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參數(shù)資料
| 型號： | S1L9226X |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | RF AMP & SERVO SIGNAL PROCESSOR |
| 中文描述： | 射頻放大器 |
| 文件頁數(shù)： | 35/56頁 |
| 文件大小： | 454K |
| 代理商： | S1L9226X |
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RF AMP & SERVO SIGNAL PROCESSOR
S1L9226X
5
PRELIMINARY
RHI: High level threshold value
RLI: Low level threshold value
Vdc: Window comparator input voltage
TBAL: And gate output value of the window comparator output
An Example of Tracking Balance Control
Out of $8000
→
$801F 32 steps, the upper and lower 32 steps are used and recommand the CLV to CLV-P mode.
After receiving $8110 as the gain when the focus and tracking are on, the control flow checks TRCNT frequency in
ISTAT to see if the more than 7 TRCNT entered during 10ms. If yes, it checks the ISTAT, if no, it checks the
number of TRCNT three times and goes on to the ISTAT check.
Repeats fail, it raises the balance switch by 1 step. If ISTAT does not immediately go to H, it for 10 ms during
ISTAT check after which it check whether ISTAT is H continuously for 10ms, is repeated three times. If the three
repeats fail, it raises the balance switch by 1 step.
The above wait 10 ms while running the system. It finds the average of the values obtained the three repeated
execution of the entire above balance control. If only the balance values are from two of the three repeats, these
values are averaged. 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.
Balance Control Flowchart 1
Start
- Environment Setting
Focus on $08
Spindle on CLV-P mode
Tracking off $20
Sled off gain $8110
Balance Window Level
Setting
Check to see if
TRCNT is 7 for 10ms
ISTAT = H
Present Control Value
+2 Step then, ADJ end.
B0 to B4
Switch Control
Balance ADJ. Start $8000
Other Method
- Can balance adjust while
moving tracks
- $F03 easy to trcnt freq
check in the 2X mode
-20mV - +20mV $84 X0XX
-30mV - +30mV $84 X1XX
Almost
±
20mV
Is ISTAT = H
Check if ISTAT is H after
waiting 10ms repeat 3 times
Change switch if failure
after 3 repeats
Repeat 3 times
Change switch if failure
after 3 repeats
NO
YES
YES
NO
Balance ADJ. Switch
Incnease by 1 step
$8000 -> $801F
If finds the average of the values obtained the
three repeated execution of the entire above
bacance control.
If only two out of the three tries ware successtial in
getting a bacance value, average the two value.
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