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Idiomas disponibles
Idiomas disponibles
DOLBY HX PRO
Dolby HX Pro is an "active bias" technique
that can improve the quality of audio tape
recordings. High-lével high frequencies can
be recorded
more
accurately,
without
sacrificing the signal-to-noise ratio, while
such side effects of tape saturation as
distortion are reduced
What Is Bias?
Bias is a very high-frequency
signal
generated within a tape deck and recorded
on the tape simultaneously with the program
material. This inaudible signal allows low
noise, low distortion recording and a flat
frequency response. Different magnetic tape
formulations require different amounts of bias
for optimum performance. If the bias level is
too high, the high-frequency Maximum
Output Level (MOL) decreases.
The Problem of Self-Bias
Unfortunately, the bias level is often
influenced by the signal being recorded. The
high frequency components of some music
act as bias. This unpredictable source of bias
is added to the existing bias, resulting in a
loss of high-frequency response. As the high-
frequency contents of the signal increase,
the ability of the recorder to record high
frequencies
(MOL)
decreases.
This
phenomenon is called self-biasing.
The Dolby HX Pro Solution
Dolby HX Pro monitors the high-frequency
contents of the program and adjusts the
tecorder's bias oscillator to maintain a
constant total bias level. The result is
improved high-frequency response and lower
distortion. Depending on the type of tape,
the improvement
in headroom
(dynamic
Tange) can be 6 dB or more.
The Benefits
With Dolby HX Pro, it is easier to make more
accurate recordings of music which contains
high-level high frequency components. The
improvement is similar to that of high-
performance tape over conventional tape,
and regardless of the type of tape used, the
Tesults will sound better.
Most important of all, Nolby HX Pro requires
no decoding process.
Once a tape is
recorded with it, the improvement will be
realized when playing the tape back on any
machine,
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Example of improved frequency response
using Dolby HX Pro
SPECIFICATIONS
Track System:
4-Track, 2-Channel Stereo
Heads: 4; 1 Erase and 1 Record/Playback
(Rotary, DECK I/il)
Type of Tape:
Cassette tape C-60 and C-
90 (Philips type)
Tape Speed: 4.76 cm/sec (1-7/8 ips), 9.5
cm/sec
(3-3/4 ips) (High speed
dubbing only)
Motors:
4; 2 DC servo motors, 2 DC
motors (2 each deck)
Wow and Flutter (WRMS): 0.06 %
Frequency Response (Overall, -20 dB):
25 — 19,000 Hz, Metal tape
25 — 18,000 Hz, CrOz tape
25 — 17,000 Hz, Normal tape
Signal-to-Noise Ratio (Overall):
59 dB (NR off, 3% THD
level,
Weighted)
69 dB (Dolby B NR On, over 5 kHz)
79 dB (Dolby C NR On, over 1 kHz)
Fast Winding Time: Approximately 110
seconds for C-60
Inputs: Line; 87 mV, 50 k ohms
Mic;
0.35 mV, 200 ohms
Outputs: Line; 0.46
V for load impedance of
50 k ohms or more
Headphones; 8 ohms
Power Requirements:
120/230 V AC, 50/60 Hz, 27 W
(General Export model)
120 V AC, 60 Hz, 25 W
(U.S.A./Canada model)
230 V AC, 50 Hz, 27 W (Europe
model)
240 V AC, 50 Hz, 25 W
(U.K/Australia model)
Dimensions (W x H x D): 435 x 147 x 325
mm (17-1/8"
x 5-13/16" x 12-1316")
Weight (net): 6.7 kg (14-6/8 Ibs.)
Standard Accessories: Wireless Remote
Control Unit (RC-425), Batteries
(SUM-4, "AAA", "R03" type) x 2,
Input-output
connection
cords,
Owner's manuel
© Specifications were determined using
metal tape except as noted.
® Improvements may result in specification
or feature changing without notice.
Photos and illustrations may differ slightly
from production models.
This unit incorporates microcomputers and
when it is turned on for the first time, it may
not operate correctly because of external
noise, etc. In such a case, turn the POWER
switch OFF, then disconnect the power plug
from the wall outlet, and allow for approx.
one minute before turning it ON again to
restart operations from the beginning.
—14—
SOMMAIRE
lilustrations de référence ....
Caractéristiques et commande:
Précautions a observer
Raccordements
Télécommande .
Fonctionnement
Lecture ......
Lecture avec la Platine | ou |
Utilisation de la commande de
vitesse PITCH CONT
(Platine | seulernent)
Lecture continue .....
Fonction de balayage des
DIANCS ......ssseeses
Fonction CPS (recherche
informatisée de
programme)
Fonction RTZ
(retour a zéro)
Enregistrement ..
Enregistrement (a partir des
bornes LINE IN) avec la
|
Platine ! ou II
Effacement ..
|
Enregistrement silencieux
Enregistrement mixage
Hy
A l
MIC/LINE ....
Enregistrement mixage
Fonction ARLS (Systeme
automatique de réglage du
niveau d'enregistrement) ..... 21
Fonction de contrdle CD (CD
CHECK)
Fonction de fondu a
l'ouverture/fermeture ......... 2
Copie synchro CD (Platine 1]
seulement) ...
Enregistrement continu
(Platine | vers Platine II)
Enregistrement paralléle .
Copie (Copie de la Platine |
vers la Platine Il
Copie normale
Copie avec inversion
synchronisée
Fonctionnement contrélé par
minuterie
Enregistrement par
minuterie .....
Lecture par minuteri
Entretien ...
Dolby HX Pro.
Caractéristiques techniques
CARACTERISTIQUES ET
COMMANDES
@ Interrupteur d'alimentation
(POWER)
@ Porte-cassette
© Touche d'enregistrement
(RECORD)
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