Quantum Data 980 DP, User Manual

Page: 364 / 389

980 DP Video Generator - User Guide Rev. A4
Page 364 July 14, 2014
11.161 SMPTEbar, SMPTEbr2
11.161.1 Description
This image is based on an engineering guideline (EG1-1990) test signal specified by the Society of Motion Picture
and Television Engineers (SMPTE). The SMPTE pattern, in turn, is derived from an EIA standard test pattern
(RS-189-A). The image, is set up to be generated by an 801GX generator as an encoded TV output. It is designed
for adjusting the color settings of a television monitor by eye. It can also be used with a TV waveform analyzer and
vectorscope for testing video signal processors and color decoders. The image is available on all models as a
component RGB signal. Some of the image
’s elements have some differences from the original SMPTE
specification.
These differences are given in descriptions of the individual elements.
•
The upper 67% of the image consists of a series of color bars. These bars match the order of the bars in
the SMPTE and EIA patterns. They are similar to the 801GX
’s TVBar_75 image without the last black bar.
•
The left side of the lower 25% of the image contains isolated -I and Q color difference signals that match
the original EIA and SMPTE patterns. The -I signal appears as a bluish-gray bar and the Q signal appears
as a purple bar on a TV monitor. The bars are separated by a white (+100 IRE) bar.
•
The right side of the lower 25% of the image contains a narrow 12.5 IRE gray bar. Due to a hardware
limitation on the 801GX, this portion of the pattern does not match the original EIA and SMPTE patterns.
The original patterns had +3.5 (blacker than black) and +11.5 IRE bars separated by a +7.5 IRE (black)
bar.
•
The remaining central 8% of the image contains a row of chroma set bars. These bars are part of the
SMPTE pattern but are not in the EIA pattern. The order of the alternating color and black bars matches
those in the SMPTE pattern.
11.161.2 Test
Color video performance.