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C/L Gain Inequality: Measured
as the difference between the
sampled peak-to-peak ampli-
tude of the 700 mV (nominal)
chrominance packet (G1 or G2)
and the sampled amplitude of
the luminance bar (also nomi-
nally 700 mV). Result expressed
as a % of sampled bar amplitude.
Sign is positive if the chromi-
nance amplitude is greater than
the luminance amplitude. See
element G1 or G2 and CCIR
Recommendation 569.
C/L Delay Inequality: Measured
as the time-difference between
the 10T or 20T composite pulse
chrominance component
center and the composite
pulse luminance component
center. Result expressed in
nanoseconds. The sign of the
result is positive if the
chrominance component lags
the luminance component.
See element F and CCIR
Recommendation 569.
C/L Intermodulation: Measured
on a 350 mV pedestal, part of
which has had chr
ominance
packet superimposed and part
of which has not. The result is
the dif
fer
ence between the
pedestal level under the
chrominance packet after
the chrominance has been
filtered out and the pedestal
level where no chrominance
pedestal was superimposed.
Result expressed as a % of
sampled bar amplitude. Sign
is positive if the level of the
pedestal which was under
the chrominance is greater
than the other level. See
e
lement G1 or G2 and CCIR
Recommendation 569.
Differential Gain: Measured
as peak-to-peak differential
gain. The 5-riser staircase
chrominance packet with the
greatest peak-to-peak amplitude
i
s found and the ratio of that
amplitude to the peak-to-peak
amplitude of the blanking
level chrominance packet is
determined and subtracted
from unity. A similar ratio is
determined using the packet
with the least peak-to-peak
amplitude and that ratio is
subtracted from unity. The
measurement result is the
sum of the two differences.
See element D2 and CCIR
Recommendation 569.
Differential Phase: Measured
as peak-to-peak differential
phase. The maximum phase
difference (absolute value)
between a 5-riser staircase
chrominance packet and the
blanking-level chrominance
packet is determined. Likewise,
the minimum phase difference
(absolute value) is determined.
The measurement result is the
sum of these two phase differ-
ences and is expressed in
degrees. See element D2 and
CCIR Recommendation 569.
Luminance Non-linear
Distortion:
Measured by com-
paring the differences between
adjacent pairs of the six lumi-
nance levels that make up the
5-riser staircase. The measure-
ment result is the largest %
deviation in adjacent step sizes.
The sign is always positive.
See element D1 and CCIR
Recommendation 569.
Element F, G1, and G2 (CCIR Recommendation 567).
Element D1 and D2 (CCIR Recommendation 569).
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