Videotec NXPTZT - Manual (Page 48)

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48 MNVCNXPTZT_1343_EN
9.1.12.2 Flat Field Correction Menu (Gain
Switch Values)
Once inside the Gain Switch Values menu it is
possible to set one of the following parameters:
1. High-Low Threshold: Sets the temperature
threshold used by the High-Low Population
parameter to force the switching in Low Gain
mode. The value is indicated in degrees Celsius.
2. High-Low Population: Sets the minimum pixel
percentage above which the switching in Low
Gain mode is carried out.
3. Low-High Threshold: Sets the temperature
threshold used by the Low-High Population
parameter to force the switching in High Gain
mode. The value is indicated in degrees Celsius.
4. Low-High Population: Sets the minimum pixel
percentage above which the switching in High
Gain mode is carried out.
GAIN SWITCH VALUES
------------------------
1>HIGH-LOW THRESH.: 140
2 HIGH-LOW POP. : 20
3 LOW-HIGH THRESH.: 100
4 LOW-HIGH POP. : 95
Fig. 81
We recommend that you do not change
the default values which have been set
to guarantee high quality images in any
operating condition.
The settings of the Gain Change Values
Menu are effective only if the Gain
mode was set to Auto (9.1.12.1 Flat Field
Correction Menu, page 47).
9.1.12.3 Video Setup Menu
Once inside the Video Configuration menu it is
possible to set one of the following parameters:
1. Lut polarity: Sets the hue of the image shot by
the thermal camera.
2. FFC Warning: Sets the interval for which a
coloured square is displayed on the upper right
side of the video when a FFC is about to be
carried out. The interval is indicated in frames
(33ms for NTSC and 40ms for PAL). A value lower
than 15 frames automatically disables the alert.
3. Digital Zoom: Sets the type of zoom to be
applied to the video signal (OFF, Auto, 2x, 4x).
When using the Auto mode, the zoom of the
thermal camera automatically adjusts to that of
the SONY module.
4. Dynamic DDE: Sets the value of the DDE filter,
used to improve the sharpness of outline.
Typical values range from 17 and 25. Value 17
disables the filter.
5. Test Pattern: Enables the pattern test to check
the camera electronics.
VIDEO SETUP
------------------------
1>LUT POLARITY:WHITE HOT
2 FFC WARNING : 60
3 DIGITAL ZOOM: AUTO
4 DYNAMIC DDE : 25
5 TEST PATTERN: N
Fig. 82