Tektronix SPG8000A, User Manual

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90 SPG8000A User Manual
General overlay settings
These menu items appear at the top of the Overlay submenu:
•
Text/Circle Blink Enable : Select this check box to enable the blinking
function of the text and circle overlays. When enabled, use the drop - down
list to select a fast or slow blinking mode.
Select the Fast blink mode to set the overlay to blink at approximately
0.5 second intervals. Select the Slow blink mode to set the overlay to blink
at approximately 1.0 second intervals.
•
Border Enable : Select this check box to display a black border around the
text and circle overlays.
Note : Turn on the border to provide cleaner transitions between the overlay and the
test signal. This is especially useful for 4:2:2 format signals, which may have some
ringing when the border is turned off.
Logo overlay settings
Use these settings to select a logo to overlay on the output test signal and to set the
display position of the logo. Figure 23 shows the Overlay Logo settings.
Figure 23: SDI Overlay Logo settings
Note : To display a logo, you need to create a logo file (.bmp) and use FTP or a
USB memory device to copy the file to the SDI7/Logo directory on the instrument.
The file must be installed in the Logo folder. Files installed in the wrong location
will be ignored by the instrument. (See Transfer or install user files .)
Logo displays work best with the uncompressed BMP images (24 bits and 32 bits
true color). Logo displays do not work with RLE8 or RLE4 BMP compression.
BMP files are not scaled for each raster size. For example, a 320×240 size bitmap
will be rendered as 320×240 pixels regardless of the current raster area. The bitmap
would occupy about 25% of the active video for the SD-525 format, but less than 4%
of a 1920×1080 picture. Therefore, you might need to choose a bitmap size
appropriate for the target display resolution when using the logo overlay.
These settings are available for the Logo overlay:
•
Logo Enable
: Select this check box to enable the Logo overlay and to
enable the Logo overlay control settings.
•
Source : Use the drop- down list to select a logo file stored in the
SDI7/Logo directory.
The default logo is the “first” file in the SDI7/Logo directory, as sorted by
the date of the logo file (oldest first). If the factory - provided logo files are