KB9223 Datasheet, PDF (30/34 Pages) Samsung semiconductor – RF AMP & SERVO SIGNAL PROCESSOR

KB9223 / KB9223-L
PRELIMINARY
RF AMP & SERVO SIGNAL PROCESSOR
4.2 Tracking gain ($820~$83F)
Item
Hexa
Tracking gain $820~$83F
Data(5bits)
D4~D0
initial value
$820
ISTAT(pin31)
GAIN
TRCNT(pin30)
TGL
4.3 Tracking balance & gain window level setting
Item
Hexa
D3
D2
D1
D0 initial value
window level setting
$84X
gain
balance
0
0
$840
•The tracking balance and gain window level is set by D2,D3 data and the value has two
kinds of window levels set
4.3.1 Tracking balance window level
D2 data
Tracking balance window level
0
1
-10~+15mV -20~+20mV
4.3.2 Tracking gain window level
D3 data
Tracking gain window level
0
1
250~400mV 150~300mV
4.4 Focus loop offset adjustment start command($841,$842)
This command is used for adjusting focus error bias and removing focus servo offset.
This command is executed during laser diode off.
Hexa command
$841
$842
meaning
Focus error bias adjustment start command
Focus servo offset cancel adjustment start command
4.5 APC circuit operation and Interruption on/off setting condition($85X)
This command is used for setting of laser diode on/off ,sub type(P_sub or N_sub) of laser diode and
interruption countermeasure circuit on/off.
Item
Hexa
D3
D2
D1
D0
initial value
APC &
Interruption on/off
condition
$85X
LD on/off
0 : On
1 : Off
Sub-type
0:N_sub
1:P_sub
Interruption ON/OFF
and time setting
$858
M/M-97-P006
30
1997. 10. 17