Pioneer CT-S250 - Manual (Page 8)

FRONT PANEL FACILITIES
FLEX (1/f) SYSTEM DOLBY NR & DOLBY HX PRO
• FLEX System: frequency Level ByDander System
This system automatically, compensates high and low frequency
level balance above 1 kHz according to the 1/f curve during
playback.
Generally, an envelope line of sound energy distribution of Hi-Fi
sounds corresponds statistically with the 1/f curve.
The 1/f curve indicates that if the frequency double, the level
decreases by approx, half of the original frequency level.
• During playback, the FLEX system automatically compensates
tapes with poor sound quality at high frequency levels of 1 kHz
and over, based on the appropriate auditory characteristics.
The FLEX system is designed to improve high frequency
reproduction in the 10 kHz range up to about 12 dB (MAX)
particularly in tapes with poor sound quality and sound matches
the 1/f curve, the FLEX system defeats compensation adjustment
automatically.
• When you press the FLEX button to turn the FLEX system on
and start playback, the BSSi) indicator flashes and compensation
adjustment begins.
Compensation adjustment takes approximately within 3 seconds
to complete. The indicator change from a flashing to a steadily
lit condition when the adjustment is completed.
• When the FLEX system is engaged, each music selection is
automatically adjusted during playback. System operation status
is indicated by the FLEX indicator flashing or steadily it.
Even when the FLEX system is turned on, the FLEX indicator is
nullified automatically during all recording functions including:
SUPER AUTO BLE tuning, CD»DECK synchro recording (CT-
S450S only), and tape copying.
NOTE:
When a tape has been recorded at a high frequency level above the
compensation level, FLEX system operation is automatically defeated
during playback.
SUPER AUTO BLE TUNING SYSTEM
(CT-S450S only)
With commercially available cassette tapes, sensitivity and frequency
characteristics might differ slightly from one another, even though
the same sound adjustment is set for them. To utilize tape
characteristics to the maximum possible and realize an ideal
recording which reproduces the source exactly, optimum recording
level (sensitivity) and equalizer values must be set accordingly for
each tape. In many conventional tape decks, standard values are
fixed for standard tapes, thus nullifying the subtle differences
between individual tapes. Perfect tuning by ear through use of fine
adjustment controllers for bias and sensitivity is difficult and requires
a lot of effort.
The SUPER AUTO BLE on this unit automatically adjusts bias, level
and equalizer by using a microprocessor to set the optimum
recording characteristics accordingly for each tape.
■ Dolby B/C-type NR Systems
Dolby NR systems are designed to reduce the amount of tape hiss,
mainly in the treble components. During recording, the high-pitched
pianissimo sounds which are most characteristic of audible noise
are boosted, and during playback, only these boosted sections are
attenuated, so that tape sound is returned to normal. As a result,
the noise is attenuated by an amount equal to the boosting in the
treble range. The Dolby B-type NR system reduces noise in the
treble range, cutting tape hiss and expanding the dynamic range.
The Dolby C-type NR system is even more effective in reducing
noise, as it cuts the noise from the mid-range and the treble range.
■ Dolby S-type NR System (CT-S450S only)
The Dolby S-type noise reduction system is effective at reducing
noise not only in the treble and mid-range frequencies, but in the
bass frequencies as well. In addition, maximum noise-reducing
effect is demonstrated not only in non-recorded parts of the tape
but in the recorded signal portions as well. The broad reduction of
noise modulation (bridging noise), freedom from dynamic side-effects
in the audible spectrum (signal modulation) and reduction of decoding
errors results in vastly improved sound quality.
NOTE:
When a tape has been recorded using the Dolby B-type, C-type or
S-type NR system, make sure that the DOLBY NR system is set to
the same position during playback by pressing the DOLBY NR
button.
■ The Dolby HX PRO Headroom Extension System
(CT-S450S only)
The Dolby HX PRO system controls the bias current during recording
and always keeps it at an optimal level according to the level of the
high frequency components of the music signal. It therefore provides
excellent recording quality even when recording signals from digital
sources
which contain a large amount of high-frequency
components. To guarantee optimal recording results, the HX PRO
system is activated automatically when recording begins. The Dolby
HX PRO system operates regardless of the setting of the Dolby NR
System switch. Furthermore, since this system affects the recording
quality itself, the clarity and high quality of the sound will be
maintained even when the tapes are played back on another tape
deck which does not contain the HX PRO Headroom Extension
System.
FUNCTION DISPLAY
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