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參數(shù)資料
| 型號： | CH7009A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Chrontel CH7009 DVI / TV Output Device |
| 中文描述： | 昆泰CH7009和DVI / TV輸出設備 |
| 文件頁數(shù)： | 26/46頁 |
| 文件大?。?/td> | 580K |
| 代理商： | CH7009A |
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CHRONTEL
Video Bandwidth Register
CH7009A
VBW
26
201-0000-035 Rev 1.1, 5/8/2000
Symbol:
Address:
Bits:
02h
8
Bits 1-0 of register VBW control the filter used to limit the bandwidth of the luma signal in the CVBS output signal.
A table of –3dB bandwidth values is given below.
Bits 3-2 of register VBW control the filter used to limit the bandwidth of the luma signal in the S-Video output
signal. A table of –3dB bandwidth values is given below.
Bit 4 of register VBW controls the filter used to limit the bandwidth of the chroma signal in the CVBS and S-Video
output signals. A table of –3dB bandwidth values is given in
Table 14
below.
Bit 5 of register VBW controls the signal output on the CVBS pin. When this bit is low, the S-Video luminance
signal is output at both the S-Video luminance pin and the CVBS pin. This enables the output of a black and white
image on the composite output, thereby eliminating the degrading effects of the color signal (such as dot crawl and
false colors), which is useful for viewing text with high accuracy. This also allows the output of either S-Video or
CVBS using just two DAC’s. This is useful in situations where connector space is at a premium.
BIT:
7
6
5
4
3
2
1
0
SYMBOL:
TYPE:
DEFAULT:
VBID
R/W
CFRB CVBWB
R/W
0
CBW
R/W
YSV1
R/W
YSV0
R/W
YCV1
R/W
YCV0
R/W
R/W
0
0
1
1
1
1
0
Table 14: Video Bandwidth
Mode
CBW
YSV[1:0] and YCV[1:0]
01
2.690
3.360
2.290
2.810
3.600
4.610
3.040
3.770
3.200
4.030
2.710
3.350
3.870
2.690
3.360
4.030
2.810
3.210
3.440
3.160
3.610
3.870
3.140
3.840
4.480
3.360
4.100
0
1
00
10
11
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
0.620
0.775
0.529
0.648
0.831
1.060
0.703
0.870
0.738
0.930
0.624
0.773
0.892
0.620
0.775
0.930
0.648
0.740
0.793
0.729
0.833
0.892
0.724
0.886
1.030
0.774
0.945
0.856
1.070
0.730
0.894
1.150
1.470
0.970
1.200
1.020
1.280
0.862
1.070
1.230
0.856
1.070
1.280
0.894
1.020
1.100
1.010
1.150
1.230
0.999
1.220
1.430
1.070
1.310
2.300
2.880
1.960
2.410
3.080
3.950
2.610
3.230
2.740
3.460
2.320
2.870
3.310
2.300
2.880
3.460
2.410
2.750
2.950
2.710
3.090
3.310
2.690
3.290
3.840
2.880
3.510
3.540
4.430
3.020
3.700
4.750
6.080
4.010
4.970
4.220
5.320
3.570
4.420
5.100
3.540
4.430
5.320
3.700
4.230
4.530
4.160
4.760
5.100
4.130
5.060
5.910
4.430
5.400
5.880
7.350
5.010
6.140
7.870
10.100
6.660
8.240
7.000
8.820
5.920
7.330
8.450
5.880
7.350
8.820
6.140
7.010
7.510
6.900
7.890
8.450
6.860
8.400
9.790
7.340
8.960
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