Using the Equipment
3.13.6.5 Functional Description
Figure 3.107 Test Pattern Display Fields
The RX8000 provides the ability to display test patterns on all of its video outputs,
that is CVBS, SDI and where appropriate, HD-SDI and RGB. Currently the unit
supports the following test patterns:
• None – This is the default setting for the Test Pattern option. This disables the
test pattern and the decoded video from the selected service will be output.
• 75% Bars and Red – This provides a set of calibrated color bars, these are not
SMPTE Color Bars but instead the top two-thirds of the picture contain seven
vertical bars at 75% intensity and the bottom third is filled with red.
• Border
• Bars – This provides a set of calibrated color bars, these are not SMPTE Color
Bars but instead contain a full field of 8 calibrated colors. These include a black
bar (blank level in PAL 54mV above black in NTSC) and a white level bar
(700 mV or 100 IRE in PAL 714 mV 100 IRE in NTSC) these bars can be used
to calibrate the color within downstream equipment using processes similar to
those defined for calibration using SMPTE color bars.
• Pathological – This pattern is designed to stress the phase locked loop of SDI
(serial digital) equipment. The pattern is designed to create the probability of
long strings of 1s and then long strings of the opposite polarity on the digital
output signal, this can cause poorly designed PLLS to unlock.
• Multiburst – This is a series of frequency sweeps throughout the range of the
television signal, this can be used to verify the frequency response of the
downstream equipment.
• Monitor Lineup – This pattern consists of a calibrated border, this border is
designed to be central within the connected monitor, as such it can be used to
calibrate the horizontal and vertical positioning of downstream monitoring
equipment.
• Contrast – The contrast test pattern provides a full luminance sweeps from
white level to full back, this can be used to calibrate the luminance of
downstream equipment.
• White – This provides a full field white level (100 IRE).
All of the above test patterns are available for all of the currently supported output
standards.
The standard for the test patterns is set up using the Test Pattern Standard option.
This allows the following standards to be set as default:
• 480i 29.97
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