BK Precision 1249B, Инструкция по эксплуатации

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10
DEFINITIONS OF TERMS (CONT.)
Resolution. See "Horizontal Resolution" and "Vertical
Resolution".
Saturation. Vividness of color. Degree to which a color is
not diluted by white light. Highly saturated color is very
vivid. The same hue becomes a pastel shade when diluted
by white light. Saturation is represented by chroma
amplitude and is measured in IEEE units. The number of
IEEE units for fully saturated color vanes from hue to hue.
Set-up.
The separation between blanking and black
reference levels. This instrument uses the NTSC standard
set-up level of 7.5 units.
Staircase.
A pattern generated by the NTSC Generator.
consisting of equal width luminance steps decreasing in
amplitude. The staircase pattern is useful for checking
linearity of luminance.
Subcarrier. See “Color Subcarrier”.
VCR. Video cassette recorder.
VTR. Video tape recorder. In this manual. the term "VTR"
includes reel-to-reel and cassette type.
Vertical Blanking Interval. That portion at the beginning
of each field of composite video signal which blanks the
picture while the CRT retrace returns to the top of the
screen. The equalizing pulses and vertical sync pulse are
generated within this interval.
Vertical Resolution. Smallest increment of a television
picture that can be discerned in the vertical plane. This
increment is dependent upon the number of lines of scan per
frame, and is measured in lines. In the U.S.A. and other
countries using NTSC systems, vertical resolution is 525
lines.
Vertical Sync Pulse. A portion of the vertical blanking
interval which is made up of blanking level and six pulses
(92% duty cycle at -40 [FEE units) at twice the horizontal
sync pulse repetition rate. Synchronizes vertical scan of
television receiver to composite video signal. Starts each
frame at same vertical position (sequential fields are
offset line to achieve interlaced scan).