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參數(shù)資料
| 型號： | TA1204AF |
| 廠商： | Toshiba Corporation |
| 英文描述： | ャ CORRECTION IC FOR LCD TV |
| 中文描述： | ャ校正集成電路液晶電視 |
| 文件頁數(shù)： | 16/25頁 |
| 文件大?。?/td> | 575K |
| 代理商： | TA1204AF |
TA1204AF
2001-02-07 16/25
Note 16:
Signal frequency characteristics, inter-axis deviation
Test condition 5 (CP mode, fixed polarity)
Input :
X In1
Test signal 2 (sweep)
Input test signal 2 to X In1, raise its frequency from 500kHz to 20MHz, and observe the amplitudes
of the frequency components. Measure the frequency for a 3dB fall in output amplitude. Take the
same measurements as for positive polarity by changing SW
7B
from a to b.
Output dynamic range
Test condition 4 (CP mode)
Input :
X In1
Test signal 3
VR23 :
→
Max / Min
Input a signal (0.7V
p-p
) including black and white levels to input A (X In1). Change SW
23
from a to b,
raise and lower the voltage applied to pin 23 by turning VR23 clockwise and anticlockwise, measure
the maximum and minimum black waveform levels for an output pin (pin 21 when X = B, pin 19
when X = G, and pin 14 when X = R), and thus obtain the voltage difference.
Note 17:
Note 18:
Signal output through-rate
Test condition 4 (CP mode)
Input :
X In1
Test signal 5
Input to input A (X In1) a test signal whose 10 to 90% rise / fall times are less than 50ns in a
rectangular waveform that repeats black and white levels. Measure the 10 to 90% rise / fall times in
the waveform of the output pin (pin 21 when X = B, pin 19 when X = G, and pin 14 when X = R), and
convert this to a through-rate.
Note 19:
Signal output S / N
Test condition 5 (CP mode, fixed polarity)
Input : no signal
Noise measurement band DC to 6MHz
Change SW
27
from a to b, and adjust VR27 while looking at the waveform of an output pin (pin 21,
pin 19, pin 14) so that the difference between the
γ
0 and black levels becomes 0. Measure the noise
voltage (measurement band: ~6MHz) of the output pins in this state. Repeat this measurement for
each output pin. Calculate the ratio of the No. 9 typical output amplitude to the measured noise
voltage, and express it in dB units.
For a positive polarity measurement, repeat the above measurement by changing SW
7B
from a to b.
Note 20:
Reversed polarity center voltage, typical value, inter-axis deviation
Test condition 4 (CP mode)
Input : no signal
Measure the
γ
0 levels of the positive and negative polarities of the output waveform at an output pin
(pin 21 when X = B, pin 19 when X = G, and pin 14 when X = R), and measure the mean value of the
two levels.
Repeat this measurement replacing B, G, and R as the X-axis.
Note 21:
Reversed polarity center voltage, maximum and minimum variable ranges, inter-axis deviation
Test condition 4 (CP mode)
Input : no signal
VR23 :
→
Max /
→
Min
Change SW
25
from a to b, adjust VR26 and set the voltage applied to pin 25 at 5V, thereby
minimizing the cut-off. Change SW
23
from a to b, raise and lower the voltage applied to pin 23 by
turning VR23 clockwise and anticlockwise. Obtain the center voltage of the positive and negative
γ
0
levels when the waveform of an output pin (pin 21 when X = B, pin 19 when X = G and pin 14 when
X = R) approaches V
DD
and stops rising, and set this as the maximum value. Obtain the center
voltage of positive and negative
γ
0 levels when the waveform of the output pin approaches GND and
these levels stop decreasing, and make this voltage the minimum value.
Repeat this measurement replacing B, G, and R as the X-axis.
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