Tektronix 1760 User Manual

Page 107

Basic Measurements

1760 Series Component Waveform/Vector Monitor User Manual

4-7

NTSC

The chrominance vectors terminate in a system of graticule
targets consisting of two boxes (a small box inside a large
box). A sample target is shown in Figure 4-4. The dimen-
sions of the large boxes represent

±10° centered on the ex-

act chrominance phase, and

±20% of chrominance

amplitude centered around standard amplitude. The dimen-
sions of the smaller boxes represent

±2.5° and ±2.5 IRE.

Figure 4-4.

Vector targets --- NTSC values (PAL values in parentheses).

PAL

For the 1761 graticule, each PAL chrominance vector related
to the +V burst terminates in targets consisting of two boxes
(a small box inside a large box). See Figure 4-2. The large
box represents

±10° centered on the exact chrominance

phase and

±20% of chrominance amplitude centered around

standard amplitude. The dimensions of the inner target rep-
resent

±3° and ±5% of chrominance amplitude; the vectors

associated with the --V burst terminate in the smaller targets.