Sony XCDSX90 User Manual (XCDV60_V60CR_SX90_SX90CR_U100_U100CR_Technical_Manua - Page 31

Control Notes on the Camera Operations If Frame Rate Decrease Occurs On this camera, frame rate may decrease depending on your shutter settings. a When the exposure time is shorter than one frame, and the exposure time setting is shortened using the shutter b When the shutter is set to Auto, and the exposure time decreases automatically In either case, the camera tends to skip 1 frame image, resulting in a decrease in the frame rate. Keep this in mind when using an application that switches exposure times frequently. c With a long exposure In long exposure mode, the exposure time is set longer than the image transmission cycle. In this case, frame rate decreases according to the exposure time. When Using Trigger Mode This camera is set to accept a trigger at the fastest possible timing and it can accept overlap of the next trigger signal during video transmission as the default setting. For this reason, a trigger inhibition period is not available. Thus, if a trigger signal is input before the CCD can change to the state where it can accept exposures, multiple exposures can occur, and it cannot capture the correct image. Design the trigger generation circuit so that the trigger cycle is not faster than necessary. For the same reason, a malfunction may occur when noise overlaps a trigger signal. In this case, suppress noise in the trigger generation circuit. When the above conditions are unavoidable, the trigger inhibition period can be limited only while the image is being output. Keep in mind, however, that if the trigger inhibition feature is enabled, the overlap trigger cannot be accepted and the minimum trigger input cycle becomes longer according to the exposure time. On Sensitivity in Binning Mode In the Binning mode, the vertical signal is factored in, so the sensitivity is doubled. The frame rate is also doubled and the exposure time is halved, so this effect is canceled out. On the other hand, when a shorter exposure time is set, the effect of this inclusion appears, and the sensitivity increases. When setting the exposure time in the Binning mode, take this into consideration. Auto Shutter Control and Absolute Value Shutter Control The auto shutter control function cannot be used in the Absolute value control mode. When Shutter is set to AUTO, the Absolute value control mode is automatically canceled. On Accuracy of Auto White Balance This camera integrates the R, G and B levels within the area specified by the AWB detection frame, and adjust the R and B gains so as to equalize each level. For this reason, the correct white balance is obtained when a white subject is shot on the whole detection frame. The correct color reproduction may not be obtained during a normal scene shooting. 31