Sony BVU-950 - Page 32

FOR TRAINING PURPOSES ONLY
BVU-920 Section 2. DYNAMIC TRACKING
-PRELIMINARY-
2-1.
DYNAMIC
TRACKING
(DT)
SUBJECT
TO
CHANGE
The BVU-920 is not equipped with a fixed head on the drum like the existing R/P head, all playback (including
normal playback), being performed using the DT head. The DT follow-up range is from REV speed to FWD x3
speed, noiseless picture images being obtained within this range.
As shown in the diagram below, it consists of a ceramic bimorph, a position sensor (strain gauge), and the head chip.
The BVU-920 is a full-time DT, but DT functions are interrupted if speed range fluctuates from REV speed to
FWDx3 speed in search mode or during pinch-off. Wobbling is performed during DT active mode, but in normal
playback mode only for about 1.5 seconds after starting and after then it is stopped.
Fig.
2-1.
New
Dynamic
Tracking
Head
of
the
BVU-920
POSITION SENSO
(STRAIN GAUGE
{MORPH (CERAMICS)
DT PLAY BACK HEAD CHIP
Sette” =e
POSITION SENSOR |
(STRAIN GAUGE )
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