Sony PMW320K Product Manual (PMW320 Operating Instruction) - Page 157
About the LCD panels, Phenomena specific to CMOS image, sensors
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Appendix About the LCD panels The LCD panel fitted to this unit is manufactured with high precision technology, giving a functioning pixel ratio of at least 99.99%. Thus a very small proportion of pixels maybe "stuck", either always off (black), always on (red, green, or blue), or flashing. In addition, over a long period of use, because of the physical characteristics of the liquid crystal display, such "stuck" pixels may appear spontaneously. These problems are not a malfunction. Note that any such problems have no effect on recorded data. Phenomena specific to CMOS image sensors The following phenomena that may appear in images are specific to CMOS (Complementary Metal Oxide Semiconductor) image sensors. They do not indicate malfunctions. White flecks Although the CMOS image sensors are produced with high-precision technologies, fine white flecks may be generated on the screen in rare cases, caused by cosmic rays, etc. This is related to the principle of CMOS image sensors and is not a malfunction. The white flecks especially tend to be seen in the following cases: • when operating at a high environmental temperature • when you have raised the master gain (sensitivity) • when operating in Slow-Shutter mode The problem may be alleviated by executing automatic black balance adjustment. Aliasing When fine patterns, stripes, or lines are shot, they may appear jagged or flicker. Flicker If recording is made under lighting produced by discharge tubes, such as fluorescent, sodium, or mercury-vapor lamps, the screen may flicker, colors may vary, or horizontal stripes may appear distorted. In such cases, set the flicker-reduction function to auto mode (see page 125). If the frame rate selected for recording is close to the power-supply frequency, flicker may not be reduced sufficiently even if you activate the Flicker-Reduction function. In such cases, use the electronic shutter. Focal plane Owing to the characteristics of the pickup elements (CMOS image sensors) for reading video signals, subjects that quickly move across the screen may appear slightly skewed. Flash band The luminance at the top and bottom of the screen may change when shooting a flashlight beam or a light source that quickly flashes. You can use the supplied application software to correct clips that contain frames with flash bands. Note on data compatibility with other XDCAM EXseries products When you use a PMW-EX1/EX3/EX30 to play materials recorded on the camcorder, any media in which clips of formats not supported by the PMW-EX1/EX3/EX30 have been recorded cannot be used. The PMW-EX1/EX3/EX30 cannot divide a clip recorded on this camcorder, even if the clip is in a video format supported by the PMW-EX1/EX3/ EX30. Fragmentation If pictures cannot be recorded/reproduced properly, try formatting the recording medium. While repeating picture recording/playback with a certain recording medium for an extended period, files in the medium may be fragmented, disabling proper recording/storage. In such a case, make a backup of clips in the medium then perform formatting of the medium using OPERATION >Format Media (see page 97) in the setup menu. Important Notes on Operation 157