Circuit Operating Descriptions
7-20
(7) V-Lock Phase
V-lock pulse is used for adjusting the picture’s vertical vibration in trick play (still,slow).
The value is varied by tracking up/down key in trick play mode the variable range from 3H to 12H .
In trick play mode, the V-LOCK pulse position of CH-1 is variable but CH-2 is fixed.
During search mode ,both CH-1, 2 and V-LOCK position are fixed to 6.5H.
CH2
CH1
HEAD SW EDGE
V-LOCK PULSE
PEDESTAL LEVEL
1
2
H
Fig. 7-20 V-LOCK PULSE
