Harman Kardon TD262 Owners Manual - Page 6

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Dolby noise reduction is an extremely effective method of reducing background hiss on tapes. The TD262 and TD212 incorporate both Dolby B and Dolby C circuitry. Dolby B reduces tape hiss by about 10dB. Dolby C is approximately twice as effective as Dolby B, reduces noise over a wider frequency band and improves overall high-end tape response. When pressed, the NR (24) button engages the Dolby B & C noise reduction systems. The TYPE (25) switch selects the noise reduction system to be used for recording or playback. NR BUTTON OFF ON ON TYPE BUTTON NO EFFECT OUT IN RESULTS NR OFF DOLBY B DOLBY C COMMENTS • For playback of tapes which have not been encoded with Dolby B or C NR'. • For playback of tapes recorded with Dolby B2. • During recording, encodes the tape in Dolby B. • For playback of tapes recorded with Dolby O. • During recording, encodes a tape in Dolby C. 1. A Dolby-encoded tape played back without noise reduction decoding will sound "bright" due to boosted treble frequencies. 2. A tape which has not been recorded with Dolby NR, will sound muffled and "dull" when played back with noise reduction decoding on. 3. Unsatisfactory sound will result if you attempt to play back a tape recorded in Dolby C while the TYPE button is set to Dolby B, and vice verse. *Dolby noise reduction and HX Pro headroom extension manufactured under license from Dolby Laboratories Licensing Corporation. HX Pro originated by Bang & Olufsen. "DOLBY", the double-D symbol DO and "HX PRO" are trademarks of Dolby Laboratories Licensing Corporation. 6 This circuit is an input filter which should only be used when making cassette recordings of FM broadcasts while employing Dolby B or C noise reduction. Special inaudible signals that are part of FM stereo broadcasts can interact with Dolby NR to cause audible interference and distortion which are noticeable only during playback after it is too late to correct. Always set the MPX FILTER (26) button to its ON position when making Dolby-encoded recordings from FM. The circuit has no effect during playback. Press this switch to turn the power to your TD262 / TD 212 on. Press again to turn the power off. The Harman Kardon TD262 includes special Dolby HX Pro circuitry. This is NOT a noise reduction circuit. Nor is it a "record/playback" system which requires separate encode and decode circuits. Its purpose is to gain even more high frequency performance out to tapes you record. Even though your TD262 may be set to the optimum bias for a tape (using the BIAS/EQUALIZATION and BIAS FINE TRIM controls), extremely high treble signal levels can still cause the bias to momentarily overload, causing audible signal degradation and distortion. Until Dolby HX Pro was developed, the only alternative was to reduce overall input signal levels, which potentially increases signal-to-noise ratios.

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Dolby
noise
reduction
is
an
extremely
effective
method
of
reducing
background
hiss
on
tapes.
The
TD262
and
TD212
incorporate
both
Dolby
B
and
Dolby
C
circuitry.
Dolby
B
reduces
tape
hiss
by
about
10dB.
Dolby
C is
approximately
twice
as
effective
as
Dolby
B,
reduces
noise
over
a
wider
frequency
band
and
improves
overall
high
-end
tape
response.
When
pressed,
the
NR
(24)
button
engages
the
Dolby
B
&
C
noise
reduction
systems.
The
TYPE
(25)
switch
selects
the
noise
reduction
system
to
be
used
for
recording
or
playback.
NR
BUTTON
TYPE
BUTTON
RESULTS
COMMENTS
OFF
NO
EFFECT
NR
OFF
•
For
playback
of
tapes
which
have
not
been
encoded
with
Dolby
B
or
C
NR'.
ON
OUT
DOLBY
B
•
For
playback
of
tapes
recorded
with
Dolby
B
2
.
•
During
recording,
encodes
the
tape
in
Dolby
B.
ON
IN
DOLBY
C
•
For
playback
of
tapes
recorded
with
Dolby
O.
•
During
recording,
encodes
a
tape
in
Dolby
C.
*Dolby
noise
reduction
and
HX
Pro
headroom
extension
manufactured
under
license
from
Dolby
Laboratories
Licensing
Corporation.
HX
Pro
originated
by
Bang
&
Olufsen.
"DOLBY",
the
double
-D
symbol
DO
and
"HX
PRO"
are
trademarks
of
Dolby
Laboratories
Licensing
Corporation.
1.
A
Dolby
-encoded
tape
played
back
without
noise
reduction
decoding
will
sound
"bright"
due
to
boosted
treble
frequencies.
2.
A
tape
which
has
not
been
recorded
with
Dolby
NR,
will
sound
muffled
and
"dull"
when
played
back
with
noise
reduction
decoding
on.
3.
Unsatisfactory
sound
will
result
if
you
attempt
to
play
back
a
tape
recorded
in
Dolby
C
while
the
TYPE
button
is
set
to
Dolby
B,
and
vice
verse.
This
circuit
is
an
input
filter
which
should
only
be
used
when
making
cassette
recordings
of
FM
broadcasts
while
employing
Dolby
B
or
C
noise
reduction.
Special
inaudible
signals
that
are
part
of
FM
stereo
broadcasts
can
interact
with
Dolby
NR
to
cause
audible
interference
and
distortion
which
are
noticeable
only
during
playback
after
it
is
too
late
to
correct.
Always
set
the
MPX
FILTER
(26)
button
to
its
ON
position
when
making
Dolby
-encoded
recordings
from
FM.
The
circuit
has
no
effect
during
playback.
Press
this
switch
to
turn
the
power
to
your
TD262
/
TD
212
on.
Press
again
to
turn
the
power
off.
The
Harman
Harman
Kardon
TD262
includes
special
Dolby
HX
Pro
circuitry.
This
is
NOT
a
noise
reduction
circuit.
Nor
is
it
a
"record/playback"
system
which
requires
separate
encode
and
decode
circuits.
Its
purpose
is
to
gain
even
more
high
frequency
performance
out
to
tapes
you
record.
Even
though
your
TD262
may
be
set
to
the
optimum
bias
for
a
tape
(using
the
BIAS/EQUALIZATION
and
BIAS
FINE
TRIM
controls),
extremely
high
treble
signal
levels
can
still
cause
the
bias
to
momentarily
overload,
causing
audible
signal
degradation
and
distortion.
Until
Dolby
HX
Pro
was
devel-
oped,
the
only
alternative
was
to
reduce
overall
input
signal
levels,
which
potentially
increases
signal-to-noise
ratios.
6