Samsung VP-L900 Training Manual page 104

(2) Capstan Phase control
It records the PILOT signal of 4 types in the each track of the tape.
Is controlled signals for the normal tracking, while play in order to detect the location of the head.
Head Switching
Signal
Pickup piolt
!
from tape in
playback
SEL1
SEL2
@
Reference piolt
3f
H
Comparison
result of
l ! - @ l
f
H
ATF error
Samsung Electronics
CH1
f
1
f f f f
1 2 1 2
16KHz
CH2 CH1
f f
2 3
f f f f
3 2 3 4
46KHz
a
b
Micom's check point
Fig. 6-20
Circuit Operating Description
CH2
f
4
f f f f
3 4 1 4
c
CH1
f
1
f f f
1 2 1
6-25