Sharp MZ-350C Service Manual page 57

M Z 3500
2) VFO Circuit configuration
READ
DATA"* -fr
h
Phase
detector
Filter
amptif ier
^
VCO
Window
U
Data
Separator
^SEPARATED DATA
— * SEPARATED CLOC
The VFO Circuit has the following capabilities.
(1) T wo modes: MFM and FM.
(2) The VFO Circuit Operation is suspended during the
SYNC field located before the ID field and data field.
(3) After suspention, the VFO Circuit will synchronize
with the read data (timing is affected by a speed
change in the FDD). Fluctuations in an individual bit
that may be seen (peak shift are ignored.
VFO Circuit
4-5V READ DATA
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