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參數(shù)資料
| 型號： | LA76075 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | NTSC Color Television Sets |
| 中文描述： | NTSC制式彩電 |
| 文件頁數(shù)： | 19/35頁 |
| 文件大?。?/td> | 712K |
| 代理商： | LA76075 |
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No. 5845-19/35
LA76075
Item
Symbol
Measurement
Point
Input
Signal
Measurement Procedure
Bus Condition
[Chroma Block]
ACC amplitude
characteristic 1
Measure the outputs for chroma inputs of 0 dB and +6
dB and substitute in the following formula.
ACCM1 = 20log
(+6 dBdata/0 dBdata)
ACCM1
Bout
30
C-1
0 dB
+6 dB
ACC amplitude
characteristic 2
Measure the outputs for chroma inputs of 0 dB and -14
dB and substitute in the following formula.
ACCM1 = 20log
(–14 dBdata/0 dBdata)
ACCM2
Bout
30
C-1
–14 dB
B-Y/Y amplitude ratio
Measure V1, the Y output level.
CLRBY
30
YIN : L77
C-1 : No signal
Color control
characteristic 1
Measure V1, the output amplitude (Vp-p) for the
maximum color control setting, and V2, the output
amplitude (Vp-p) for the medium one, and substitute in
the following formula.
CLRMN = V1/V2
Color.1111111
(MAX)
Color.1000000
(NOM)
CLRMN
30
C-3
Color control
characteristic 2
Measure V3, the output amplitude (Vp-p) for minimum
color control setting, and substitute in the following
formula.
CLRMN = 20 log (V1–V3)
Color.0000000
(MIN)
CLRMM
30
C-3
Color control sensitivity
Measure V4, the output amplitude (V{p-p}) for a color
control setting of 90, and V5, the output amplitude (Vp-
p) for one of 38, and substitute in the following
formula.
CLRSM = 100
×
(V4–V5) / (V2
×
52)
Color.1011010
Color.0100110
CLRSE
30
C-3
Tint center
Measure the output waveform and calculate the B-Y
angle.
TINT : 1000000
TINCEN
30
C-1
Tint control maximum
Measure the output waveform, calculate the B-Y
angle, and substitute in the following formula.
TINMAX = B-Y angle - TINCEN
TINT : 1111111
TINMAX
30
C-1
Tint control minimum
Measure the output waveform, calculate the B-Y
angle, and substitute in the following formula.
TINMIN = B-Y angle - TINCEN
TINT : 0000000
TINMIN
30
C-1
Tint control sensitivity
Measure A1, the angle for a tint control setting of 85,
and A2, the angle for one of 42, and substitute in the
following formula.
TINSE = (A1–A2)/43
TINT : 1010101
TINT : 0101010
TINSE
30
C-1
Demodulator output R-
Y/B-Y ratio
Supply the L77 signal to the YIN pin and adjust the red
and blue drive digital-to-analog converters until the Y
output levels at pins 28 (RED OUT) and 30 (BLU OUT)
are closest to that at pin 29 (GRN OUT).
1. After the above adjustment, supply 0 RE to the YIN
pin and C-3 to the CIN pin, measure Vb, the BOUT
output amplitude (Vp-p), and Vr, the ROUT output
amplitude (Vp-p), and substitute in the following
formula.
RB = Vr/Vb
Color : 1000000
B Drive
R Drive
Adjusted red and blue
drive values.
RB
29
28
30
YIN : L77
C-1 : No signal
YIN : 0RE
C-3
Demodulator output G-
Y/B-Y ratio
Measure Vg, the GOUT output amplitude (V{p-p}), and
substitute in the following formula.
GB = Vg/Vb
Use the adjusted red and blue drive values from the
RB determination above.
Color : 1000000
B Drive
Use adjusted red and blue
drive values from the RB
determination above.
GB
29
C-3
Next supply the CIN signal (with only the
synchronization signal for YIN), measure V2, the
output level, and substitute in the following formula.
CLRBY = 100
×
(V2/V1) + 15%
C-2
Continued on next page.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LA7615 | Single-Chip NTSC Color TV IC |
| LA7620 | Color TV Video, Chroma, Deflection Circuit |
| LA7625 | Video, Chroma and Deflection Circuit for Color Television Sets |
| LA7629 | Color TV/Video,Chroma,Deflection Circuit |
| LA7640N | Chroma Circuit for SECAM-system Color Television Sets |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LA7612A | 制造商:SANYO Semiconductor Co Ltd 功能描述: |
| LA7615 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Single-Chip NTSC Color TV IC |
| LA7620 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Color TV Video, Chroma, Deflection Circuit |
| LA7621 | 制造商:Panasonic Industrial Company 功能描述:IC |
| LA7625 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Video, Chroma and Deflection Circuit for Color Television Sets |
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