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| 型號(hào)： | LV4124W |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 277K |
| 代理商： | LV4124W |
No.6000-3/21
LV4124W
AC Characteristics (1)
when the T41, T44, and T46 outputs are measured at the noninverted outputs.
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Luminance Signal System]
Contrast characteristics (typ.)
GCNTTP
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
13
17
21
dB
Contrast characteristics (min.)
GCNTMN
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
–9
–5
–1
dB
Maximum video gain
GV
Input SIG4 to (A) and measure the ratio of the T44 output
amplitude (white - black) to the input amplitude.
19
22
25
dB
[Luminance Signal Frequency Characteristics]
Y/C input
FCYYC
Take the T44 output amplitude with SIG7 (0 dB, no burst,
100 kHz) input to (A) as 0 dB. Modify the input frequency
and determine the frequency such that the output is down
–3 dB.
5.0
FCYCMN
2.5
MHz
Composite input
NTSC
FCYCMP
2.5
PAL
GSHP1X
Take the T44 output amplitude with SIG7
(100 kHz) input to (A) as 0 dB. Determine
the ratio of the output amplitude with a
2.5-MHz SIG7 input.
MAX
12
16
Image quality adjustment
range 1 (Y/C input)
GSHP1N
MIN
0
2
dB
GSHP3X
Take the T44 output amplitude with SIG7
(100 kHz) input to (A) as 0 dB. Determine the
ratio of the output amplitude with a 2.0-MHz
SIG7 input.
MAX
6
10
Image quality adjustment
range 3 (composite input)
GSHP3N
MIN
–2
3
dB
Input SIG2 (0 dB) to (A) and using a spectrum analyzer,
measure the 3.58 and 4.43 MHz components in the input and
in T44. Let
CLK be that difference. Use that value to
determine CRLEKY from the following formula:
CRLEKY = 150 mV
×
10
CLK/20
Chrominance signal leakage
CRLEKY
30
mV
[Luminance Signal Input to Output Delay]
Y/C input
TDYYC
250
350
450
ns
Input SIG5 (VL = 150 mV) to (A).Measure the delay time
between a rising edge in the input and the corresponding
rising edge in the T44 noninverted output.
TDYCMN
500
600
700
ns
Composite input
NTSC
PAL
TDYCMP
500
600
700
ns
[Color Difference Signal System]
Input SIG5 (VL = 150 mV) to (A) and SIG1 (0 dB, 100 kHz,
no burst) to (D). Let VC0 be the T41 output amplitude
(100 kHz) when COL = 128. Let VC2 be the T41 output
amplitude (100 kHz) when COL = 0. Let VC1 be the T41
output amplitude (100 kHz) when SIG1 is set to -10 dB and
COL = 255. Then calculate the following formulas.
GEXCMX = 20log (VC1/VC0) +10
GEXCMN = 20log (VC2/VC0)
GEXCMX
+4
+6
dB
Color difference input color
adjustment
GEXCMN
–15
–11
dB
Input SIG5 (VL = 150 mV) to (A) and SIG1 (0 dB, 100 kHz,
no burst) to (D) and (E).
Let VB be the T41 output amplitude (100 kHz), and let VR
be the T46 output amplitude (100 kHz).
Calculate VEXCBL = VR/VB.
Color difference balance
VEXCBL
0.85
1
1.15
–
Continued on next page.
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