RCA LDK 8000 manual Shooting screens, Vertical shift V-shift, Clean scan

Chapter 5 - Operating instructions

Lighting

The exposure selection also includes lighting control positions which can be used when shooting with lighting that is operating at a different frequency to the camera. There are two positions; 50 Hz and 60 Hz. Each of these positions can be varied further in a range from -10 to +10. To reduce flicker select the frequency closest to the frequency of the lights and then vary the lighting control in the INSTALL menu to obtain the best result. (Lighting control is not available in the SportCam version.)

5.7.7 Shooting screens

Sometimes when shooting TVs or computer monitors a horizontal bar can be seen across these screens in the viewfinder. There are two ways of removing the noise bar from the picture depending on the frame frequency of the display:

•For displays with the same frame frequency as the camera, for example TV sets, use the V-shift facility. V-shift can also be used to remove any colour shifts that might occur when shooting pictures produced by DLP-type devices.

•For displays with a higher frame frequency, for example computer monitors, use the Clean Scan facility.

Vertical shift (V-shift)

Sometimes when shooting TV screens or monitors with the same display frequency as the camera, for example TV sets, a horizontal black bar is seen in the viewfinder because the camera is blanking while the TV is not. The V-shift switch shifts the camera blanking.

The V-shift switch at the front of the camera is spring-loaded with a central rest position. Holding the switch in the + or - position moves the bar up or down so that it is no longer visible in the viewfinder. This function is only available when the camera is used in the stand-alone mode. It is not active when the camera is genlocked or on-air.

When the camera is genlocked, use the V-shift function in the INSTALL menu.

Clean scan

When shooting computer monitors with higher frame frequencies than the camera use the Clean Scan function as follows to avoid horizontal bars in the picture:

1.Press the Clean Scan button at the front of the camera for about two seconds to directly access the variable exposure (clean scan) function. The CLEAN SCAN submenu appears in the viewfinder.

2.Use the Rotary control to change the value and so remove the noise bar.

3.If a more accurate adjustment is required set the CL.SCAN item to EXTENDED. (Set the mode to NORMAL if a smear effect occurs.)

4.Set the UNIT item to the prefered read out, Hz or mSec.

When you are finished shooting the monitor press the Clean Scan button for two seconds to switch off the Clean Scan function. (Exposure time returns to its previous non-variable setting.) When Clean Scan is on, the Non-standard indicator in the viewfinder lights.

☞Note

Do not shoot highlights in the Clean Scan mode as this may cause a smear effect.

LDK 8000 HDTV camera system User’s Guide (v3.0) 59