ix
SQEX
S
ub
Q
Ex
ternal Selects synchronizing of the sub code Q data output.
L = synched to WFCK, H = synched to EXCK
SQSO
SUBQ
S
ub code
Q
data
S
erial
O
ut
SUB
code
Q
data serial out
The data extracted from the disc containing information for system
control. (TOC, etc.).
SRCH
S
ea
RCH
Time constant connection for focus search ramp.
SSTOP
S
led
STOP
Indicates that the sled has stopped.
TE Tracking Error The difference signal from the E and F side spot detectors.
TFDR
TFON
TRDR
TRON
T
racking
F
orward
DR
ive
T
racking
F
orward
ON
T
racking
R
everse
DR
ive
T
racking
R
everse
ON
Tracking coil drive error signal.
TGU 2
T
racking
G
ain
U
p or
2
Gain control components for tracking servo.
TOC
T
able
O
f
C
ontents Data from the disc, found at the beginning, containing all
information about the disc for system control and display.
TZC
T
racking
Z
ero
C
ross Detects when tracking error crosses through zero (during jumps).
UGFS
U
n
G
uarded
F
rame
S
ync Synchronized clock derived signals are used when frame sync is
momentarily lost.
VC
VR
V
oltage
C
enter
V
oltage
R
eference
Reference voltage equal to 1/2 the supply across the IC.
VCOF
V
oltage
C
ontrolled
O
scillator
F
requency
Sets the free run frequency of the PLL s VCO.
WFCK
W
rite
F
rame
C
loc
K
7.35 kHz clock divided from phase locked VCO . Used to write
and process data before RAM.
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