CXD3018Q/R
§5-7. FCS Servo and FCS Search (Focus Search)
The FCS servo is controlled by the 8-bit serial command $0X. (See Table 5-6.)
Register name Command
D19 to D16
1 0
D23 to D20
0 0 0 0
FOCUS SERVO ON (FOCUS GAIN NORMAL)
FOCUS SERVO ON (FOCUS GAIN DOWN)
FOCUS SERVO OFF, 0V OUT
1 1
0
0
0
0
0
FOCUS
0
CONTROL
FOCUS SERVO OFF, FOCUS SEARCH VOLTAGE OUT
FOCUS SEARCH VOLTAGE DOWN
FOCUS SEARCH VOLTAGE UP
: don't care
1
1 0
1 1
Table 5-6
FCS Search
FCS search is required in the course of turning on the FCS servo.
Fig. 5-7 shows the signals for sending commands $00 → $02 → $03 and performing only FCS search operation.
Fig. 5-8 shows the signals for sending $08 (FCS on) after that.
$00 $02 $03
$00 $02 $03
$08
0
FCSDRV
FCSDRV
RF
RF
FOK
FOK
FZC comparator level
FE
FE
0
0
FZC
FZC
Fig. 5-7
Fig. 5-8
– 93 –
ETC [ ETC ]
