LA7615 데이터 시트보기 (PDF) - SANYO -> Panasonic
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LA7615 Datasheet PDF : 39 Pages
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LA7615
(Test Conditions)
Parameter
[Video Block]
Symbol
Overall video gain (at maximum CONT63
contrast)
Test point Input signal
38 L-50
Test procedure
Bus bits/input signal
Measure the output signal 50 IRE amplitude (CNTHB TR24: Contrast
Vp-p) and calculate CONT63 = 20log(CNTHB/0.357).
111111
Contrast adjustment
characteristics (normal/max)
CONT32
38 L-50
Measure the output signal 50 IRE amplitude (CNTCB
Vp-p) and calculate CONT32 = 20log(CNTCB/0.357).
Contrast adjustment
characteristics (normal/max)
CONT0
Video frequency characteristics Yf03
f0 = 1 (sharp 0)
f0 = 3 (sharp 15)
38 L-50
L-CW
38
Chrominance trap level
f0 = 0 (sharp 0)
Ctrap
38 L-CW
DC restoration
ClampG
L-0
38
L-100
Luminance delay f0 = 1
YDLY
38 L-50
Maximum black stretch gain
BKSTmax
38 L-BK
Black stretch threshold
∆black(40 IRE ∆black)
BKSTTH∆
38 L-40
Sharpness (peaking) variability
characteristics
(normal)
Sharp16
L-CW
(maximum) Sharp31
L-CW
38
(minimum) Sharp0
Horizontal/vertical blanking
output level
RGBBLK
L-CW
38 L-100
Measure the output signal 50 IRE amplitude (CNTLB TR24: Contrast
Vp-p) and calculate CONT0 = 20log(CNTLB/0.357).
000000
With the input signal CW = 100 kHz, measure the
amplitude of the CW signal in the output signal
(PEAKDC Vp-p).
With the input signal CW = 10 MHz, measure the
amplitude of the CW signal in the output signal
(F03 Vp-p).
Calculate Yf3 = 20log(F03/PEAKDC).
With the input signal CW = 3.58 MHz, measure the
amplitude of the CW signal in the output signal
(F00 Vpp).
Calculate Ctrap = 20·log(F00/PEAKDC).
Measure the output signal 0 IRE DC level
(BRTPL (V)).
Measure the output signal 0 IRE DC level (DRVPH
(V)) and the 100 IRE amplitude (DRVH Vpp).
Calculate
ClampG = 100 × (1 + (DRVPH – BRTPL)/DRVH)).
Measure the time difference (amount of delay)
between the rise of the input signal 50 IRE
amplitude, and rise of the output signal 50 IRE
amplitude.
Measure the 0 IRE DC level at point A in the output
signal when the black stretch function is defeated
(black stretch off). (BKST1 (V))
Measure the 0 IRE DC level at point A in the output
signal when the black stretch function is on.
(BKST2 (V))
Calculate
BKSTmax = 2 × 50 × (BKST1 – BKST2)/CNTHB.
Measure the 40 IRE DC level in the output signal
when the black stretch function is on. (BKST3 (V))
Measure the 40 IRE DC level in the output signal
when the black stretch function is defeated
(black stretch off). (BKST4 (V))
Calculate
BKSTTH∆ = 50 × (BKST4 – BKST3)/CNTHB.
With the input signal CW = 2.2 MHz, measure the
amplitude of the CW signal in the output signal
(F00S16 Vp-p).
TR26: F0 Adjust 01
TR26: F0 Adjust 11
TR25: Sharpness
01111
TR26: F0 Adjust 00
TR23: Brightness
000000
TR24: Contrast
111111
TR23: Brightness
000000
TR24: Contrast
111111
TR31: BKST Defeat
1
TR31: BKST Defeat
0
TR31: BKST Defeat
0
TR31: BKST Defeat
1
TR26: F0 Adjust 00
TR25: Sharpness
10000
Calculate Sharp16 = 20log(F00S16/PEAKDC).
With the input signal CW = 2.2 MHz, measure the
amplitude of the CW signal in the output signal
(F00S31 Vp-p).
Calculate Sharp31 = 20log(F00S31/PEAKDC).
With the input signal CW = 2.2 MHz, measure the
amplitude of the CW signal in the output signal
(F00S0 Vp-p).
Calculate Sharp0 = 20log(F00S0/PEAKDC).
Measure the DC level of the output signal during the
blanking period (RGBBLK (V)).
TR25: Sharpness
11111
TR25: Sharpness
00000
Continued on next page.
No. 5841-20/39
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