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| 型號(hào)： | KB9224 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | VIDEO-CD 2ND GENERATION |
| 中文描述： | 視頻-環(huán)糊精第二代 |
| 文件頁(yè)數(shù)： | 35/55頁(yè) |
| 文件大小： | 450K |
| 代理商： | KB9224 |
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VIDEO-CD 2ND GENERATION
KB9224
35
RLI: Low level threshold value
Vdc: Window comparator input voltage
TBAL: Window comparator outputs AND gate output value
Tracking Balance Adjust Example
Out of $8000->$81FFs 64steps, the 22 steps excepting the upper and lower 5 steps, are used ($8040~$81AF).
The limit adjust flow applies the gain to $8300 at the Focus, Tracking ON point, and checks the TRCNTs
frequency. Check if 7 TRCNT came in during 10 ms, and if the answer is YES, check ISTAT, and if NO, repeat the
TRCNT number check 3 times, then go to ISTAT Check.
If the 3x repeat fails as well, increase the balance switch one step.
Also, just in case ISTAT does not immediately go to H when ISTAT Checking, wait 10 ms. Check if it is H after the
3x repeat, and if not, increase the balance switch one step. Adjust the wait mentioned above 10 ms, when the
system is running.
Average the values found by repeating the balance adjust three times.
If only two out of the three tries were successful in getting a balance value, average the two values.
Set as balance switch, this average value, +2. This is because the balance for the system and the minus value for
the DC is stable in the system.
Precision is important in balance adjust, and about 1~2 sec is spent as adjust time, which is accounted for.
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