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1
1.2.3 Track Jump
The system selects a track jump method according to the target move number of tracks from the following three schemes:
A
Interval Jump, Multi Jump, and Traverse Seek.
1. Interval Jump
Detailed seek is possible because this scheme repeatedly performs track jump by 1 track. This scheme is selected when
it is close to the target track or it conducts a seek operation to an adjacent track.
2. Multi Jump
It counts the both edges of a Track Cross Signal TKC and moves by the specified number of track count.
It also drives the CRG motor according to the number of jump.
3. Traverse Seek
By counting the track according to the Track Cross Signal TKC and measuring the time of TKC, it controls the movement
speed and performs the seek operation. At the same time, it minimizes the vibration in the pick-up that will occur during
movement.
Here is the common jump switching setting between DVD and CD.
B
Types of jump according to target move number of tracks
DVD
1-10 Interval Jump
11-500 Multi Jump
501-1000 Combination of Multi Jump and Interval Jump
1001-Traverse Seek
Here are the wavefoms of Track Jump.
C
Tracking-on process
D
E
F
6
1
2
CD
1-10 Interval Jump
11-100 Multi Jump
101-500 Combination of Multi Jump and Interval Jump
501-Traverse Seek
CX-3311
2
3
3
4
4
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