Adjusting The Recording Level; Cassuhls Cave 0; What Is The Dolby Hx Pro System - Sony TC-C521 Operating Instructions Manual

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Adjusting the Recording Level
The optimum recording level, which differs according to the
tape type, is indicated on the PEAK LEVEL METER for each
tape type.
Adjust the REC LEVEL control as high as possible without
exceeding the recommended range for the tape type being
used.
Recommended maximum PEAK LEVEL METER reading
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for Type | (normal) or
Type Il (CrO2)tape
Type IV
(metal) tape
Tips on recording level adjustment
« If the recording level setting is too high, the recording will
be distorted; if it is too low, the tape will produce a hissing
sound. Therefore, the recording level should be set as high
as possible without causing distortion.
« If the program source to be recorded has many high
frequency signals, set the level to a relatively low position.
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To recover a cassette for
recording
Cover the respective slot with
tape.
To protect a recording on
side A or B
Break out the respective tab.
Side A
Tab for
side B
When using Type Il (CrO2) or Type IV (metal) cassettes
Be careful not to cover the detector slots which are necessary for
automatic tape detection.
Type I! (CrOz)
Type IV (metal)
Detector slots Detector slots
Cassette care
« Avoid touching the tape surface of a cassette to prevent
contamination of the heads by dirt, dust, or oil on the skin.
« Keep cassettes away from equipment with magnets, such
as speakers and amplifiers, as erasure or distortion on the
recorded tape could occur.
* Do not expose cassettes to direct sunlight, extremely cold
temperatures or moisture.
18
Note on cassettes longer than 90 minutes
The use of cassettes longer than 90 minutes is not
recommended except for long continuous playback.
What is the Dolby HX PRO System?
The Dolby HX PRO system provides improved linearity in
high-range frequency response during recording. Tapes
recorded with this system retain the same high quality even
when played back on other tape decks.
315 Hz
Distortion 6.3 kHz
output \
\ 10 kHz
315 Hz distortion
Bias current ———® High
Established bias current
As shown above, characteristics such as output level and
distortion differ widely according to the bias (high-frequency)
current. In conventional systems, the bias current is
susceptible to variations in certain recording signals (see
diagram below) which may cause fluctuations in frequency
response, distortion, or other unwanted characteristics.
Fluctuation
Frequency ——* High
With the Dolby HX PRO system, the effective bias amount
added to the bias current is controlled in millisecond units to
greatly reduce distortion, improving linearity in high-range
response and ensuring high-intensity recording with minimal
distortion and noise.