Bt860/861
3.0 Digital Processing and Functionality
3.2 Effects
Multiport YCrCb to NTSC/PAL /SECAM
Figure 3-11. SECAM Low Frequency Pre-emphasis
Filter
10
8
6
4
2
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Frequency in MHz
1
861_023
3.2.3 Internal Colorbars, Blue Field, and Black Burst
The Bt860/861 can be configured to generate 100% amplitude, 75% saturation
(100/7.5/75/7.5 for NTSC/PAL-M with set-up, 100/0/75/0 for PAL/SECAM)
colorbars by setting register bit ECBAR (17[1]) bit to a 1. The Bt860/861 can also
produce a blue field by setting register bit BLUE_FLD (17[6]) to 1, and black
burst by setting register bit EACTIVE (1D[1]) to 0. Pixel inputs are ignored while
any of these waveforms are being produced.
Example colorbars for different output formats are illustrated in Figures 3-12,
3-13, and 3-14. Specific levels are listed in Tables 3-5 through 3-8.
D860DSA
Conexant
3-15
CONEXANT [ CONEXANT SYSTEMS, INC ]
