Tektronix VM700T - page 14

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 chrominance

packet superimposed and part

of which has not. The result is

the difference 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

element 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

isfound 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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Contents

Main VM700T (turbo) Video Measurement Set Option 11 PAL Video Measurements Page Even a single horizontal synchronization pulse can be displayed at a high intensity. Main Measure Mode display of available measurements. MEASURE MODE BAR LINE TIME BURST FREQUENCY CHROMINANCE TO LUMINANCE BOUNCE CHROMINANCE NON-LINEARITY COLOR BAR DIFFERENTIAL GAIN AND PHASE Differential Gain and Phase measurement. FREQUENCY RESPONSE AND GROUP DELAY HORIZONTAL BLANKING INCIDENTAL CARRIER PHASE MODULATION JITTER HORIZONTAL TIMING #000 Level(b-a) = 700.0 mV VERTICAL BLANKING SCH Phase measurement. Noise Spectrum measurement. Vertical Blanking display. NOISE SPECTRUM AUTO MODE LINE BLANKING TIMING MEASUREMENTS FIELD BLANKING TIMING MEASUREMENTS OTHER TIMING MEASUREMENTS AMPLITUDE AND PHASE MEASUREMENTS Page VM700T Video Measurement Set Channel A System Default 07-Aug-96 19:06:58 VM700T Video Measurement Set System Default Violated Limits Lower Upper Page Page Page Ordering Information Contact Tektronix: