Tektronix 1720

Operating Instructions
2–20
1720/1721
cy
MG
Q
b
U
10°
20°
30°
40°
50°
20%
2.5 IRE
10°
10°
2.5°
20%
70.68°
60.68°
50.68°
2.5°
Figure 2-13: Fine detail of the 1720 graticule magenta target.
On the 1721 graticule, each chrominance vector related to the +V burst
terminates in targets that are in the shape of two boxes (a small box inside a large
box). See Figure 2-14. The large box represents ±10° centered on the exact
chrominance phase and ±20% of chrominance amplitude centered around 100%
standard amplitude. The dimensions of the inner target represent ±3° and ±5%
of chrominance amplitude; the vectors associated with the –V burst terminate in
the smaller targets.