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Bias adjustment function
When
recordings are made with the same
recording level into
same type (but different brands) of tape, (regular or "normal" tape,
for example), you may notice that the reproduced high-frequency
sound is different from one tape to an other.
The reason that such differences may be noticed is because there
are differences in the frequency response (particularly in the treble
range)
between
cassette
tapes
of the various
manufacturers.
Although a noise-reduction
system
is used the recording and
playback processes at the same recording level, a difference of the
frequency response will result in the processes of recording. Such
a problem cannot be corrected in conventional recording system.
In order to overcome
this problem,
this unit includes
a bias-
adjustment control (for compensation of the frequency response)
so that the most appropriate recording can be made.
Level
T
(dB)
Adjusting the bias current, the high-frequency range is
compensated.
+3
-3
1k
Frequency (Hz)
During recording
1
Make
a recording
as explained
in steps
1
through
12 of "Recording".
(Refer to page
11.)
2
While the switching back and forth between
the original sound source and the recorded
source
by using the input selector on the
system amplifier, adjust the bias-adjustment
control so that the treble tone quality is the
same.
It may be helpful, as a reference, to adjust the bias during
between-station noise heard on the FM band. The adjustment
will be made more precisely by listening through headphones.
Connect
the headphones
to the headphones
jack of the
amplifier.
Bias becomes
.
2
Bias becomes deeper;
shallower; the treble
= =
=
the treble characteristic
characteristic
oN
YL
decreases.
increases.
bias adjust
3
After repeating the above steps if necessary,
rewind the tape and then begin the recording
again.
Notes:
Normal
TDK AD, SONY HF, That's RX,
AGFA LNX
CrO2
TDK SA, SONY UX, maxell XLII,
Fuji FR-II, DENON HD6, That's EX,
BASF Chrome Extra II, MEMOREX
CRII
Normal
maxell UR, Fuji DR,
BASF LH, MEMOREX dBSI
CrO2
Scotch XSI],
AGFA CRX
CrO2
SONY UX-S
Seg
bide adjust
Note:
*Pilot signal
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