3 - System setup—CLOCK setup
3–2
If the Professional format is selected, the
resulting data output from the RCA STEREO
OUT jack will probably be unusable by most
domestic equipment.
3.1.2 Consumer options
If the chosen output is Consumer, hold down the
SHIFT
key and press the right switch of POD 4 to
change the SCMS (copy-protect) settings between
FREE
(SCMS disabled),
ONCE
(standard SCMS
one-generation) and
NO COPY
((copy-prohibit).
An appropriate message will appear on screen, and
these settings are stored in memory.
In addition, the category of consumer audio can be
set using the
SHIFT
key along with the left switch of
POD 4 to cycle through the following values:
This allows the TM-D4000 to pose as an alternative
audio source, for instance if an MD deck can only
accept signals from a CD or another MD deck, or in a
broadcast situation, a certain category may be neces-
sary for use with other equipment.
If an attempt is made to set the category with the Pro-
fessional format setting, an error message, “No Cate-
gory for AES/EBU” will appear on screen.
3.1.3 Word length and dithering
The word length can be selected as being either
16
,
20
or
24
bits in length.
If the selected word length is less than 24 bits, you
may choose to dither the resulting output. Dithering
helps to reduce quantization noise, but results in a
slightly lower signal-to-noise ratio. Choose either
OFF
, rectangular (
RECT
) or triangular (
TRI
)
dithering. The shape names refer to the probability
distribution of the noise which is used in the dither-
ing process.
Typically, triangular dithering gives better quantiza-
tion noise reduction than rectangular, but the signal-
to-noise ratio is not as good.
NOTE
The word length from the output busses is
always set to 24 bits.
3.2 CLOCK setup
WARNING
There should be one, and only one, word
clock source in a digital audio setup. Multiple
word clocks in a setup may result in noise
which can damage monitoring equipment
(speakers and amplifiers).
The word clock source is selected in the following
way:
1
With the
SHIFT
indicator unlit, press the
DIGITAL I/O
key until the screen below is
shown (note that the exact screen may differ
from that shown here, depending on the
number and the type of the interface cards
fitted in the expansion slots):
2
Move the cursor to the box which contains
the description of the desired clock source.
General
General
CD
CD
LD
Laser (usually disc)
MD
MD
CODEC
PCM Codec
MIXER
Mixer
a
a. TM-D4000 default setting
SRC
SRC (Sample Rate Converter)
SAMPLER
Sampler
DAT
DAT
DVTR
DVTR
DCC
DCC
TV-J
Japanese broadcast digital
TV-EUR
European broadcast digital
TV-USA
American broadcast digital
TV
Broadcast digital
Synth
Synthesizer
Microphone
Microphone
Pro A/D
Copy-free A/D converter
A/D
A/D converter
RAM
Solid state reproducer
