Reference
1710J-Series Waveform Monitors
3–3
Make pulse-to-bar K-Factor measurements using the solid and short dashed lines
to the left of the line time distortion structure. These lines are scaled according to
the following formulas:
1
(1–4K)
and
1
(1
)
4K)
Where:
K=0.02 for 2% K-Factor (dashed lines)
K=0.04 for 4% K-Factor (dashed lines)
Calibrated 5X gain increases resolution to 0.4% and 0.8%.
This scaling is described in detail in CCIR Standard Volume 5, 1966.
Make sure that the center of the bar is at 100 IRE when blanking level is at
0 IRE. If necessary, use the HORIZONTAL position control to place the 2T
pulse over the measurement area and measure its amplitude.
The Horizontal reference line is the baseline at 0 IRE (NTSC) or 0.3 V (PAL).
This timing line is 12 divisions long on NTSC graticules (12.4 divisions for
PAL) and takes on different timing intervals depending on the sweep rate
selected. In 2 line sweep each major division is 10
m
s, and when magnified
(X10), each major division equals 1
m
s. In 1 line sweep each major division is
equal to 5
m
s, and when magnified (X25) each major division equals 0.2
m
s. In 2
field sweep the timing scale is of no real value, since this is a monitoring mode;
however, when 2 field sweep is magnified (X25), the entire vertical (field)
interval can be displayed.
The PAL graticule scales are from 0 to 1.2 V on the left side. See Figure 3–2.
The right side has markings at sync tip (–0.3 V), baseline (0 V), and peak white
(+0.7 V). There are 2% and 4% markings at the horizontal center of the graticule
on the 0 V line (sync tip level) to assist in measuring sync amplitude. The dashed
horizontal line at the top of the graticule is equal to 1.234 V to indicate peak
amplitude of 100% color bars.
Horizontal Scales for
NTSC and PAL Graticules
PAL Graticule Vertical
Scales
Содержание 1710J Series
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Страница 23: ...Getting Started ...
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