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INTRODUCTION
Thank you for selecting the Marantz Model PMD520 3-head In-
dependent Dual Well Cassette Deck.
Please read these operating instructions carefully. We recom-
mend that you read the entire user guide before you connect or
operate the unit.
After you have reviewed the contents this manual, we suggest
that you make all system connections before you attempt to
operate the unit.
Refer to the Figures on Pages 54 – 57 of this user guide.
The callout numbers on the Figures correspond to those found
in the text. All references to connections and controls are printed
in BOLD type, as they appear on the unit.
PRECAUTIONS
The following precautions should be considered when operat-
ing the equipment.
When setting the equipment ensure that :
– air is allowed to circulate freely around the equipment
– the equipment is on a vibration free surface
– the equipment will not be exposed to interference from an
external source
– the equipment will not be exposed to excessive heat, cold,
moisture or dust
– the equipment will not be exposed to direct sunlight
– the equipment will not be exposed to electrostatic discharges
¡ In addition, never place heavy objects on the equipment.
¡ If a foreign body or water does enter the equipment, contact
your nearest dealer or service center.
¡ Do not pull out the plug by pulling on the mains lead. Hold
the plug.
FEATURES
¡ COMPLETELY INDIVIDUAL DUAL SYSTEM
Well A and Well B can be controlled independently for both
recording and playback. There are two sets of inputs and
outputs which allow for many modes of recording and play-
back. Two separate input sources can be recorded simulta-
neously and independently on the two decks; two different
tapes can be played back simultaneously on the two decks;
and lastly, it is possible to play a cassette on one well, and
record a different source (such as a mixer) on the other well
simultaneously.
There are also several modes in which the two decks work
together.
¡ CONTINUOUS RECORDING AND PLAYBACK
In the continuous mode, Well A will play (or record) side one,
and then automatically switch to Well B, which will play (or
record) side one. In this way 1-1/2 hours of uninterrupted
playback or recording is possible using C-90 cassettes.
¡ CASCADE CONNECTION FOR SERIAL CONNECTION OF
MULTIPLE UNITS
By connecting several PMD520s in series by way of the cas-
cade connection, multiple units can play or record continu-
ously for logging and other long-time recording applications.
In this case, Wells A and B of unit #1 will play (or record) as
in the example above, then they will trigger the start of con-
tinuous playback (or record) of unit #2, and so on.
¡ OVERLAP SERIES RECORDING
This feature records long events such as a conference, with-
out interruption. The recording of the next tape starts when
the remaining time on the previous tape is approximately 3
minutes.
¡ PARALLEL RECORDING (DUPLICATION)
When multiple copies of the same source are required, it is
possible to record both Well A and Well B simultaneously, in
parallel, from a single source.
¡ TIMER REC/PLAY
Time-activated playback and recording are available using
a commercially available timer.
¡ FINE SPEED CONTROL
Each Well features ±3% speed control.
¡ METERS AND LINEAR TIME TAPE COUNTERS
Each Well features independent FL bargraph meters, and a
linear time (minutes and seconds) counter. The display on
these counters is only an approximate indication of minutes
and seconds and its accuracy depends on the match be-
tween the Tape and the correct TAPE TIME setting.
¡ TAPE STOP ALARM
A buzzer sound is generated to indicate the end of tape af-
ter playback or recording.
¡ DOLBY B/C NR SYSTEMS
The Dolby NR (Noise Reduction) systems compress and am-
plify signals during recording in order to raise the signal-to-
noise ratio on the tape. During playback, these signals are
expanded and attenuated by the same amount in order to
regain the original dynamic range of the music. An additional
result of this expansion and attenuation is that the noise floor
of the recording is reduced significantly. Dolby B typically
reduces noise by 10 dB, while Dolby C typically reduces
noise by 20 dB.
¡ DOLBY HX PRO HEADROOM EXTENSION
The Dolby HX PRO system monitors the total amount of ef-
fective bias during recording and instantaneously compen-
sates for any excess bias by reducing the deck’s bias signal
level accordingly.
The system operates independently on each channel. HX
PRO is unlike a noise reduction system because it functions
only during recording and no decoding is required. There-
fore, a tape recorded with the HX PRO system can be played
back on any other cassette deck while retaining the benefits
of HX PRO.
Dolby noise reduction and HX Pro headroom extension are
manufactured under license from Dolby Laboratories Licens-
ing Corporation. HX Pro originated by Bang & Olufsen.
“DOLBY” the double-D symbol and “HX PRO” are trademarks
of Dolby Laboratories Licensing Corporation.