參數(shù)資料
型號(hào)： CH7013A-V
廠商： Electronic Theatre Controls, Inc.
英文描述： Digital PC to TV Encoder
中文描述： 數(shù)碼電腦電視編碼器
文件頁(yè)數(shù)： 19/46頁(yè)
文件大?。?/td> 249K
代理商： CH7013A-V
CHRONTEL
CH7013A
201-0000-041 Rev. 1.0, 6/14/2000
19
NTSC and PAL Operation
Composite and S-Video outputs are supported in either NTSC or PAL format. The general parameters used to
characterize these outputs are listed in
Table14
and shown in
Figure10
. (See
Figure13
through
18
for illustrations
of composite and S-Video output waveforms.)
CCIR624-3 Compliance
The CH7013A is predominantly compliant with the recommendations called out in CCIR624-3. The following are
the only exceptions to this compliance:
The frequencies of Fsc, Fh, and Fv can only be guaranteed in master or pseudo-master modes, not in slave mode
when the graphics device generates these frequencies.
It is assumed that gamma correction, if required, is performed in the graphics device which establishes the color
reference signals.
All modes provide the exact number of lines called out for NTSC and PAL modes respectively, except mode 21,
which outputs 800x600 resolution, scaled by 3:4, to PAL format with a total of 627 lines (vs. 625).
Chroma signal frequency response will fall within 10% of the exact recommended value.
Pulse widths and rise/fall times for sync pulses, front/back porches, and equalizing pulses are designed to
approximate CCIR624-3 requirements, but will fall into a range of values due to the variety of clock frequencies
used to support multiple operating modes
For this table and all subsequent figures, key values are:
Note:
1.
2.
3.
4.
RSET = 360 ohms; V(RSET) = 1.235V; 75 ohms doubly terminated load.
Durations vary slightly in different modes due to the different clock frequencies used.
Active video and black (F, G, H) times vary greatly due to different scaling ratios used in different modes.
Black times (F and H) vary with position controls.
Table 14. NTSC/PAL Composite Output Timing Parameters (in
μ
S)
Symbol
Description
Level (mV)
Duration (uS)
NTSC
PAL
NTSC
PAL
A
Front Porch
287
300
1.49 - 1.51
1.48 - 1.51
B
Horizontal Sync
0
0
4.69 - 4.72
4.69 - 4.71
C
Breezeway
287
300
0.59 - 0.61
0.88 - 0.92
D
Color Burst
287
300
2.50 - 2.53
2.24 - 2.26
E
Back Porch
287
300
1.55 - 1.61
2.62 - 2.71
F
Black
340
300
0.00 - 7.50
0.00 - 8.67
G
Active Video
340
300
37.66 - 52.67
34.68 - 52.01
H
Black
340
300
0.00 - 7.50
0.00 - 8.67
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CH7013B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital PC to TV Encoder
CH7013B-D 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital PC to TV Encoder
CH7013B-DF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital PC to TV Encoder
CH7013B-DF-TR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital PC to TV Encoder
CH7013B-D-TR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital PC to TV Encoder
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