Technicolor - Thomson 5400LDK - Manual (Page 44)

5-6 Operator's Manual LDK 5400 - Triax Adapter for LDK 100 Series Shooting
Sometimes when shooting TVs or computer monitors
a horizontal black bar can be seen across those
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. For displays with a
higher frame frequency, for example computer
monitors, use the Clean Scan facility.
Clean Scan
Carry out the Clean Scan function as follows:
a. press the Clean Scan button at the front of the
camcorder for about two seconds to directly access
the variable exposure (clean scan) function. The
Clean Scan submenu appears in the viewfinder.
b. Use the rotary control to change the value and so
remove the horizontal black bar.
c. If a more accurate adjustment is required set the
Cl. Scan item to Extended.
Note
Set the Clean Scan mode to Normal if a smear
effect occurs.
d. 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).
The ranges for FT cameras in Normal mode are:
from 54.7 to 121.5 for 50Hz cameras
from 60.9 to 155.1 for 60Hz cameras
The ranges for FT cameras in Extended mode are:
from 50.6 to 103.1 for 50Hz cameras
from 61.1 to 151 for 60Hz cameras
The ranges for IT cameras are:
from 50.1 to 103.1 for 50Hz cameras
from 60.1 to 151 for 60Hz cameras
Note
IT cameras are only using the extended mode.
Shooting Screens
V-SHIFT
The vertical shift switch (V-SHIFT) at the front of the
camera is used for displays with the same frame
frequency as the camera, for example TV sets. It is an
up/down type switch. Pressing the switch moves the
black bar up or down so that it is no longer visible in
the viewfinder. This function is only active when the
camera is not genlocked and when it is not on-air.
If the frame frequencies of camera and monitor are
different use the clean scan function.
CRT Exposure [FT]
A third possibility can arise when shooting a monitor
whose synchronization is locked to the camera's.
Stripes might be visible in the picture of the monitor.
(This is more usual with 16:9 cameras.) To remove
these disturbing line pairing effects between monitor
and camera lines, select the CRT option with the
Exposure time switch.