vectorscope การใช้

• A waveform monitor is often used in conjunction with a vectorscope.
• In some vectorscope models, only one set of bar targets is provided.
• New functionality includes a waveform monitor and vectorscope.
• A "'vectorscope "'is a special type of oscilloscope used in both audio and video applications.
• The actual color burst signal shows up on the vectorscope as a straight line pointing to the left from the center of the graticule.
• Most modern waveform monitors include vectorscope functionality built in; and many allow the two modes to be displayed side-by-side.
• Design engineers used PDGS for auto body design, and finite element analysis using NASTRAN . It used a vectorscope from Lundy for a display.
• When he needs to evaluate a television program for broadcast quality, he uses the Vectorscope, a commonly used measurement device that determines the value of color.
• By adjusting the rate and delay using a waveform monitor and a vectorscope, the corrected signal can now match the timing of the other devices in the system.
• Whereas an oscilloscope or waveform monitor normally displays a plot of signal vs . time, a vectorscope displays an demodulating and demultiplexing the two components to be analyzed internally ).
• A vectorscope uses an overlaid circular reference display, or " graticule ", for visualizing chrominance signals, which is the best method of referring to the phase.
• Originally, these were separate devices; however modern waveform monitors include vectorscope functionality as a separate mode . ( The combined device is simply called a " waveform monitor " ).
• A vectorscope for SECAM uses a demodulator similar to the one found in a SECAM receiver to retrieve the U and V colour signals since they are transmitted one at a time ( Thomson 8300 Vecamscope ).
• The vectorscope can be set up for 75 % or 100 % bars by adjusting the gain so that the color burst vector extends to the " 75 % " or " 100 % " marking on the graticule.
• In the Hayes factory are circuit board inserters, ovens to bake parts into place, wave soldering machines, in-circuit testers, a bar code printer, oscilloscopes from Tektronix and something called a Vectorscope from NTSC.
• The waveform-mode graticule of these instruments is implemented with a silkscreen, whereas the vectorscope graticule ( consisting only of bar targets, as this family did not support composite video ) was drawn on the CRT by the electron beam.
• The reference signal used for the vectorscope's display is the color burst that is transmitted before each line of video, which for NTSC is defined to have a phase of 180? corresponding to the nine-o'clock position on the graticule.