Tektronix 1740A/1750A - Manual (Page 83)

Basic Measurements
1740A/1750A Series Waveform/Vector Monitor User Manual
4-2
NTSC Vertical Scales
The NTSC graticule is shown in Figure 4-1. The left side of
the graticule is scaled in IRE units and extends from --50 to
+120 IRE in 10 IRE increments. A mV scale has been added
to the right side of the NTSC graticule to facilitate compo-
nent measurements.
Black level setup is denoted by a dashed line at 7.5 IRE.
There are
± 2 IRE and ± 4 IRE markings at the center of the
--40 IRE line to assist in measuring sync amplitude. This
scale is designed for use with two line or two field sweep
rates.
The graticules are also marked for K--Factor tolerances and
linear-distortion measurements. These measurements will be
described later in this section.
K Factor
Setup
Audio
100% White
Level
75% White
Level
Baseline
Sync Tip
Figure 4-1. NTSC waveform/vector graticule.