CXD3018Q/R
$3D (preset: $3D 00 00)
D15 D14 D13 D12 D11 D10 D9
D8
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
0
SFID SFSK THID THSK ABEF TLD2 TLD1 TLD0
SFID:
SFSK:
THID:
THSK:
SLED servo filter input can be obtained not from SLD in Reg, but from M0D, which is the TRK
filter second-stage output.
When the low frequency component of the tracking error signal obtained from the RF amplifier
is attenuated, the low frequency can be amplified and input to the SLD servo filter.
Only during TRK servo gain up2 operation, coefficient K30 is used instead of K00. Normally, the
DC gain between the TE input pin and M0D changes for TRK filter gain normal and gain up2,
and error occurs in the DC level at M0D. In this case, the DC level of the signal transmitted to
M00 can be kept uniform by adjusting the K30 value even during the above switching.
TRK hold filter input can be obtained not from SLD in Reg, but from M0D, which is the TRK
filter second-stage output.
When signals other than the tracking error signal from the RF amplifier are input to the SE input
pin, the signal transmitted from the TE pin can be obtained as TRK hold filter input.
Only during TRK servo gain up2 operation, coefficient K46 is used instead of K40. Normally, the
DC gain between the TE input pin and M0D changes for TRK filter gain normal and gain up2,
and error occurs in the DC level at M0D. In this case, the DC level of the signal transmitted to
M18 can be kept uniform by adjusting the K46 value even during the above switching.
See "§5-20. Filter Composition" regarding the SFID, SFSK, THID and THSK commands.
The focus error (FE) and tracking error (TE) can be generated internally.
When 0, the FE and TE signal input mode results. Input each error signal through the FE and
TE pins. (default)
ABEF:
When 1, the FE and TE signal generation mode results and the FE and TE signals are generated
internally.
TLD2 to 0:
These turn on and off SLD filter correction independently of the TRK filter.
See $38 (TLC2 to TLC0) and Fig. 5-3.
Traverse center correction
TLC2
TLD2
TRK filter
OFF
SLD filter
OFF
0
1
—
0
ON
ON
ON
OFF
1
Tracking zero level correction
TLC1
TLD1
TRK filter
OFF
SLD filter
OFF
0
1
—
0
ON
ON
ON
OFF
1
VC level correction
TLC0
TLD0
TRK filter
OFF
SLD filter
OFF
—
0
0
1
ON
ON
OFF
1
ON
: preset, —: don't care
– 117 –
ETC [ ETC ]
