Tektronix VM700T - page 12

Measurement methods

The following paragraphs specify

the methods for each Option 11

measurement. Where appropriate,

reference is made to the relevant

CCIR recommendation.

Line blanking timing measurements

Color Burst Duration: Measured

between the half-amplitude

points of the burst chrominance

envelope. Result expressed as

the number of cycles between

the half-amplitude points. See

duration “h’’in waveform

diagram. CCIR Report 624-1.

Front Porch Duration: Measured

from the half-amplitude point

between peak white-level and

blanking to the half-amplitude

point of the leading edge of sync.

See duration “c’’in waveform

diagram. CCIR Report 624-1.

Line Blanking Interval: Mea-

sured from the half-amplitude

point between peak white-level

and blanking at the front

porch to the half-amplitude

point between blanking-level

and peak white level at the

back porch. See duration “a’’

in waveform diagram. CCIR

Report 624-1.

Line Sync Rise and Fall Time

(Build-up Times): Measured

between the 10% point and

the 90% point of the line-syn-

chronizing pulse leading edge

(Rise Time) and trailing edge

(Fall Time).

Line Sync Width: Measured

between the half-amplitude

points on the leading edge and

trailing edge of sync. See dura-

tion “d’’in waveform diagram.

CCIR Report 624-1.

Sync-to-Start of Burst: Mea-

sured from the half-amplitude

point of the leading edge of

sync to the half-amplitude

point of the leading edge of the

burst chrominance envelope.

See duration “g’’ in waveform

diagram. CCIR Report624-1.

Field blanking timing measurements

Equalizing Pulse Duration:

Measured between the

half-amplitude points of the

leading edge and trailing edge

of the equalizing pulse. See

duration “p’’in waveform dia-

gram. CCIR Report 624-1,

Figure 2-1 (a), (b), and (c).

Broad Pulse Duration:

Measured between the

half-amplitude points of the

leading edge and trailing

edge of the broad pulse. See

duration “q’’ in waveform

diagram. CCIR Report 624-1,

Figure2-1 (a), (b), and (c).

Line Blanking Timing Waveform Measurements.

Field Blanking Timing Waveform Measurements.

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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: