Glossary, Bias calibration, Dolby hx pro system – Sony TC-KA1ESA User Manual
Page 13: Dolby nr inoise reduction) system, Mpx filter, Multi-ams, Recording level calibration, Fet input pb amplifier, Tape counter, Test tones
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Autumatic Selection. The tape deck aulomAticallv iVts
the appropriate equ.'tlization characteristics and bias current
according to the tape type inserted in the deck.
Adivtstmcntlor optimum recording. You can get belter
Tecordirtg results with minimum distortion and tlM
frequency response by adjusting the bias current to the
appreciate level. Lowering the bias current can boost high-
frequency response, but also cause higher distortion. On the
other hand, raising the bias current con minimize distortion,
but also reduce high-frequency response. To balance both
the bias current and high-frequency response, it is necessary
to adjust the bias current appropriately.
Howet'er, to suit your taste, you can also adjust the bias
current as vou want.
Dolby HX PRO system
DistM’tirm and noise reduction system. The Dolby MX PRO
system reduces distortion and noise in high-frequency
respoase while recording. A tape recorded with this system
brings the some high-quality M>und even when you play the
tape on the other tape decks.
Dolby NR Inoise reduction) system
.Voisv ri\iuctii>n system for eliminating hissing noise. The
Dolby N'R system boosts the liuv-levcl .signals in high
fre^juency during reconting and restores them during T
Tho'e ate 4 types* in the Dolby \R system; A. R, C and S
A-type is for professional use (not available tm this tape
decki, and B. C and S-tvpes are for consumer ctse. S-lype has
the nuiximum noist.' retluction capiibilitv. folttm(*d bv C an*t
Multiplex niter. A Alter for eliminating the ]9-kHz stereo
carrier and the 38-kHz sub-carrier signals that may impair
the Dolby NR system. Usually the tuner has an MPX filter.
If you cannot gel a satisfying result when recording FM
broadcasts with Dolby NR system, your tuner does not have
a hlter or the filter is rtot working. In this case, turn the
DOLBY NR switch countercoickwise to the position you
want (B. C, or S with .MPX FILTER).
Multi-Automatic Music Sensor is a function that locates the
beginning of up to 30 tracks before or after the current track
by detecting a blank spare (of over 4 seconds) between
Recording level calibration
Adjustment for optimum recording. Even when you have
adjusted the recording le\'el correctly, the playing level
might turn out to be low depending on the tape used. By
.idju.«ling the recording level calibration, you can
compensate for the low recording level. When you record
on a tape with the Dolby NR system, this function works
FET input PB amplifier
Ibe FI- r input PB amplifier is a l ircuit that is }H*silioned
beuetvn the playing he.nl and the op«'rational amplifier.
Unlike conventional amplifier circuits, which requite a low
noise, mi-ilium-quality o|vr.iiionai amplifier becau.se of il.s
dinvt link with the playing head, the noise-free .signal that
the I- FI input PR amplifier provid«*s eruibles the u.st* of a
lujUter quality iqs-TAtivMv^l amplifier, .uvl more natural
Nt>undiiig out pot.
A display element that shows the elapsed recording or
playing lime as a digital readout. Since the counter is mu .t
digital ckH-k, the displayed value will differ slightly from
the actual elapsed recording or playing lime. The counter
v.ilue also includi-s the lengtli *U the leader tape.
l.^-kHz, t-kHz ami 400-Hz signals produc»\l by the tape
deck when you do the bias and recording level calibration.