(4) EIA standard color bar signals comply with RETMA ENGINEERING COMMITTEE
TR-4 on television transmitters, "EIA Standard for Encoded Color Bar Signals." It
is used for adjustment of color monitors and encoders and for making rapid checks
of color television transmission systems.
(5) The standard EIA signal consists of two major parts. Three-fourths of
the active scanning lines in each field are divided into seven equal intervals
arranged in descending order of luminance as follows: gray, yellow, cyan, green,
magenta, red, and blue (fig 3-33a).
The remaining one-fourth of active scanning
lines in each field is used for the transmission of special test information
consisting of a subcarrier signal envelope with a phase corresponding to a
reference white pulse, a subcarrier signal envelope with a phase corresponding to -
1, and a reference black interval (fig 3-33b).
Figure 3-33a, b, and c. Picture monitor, waveform monitor, and vectorscope
displays of the standard EIA test pattern signal