Dual C 810 Bedienungsanleitung Seite 12

DOLBY NR/MPX filter
The Dolby noise reduction system gives a lasting reduction of
the inherent tape noise and thereby increases the dynamic range
of the recording.
To play cassettes that have been recorded with the Dolby system
and which have the Dolby trademark 00, or Dolbyized recor-
dings you have made yourself as described in page 14, operate
the switch marked OO-MPX (15). The built-in Dolby system
then works automatically and needs no special adjustment
when used in conjunction with tapes listed on the page 27 or
their equivalents.
The DOLBY NR switch is coupled with the MPX filter; bij this
means disturbing high frequencies during tape recording of VHF
Programs is filtered out.
Select the correct switch position in accordance with the follo-
wing table.
Switch Dolby-Nr. | MPX-filter Recording source
Top On On VHF radio
Center Off Off
Bottom On Off Records
Index Counter
The index counter (16) is a convenient means of noting and
quickly locating specific spots on a recorded tape. It functions
during recording, playback and fast winding in any direction.
It is good practice to set the index counter reset knob (12) to
"000" at the beginning of each tape. If you note the number
on the index counter at the beginning of a particular selection
you can later quickly find all the selections on a particular cas-
sette
Inserting and removing cassettes
Thanks to the unique cassette holder (DLLS) the cassette can
be directly inserted. Hold the cassette in such a manner that
the tape faces downwards, insert the cassette top-edge first and
pivot it downwards to a vertical position until it clicks into
place (Fig. 2). The cassette removal is every bit as easy and can
be done at any stage of operation. The two STOP keys (2) cause
the tape movement to be stopped and the tone heads to be
retracted whenever the cassette is removed. In this way, no
separate stop key is necessary.
Fast forward and reverse
»» (9) fast wind from left to right
44 (5) fast wind from right to left
The functions "fast forward" pp and "fast reverse" «4 are used
to find particular points on the tape.
The device switches off automatically at tape end. Pressing the
keys "fast forward" for "fast reverse" cancels the functions start
» (7) and RECORD (4).
Start
Recording and replay are initiated by means of the » (7) button.
PAUSE
The PAUSE button (10) is used for preparing to record and
stop for brief interruptions in recording playback. The function
you have selected is maintained when the pause button is de-
pressed.
Pressing the pause button once more returns the equipment to
the preceding mode of operation.
Auto Stop
The equipment contains a electrical tape monitoring device
which initiates the auto stop. This unit functions independently
of tape foil and cassette. If operational defects such as jammed
cassettes occur, the unit automatically switches off the drive.
4
Monitoring with Headphones
The "PHONES" jack (22) may be used for stereo headphones
with an impedance of 4 — 2000 Ohms, for monitoring on both
record and playback
Making your own cassette recordings
In addition to the notes previously given for playback, the fol-
lowing points should be observed for recording:
* Set the tape selection switch (13) according to the type of
tape used
* Switch on DOLBY NR (15); if necessary switch on MPX
filter.
* Set the counter (16) to "000"
Recording preparation and recording level setting
Press the PAUSE (10), RECORD (4) and » (7) keys in that
order. The RECORD key must be held depressed until the
arrow key has been pressed. The record light (20) will show
the unit is ready for recording.
Using the input selection switch INPUT (17) select the desired
input source:
MIC Microphone
DIN Radio or record through the DIN jacks
LINE Radio or record through the Cynch jacks
Modulation of the tape recording is by means pf the pair of
regulators (19). Both stereo channels can be adjusted separately —
but also together by means of the slip clutch. The correct level
of modulation can be checked with the modulation instrument
(18). The quasi peak value display permits optimum tape recor-
dings
Recording is correctly modulated if, during the loudest passages
of the program, the indicator deflects just as far as the O dB
mark (beginning of the red range). Brief overshoot of the 0 dB
mark does not affect the recording quality.
If the recording level has been set too low, the full dynamic
range of the tape is not being utilized. Overloading can produce
audible distortion
Starting and Recording
When the PAUSE key (10) is pressed again tape movement
commences and the recording is started. Recording may be
started without the use of the PAUSE key, but this is not re-
commended. For immediate starting of the recording mode (4)
the record key must be kept depressed until the » (7) key has
been depressed.
The points to be borne in mind when recording from the various
sources are detailed in the following sections.
Copying from Records
There are two ways in which the turntable can be connected
to the unit:
1. Connect both the turntable and cassette deck to stereo am-
plifier or receiver and switch the program selector switch of
the receiver (amplifier) to PHONO.
2. To connect the turntable directly to the cassette deck proceed
as follows:
Plug an adapter cord (Part No. 226 818) into the DIN REC/PB
jack and connect it to the turntable. For a player with a
piezo electric (ceramic or crystal) cartridge this is all that is
required. For a turntable with a magnetic or dynamic cartrid-
ge a preamplifier is required such as Dual TVV 47.
Recording Broadcasts
If the cassette deck and a tuner/receiver are connected to a
HiFi amplifier, you can record audio programs without changing
of the cable connections.
If you should wish to connect a tuner or radio directly to the
cassette deck, this can be done by way of the "DIN REC/PB"
jack using the adapter cord (Dual Part No. 226 818).
Recording from Another Recorder
If you wish to record on your cassette deck from another tape
recorder or cassette recorder, plug the adapter cord (Part.No.
226 818) in the DIN REC/PB socket of your cassette deck and