron beam and the projection optics. Picture tubes with striped apertures can deal effectively with multiple scanning rates, but still restrict horizontal resolution to the width of three stripes.
Industry:Software
A packet consists of a header followed by a number of contiguous bytes from an elementary data stream. It is a layer in the system coding syntax.
Industry:Software
The matrix and its control that select the video sources feeding each of the four quadrants of a quad split. This is a separate option on the 4100 but has been integrated into the quad split on the AVC.
Industry:Software
