Tascam DA-98HR User Manual download pdf (Page 46)

100

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 u in

TDIF-1 format.

It is also able to accept (and output) digital signals at

the

DIGITAL (AES/EBU) I/O connector p 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) u 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

Sine Oscillator

off

TDIF Word Length

16 bit

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 99 100

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Tascam DA-98HR User Manual Page 46

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