Atec Tektronix-VM700T - Manual (Page 13)

Color Bar Measurements
Color Bar Amplitude Error:
Measured as deviation of
the peak-to-peak amplitude
of each color bar from the
nominal value for that color
bar expressed as a percent
of the nominal value. Six
values reported.
Color Bar Phase Error:
Measured as deviation of the
phase of each color bar from
the nominal phase for that
color bar, relative to burst
phase. Six values reported.
Color Bar Chrominance-
Luminance Gain Ratio:
Measured as ratio of chromi-
nance level to luminance level
of each color bar, relative to
the nominal ratio for each
color bar. Six values reported.
Color Amplitude Phase C/L Gain
Ratio
Yellow 67.36% 167.59 deg 1.0092
Cyan 94.74% 283.54 deg 1.8045
Green 89.04% 240.67 deg 2.0123
Magenta 89.04% 60.67 deg 2.8957
Red 94.74% 103.54 deg 4.2106
Blue 67.36% 347.59 deg 8.1652
FCC Color Bars Nominal Values
(Source: FCC Rule 73.699, Figure 14).
Amplitude and Phase Measurements
(FCC or NTC-7 Composite VITS)
Bar Top: Measured as the ratio
of the bar top to Zero Carrier
amplitude to the blanking (at
back porch) to the Zero Carrier
amplitude. Result expressed as
a percent of Max Carrier.
Bar Amplitude: Measured
from the reference blanking
level (at back porch) contained
within the test line to the level
at the center of the bar.
Burst Amplitude: VITS not
required. Burst amplitude
must be at least 10 IRE.
Measured as peak-to-peak
amplitude of the color burst at
burst center.
Chrominance-Luminance
Delay Inequality (Relative
Chrominance Time): Measured
as the time difference between
the luminance component and
chrominance component of
the modulated 12.5T pulse.
Chrominance-Luminance
Gain Inequality (Relative
Chrominance Level):
Measured as the peak-to-peak
amplitude of the chrominance
component of the modulated
12.5T-pulse.
Differential Gain: Measured
as the absolute amplitude
difference between the smallest
and largest staircase chromi-
nance packets. Result expressed
as a percent of the largest
packet amplitude.
Differential Phase: Measured
as the largest difference in
phase between any two
staircase chrominance packets.
Luminance Non-linear
Distortion: Measured as the
difference between the largest
and smallest step amplitudes
of the staircase at the center of
each step. Result expressed as
a percent of the largest step
amplitude difference.
Relative Burst Gain: Measured
as the difference between the
peak-to-peak amplitude of burst
and the staircase chrominance
packet located at blanking.
Result expressed as a percent
of the packet amplitude.
Relative Burst Phase:
Measured as the difference in
phase between the color burst
and the staircase packet
located at blanking.
Sync Amplitude: Measured
from the tip of the horizontal
sync pulse to blanking level.
Blanking Level: Measured as
the ratio of the blanking (at
back porch) to Zero Carrier
amplitude to the sync tip to
Zero Carrier amplitude. Result
expressed as a percent of
Max Carrier.
Sync Variation: Measured as
the peak-to-peak variation of
the horizontal sync pulse
amplitude within every third
line of a field.
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