7 – Advanced operations–Sine oscillator
46
TASCAM DA-98HR
1
Move the cursor to the
Release
parame-
ter and use the
§
and
¶
keys to select between
Slow
,
Medium
and
Fast
.
7.9
Sine oscillator
The DA-98HR incorporates a digital oscillator for
lineup and signal tracing purposes. This oscillator is
a sine-wave oscillator at either the standard tuning
frequency of 440Hz or the standard tape line-up fre-
quency of 1kHz.
The oscillator signal level is at the nominal signal
level of +4dBu (but note that since the oscillator is a
constant sine wave, it cannot truly be compared with
“real-world” transient signals).
To operate the oscillator:
1
Enter menu 2, move the cursor to
Sine
Osc.
and press
ENTER
:
2
Use the
§
and
¶
keys to turn the oscillator
between
off
,
440 Hz
and
1 kHz
.
When the oscillator is turned on, it overrides
all other track inputs.
NOTE
When using the oscillator, you should turn down the moni-
tor levels in the control room and studio to avoid damage to
your ears (and the speakers).
7.9.1
Recording the oscillator
As mentioned above, the oscillator overrides all other
track inputs, regardless of whether tape, digital or
slot board input has been selected.
Recording the oscillator test tone is therefore similar
to any other recording operation (arm the appropriate
tracks and record).
7.10
Digital recording
The DA-98HR is able to accept (and output) digital
signals at the
TDIF-1 (DIGITAL I/O)
connector
TDIF-1 format.
It is also able to accept (and output) digital signals at
the
DIGITAL (AES/EBU) I/O
connector
in AES3-
1992 Amendment 3-1999 format.
Consult your TASCAM distributor dealer for details
of other interface units or optional slot boards for the
DA-98HR which allow connection to other equip-
ment (e.g. the IF-88SD which allows conversion
between SDIF-2 and TDIF-1 formats).
The DA-98HR should be connected to other TDIF-1
equipment using a PW-88D or PW-88DL connector
cable.
NOTE
Only use TASCAM digital cables when making digital audio
connections to the DA-98HR. Other types of cable may
cause damage to the system, and the warranty will be
voided if such damage is caused by use of the wrong
cables.
Make sure that the DA-98HR’s word sync clock mas-
ter or slave setting is correctly made when it is con-
nected to other digital equipment. There can only be
one word clock master in a setup.
Since the TDIF-1 format carries a word clock as part
of the interface, there is no need to make a word
clock connection when recording through the
DIGI-
TAL I/O
connector if the TDIF-equipped devices are
the only digital audio devices in the setup. If there are
other digital audio devices present, make sure that
the word sync clock is properly setup throughout the
device chain.
7.10.1 Selecting different inputs for
recording
See the section 6.3.3, “Selecting input sources” for
details of the input patchbay.
7.10.2 Selecting input word length
When data is transferred into the DA-98HR through
the
TDIF (DIGITAL I/O)
connector, the word
length of the incoming data must be set. This can be
selected from between 16-bit, 20-bit or 24-bit. To set
the word length:
1
Select menu 2, move the cursor to
Word
Len.
, and press
ENTER
:
2
Use the
§
and
¶
keys to change the value
between
16
,
20
and
24
bits.
We suggest that you experiment with the dither set-
tings (7.12, “Dither”) if you find you are recording
quantization noise at low levels when the input word
S i n e
O s c i l l a t o r
o f f
T D I F
W o r d
L e n g t h
1 6
b i t
