What Is The Md - Sony MZ-B3 Operating Instructions Manual

Optional accessories
AC-E45HG AC power adaptor
LIP-12 Lithium ion rechargeable battery
ACP-MZ60A* AC Power adaptor/
Battery charger
ECM-909A, ECM-727P, ECM-717 Stereo
microphones
ECM-T140, ECM-T110 Monaural
microphones
MDR-E747, MDR-E535 Stereo dynamic
earphones
MDR-D55, MDR-D33 Stereo headphones
RK-G134, RK-G128 Line cables
MDW-74/74A, MDW-74L/74R/74Y,
MDW-60/60A Recordable MDs
CK-MD4 MiniDisc carrying case
CK-MD10 MiniDisc filing box
* ACP-MZ60A can only be used as a
battery charger. It cannot be used as an
AC power adaptor with this recorder.
Your dealer may not handle some of the
above listed accessories. Please ask the
dealer for detailed information about the
accessories in your country.
US and foreign patents licensed from
Dolby Laboratories Licensing
Corporation.
Design and specifications are subject to
change without notice.
38

What is the MD?

How MiniDiscs work
MiniDiscs (MD) come in two types:
premastered (prerecorded) and
recordable (blank). Premastered MDs,
recorded at music studios, can be
played back almost endlessly.
However, they can't be recorded on or
over like cassette tapes. To record, you
must use a "recordable MD".
Premastered MDs
Premastered MDs are played like
regular CDs. A laser beam focuses on
the pits in the surface of the MD and
reflects the information back to the
lens in the recorder. The recorder then
decodes the signals and plays them
back as music.
Recordable MDs
Recordable MDs, which use magneto-
optical (MO) technology, can be
recorded again and again. The laser
inside the recorder applies heat to the
MD, demagnetizing the magnetic layer
of the MD. The recorder then applies a
magnetic field to the layer. This
magnetic field corresponds exactly to
the audio signals generated by the
connected source. (The north and
south polarities equate to digital "1"
and "0".) The demagnetized MD
adopts the polarity of the magnetic
field, resulting in a recorded MD.
SONY MZ-B3 (E) 3-798-610-22(1)