GRASS VALLEY LDK 3000 -, Руководство пользователя

Страница: 60 / 102

60 LDK 3000 HD camera User’s Guide (v1.0)
Chapter 5 - Video setup
5.7.2 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 Hz. 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.
5.7.3 Clean scan
When shooting computer monitors with higher frame frequencies than the camera’s use the
Clean Scan function 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 preferred 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. The Exposure time returns to its previous non-variable
setting.
When Clean Scan is on, the Non-standard indicator in the viewfinder lights.