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參數(shù)資料
| 型號： | sda 9362 |
| 廠商： | SIEMENS AG |
| 英文描述： | DDC-PLUS-Deflection Controller(DDC 過偏轉(zhuǎn)控制器) |
| 中文描述： | DDC的加偏轉(zhuǎn)控制器（DDC的過偏轉(zhuǎn)控制器） |
| 文件頁數(shù)： | 21/39頁 |
| 文件大小： | 199K |
| 代理商： | SDA 9362 |
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SDA 9362
Semiconductor Group
21
1998-02-01
overscan). It defines the start of the reduced amplitude (factors 0.5, 0.66, 0.75) of the
vertical sawtooth (
refer page 35
). When
Start Reduced Scan
= 0 the reduction
takes place over all lines including vertical flyback.
b) control bits VR1, VR0 = 00 (no reduction of vertical size)
If
Start Reduced Scan
>
Start Vertical Scan
the D/A conversion of the sawtooth
starts (
Start Reduced Scan
-
Start Vertical Scan
) lines after begin of the
calculation.
This causes a jump of the output voltage VD+, VD- from flyback to scan level. It may
be useful to hide the automatic cut-off control lines if no overscan is desired (e.g. for
VGA display). If
Start Reduced Scan
<=
Start Vertical Scan
this byte has no effect.
Vertical EHT Compensation
This item controls the influence of the beam current dependent input signal IBEAM on
the outputs VD+ and VD- according to the following equation
V
VDPP
:
V
IBEAM
:
variation of VD+ and VD- peak-to-peak voltage
variation of IBEAM input voltage
1)
the factor 0.57 depends on
V
REFP
,
V
REFH
,
V
REFL
If
Vertical EHT Compensation
= -128 the outputs VD+ and VD- are
independent of the input signal IBEAM.
Horizontal EHT Compensation
This item controls the influence of the input signal IBEAM on the output E/W according
to the following equation:
V
EW
:
V
IBEAM
:
variation of E/W output voltage
variation of IBEAM input voltage
1)
the factor 2.12 depends on
V
REFP
,
V
REFH
,
V
REFL
If
Horizontal EHT Compensation
= -128 the output E/W is independent
of the input signal IBEAM.
AFC EHT Compensation
Deviation of the horizontal phase caused by high beam current (e.g. white bar) can be
eliminated by this control item. The beam current dependent input signal IBEAM is
multiplied by
AFC EHT Compensation
.
V
VDPP
V
IBEAM
*
Vertical EHT compensation
---------------------------------------------------------------------------------------- * 0,57
1
)
128
+
512
=
V
EW
V
IBEAM
*
Horizontal EHT compensation
-------------------------------------------------------------------------------------------------- * 2,12
1
)
128
+
128
=
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