Tascam Interface Format Converter IF-TAD Owners Manual

							 
 IF-TAD Interface 
TASCAM IF-TAD Ð 
11
WARNING
Note that you should always use genuine TASCAM 
cables, or cables which have been approved for use 
with TDIF-1 interfaces by TASCAM.
Although these cables appear similar to certain types 
of computer cables and use similar connectors, the 
cables themselves are very different, and the different 
electrical characteristics of the cables can cause dam-
age to the equipment connected with the wrong 
cables.
If the use of cables other than TASCAM cables causes 
or results in damage, the warranty is voided.
4TDIF-1 indicator
This indicator lights orange when a valid DTRS signal is received 
at the TDIF-1 connector.
If this indicator is not lit, it means that the unit has become discon-
nected, or is not switched on.
If the indicator is ßashing, it means that both units (the TDIF-1 
and the adat device) have been selected as the clock master, or 
both have been selected as the clock slave. Make sure that one unit 
is selected as the word clock master, and the other as the word 
clock slave.
5adat IN and OUT connectors
Use these connectors to make the appropriate connections 
(IF-TAD IN to the adat deviceÕs optical OUT and the IF-TAD 
OUT to the adat deviceÕs optical IN). Use only optical audio 
cables as recommended by the manufacturer of the adat device. 
						

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12 Ð TASCAM IF-TAD
6adat indicator
This indicator will light orange when a valid adat signal is 
received at the IN connector.
If the indicator is not lit, the connection may not be made cor-
rectly, or the adat device may be turned off.
If the indicator is ßashing, it means that both units (the TDIF-1 
and the adat device) have been selected as the clock master, or 
both have been selected as the clock slave. Make sure that one unit 
is selected as the word clock master, and the other as the word 
clock slave.
NOTE
If this indicator and the TDIF-1 indicator 4are both 
ßashing, this probably means that both the TDIF-1 
device and the adat device have been selected as 
clock sources. Rectify this situation by selecting one 
device as a clock master and the other as a clock 
slave. 
						

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TASCAM IF-TAD Ð 13
2 Operation
We suggest (though it is not absolutely necessary) that all equip-
ment is turned off when making connections to and from the 
IF-TAD.
WARNING
Since the word clock source will probably be changed 
for one of the devices, causing an audible ÒglitchÓ, you 
should turn down the levels of all monitoring equip-
ment, to avoid damage to speaker systems, etc.
2.1 Word clock selection
As mentioned earlier, one, and only one, of the devices connected 
to the IF-TAD must be acting as a word clock master. If both 
devices are selected as a word clock master device, the indicators 
4 and 6will ßash, and the IF-TAD will not function.
Likewise, if neither is selected as a word clock master, there will 
be no digital audio transfer possible (data will not be converted 
using the IF-TAD).
Note that the WORD SYNC OUT connector also provides a clock 
signal, based on the signals from the adat unit connected to the 
IF-TAD, and this clock can be used to synchronize other units in 
the system.
Refer to the unitsÕ documentation for full details of how to set up 
the units as word clock masters and slaves. A few examples of how 
to use somecommonly-used units are given below (however your 
best source of reference is always the documentation provided 
with the unit): 
						

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14 Ð TASCAM IF-TAD
¥ On the TASCAM DA-98 and DA-88 DTRS recorders, the 
CLOCK key is used to select between the different clock 
sources available. If this is set to INT, the word clock is be 
internally derived, or if a word clock is available at the BNC 
WORD IN connector, the word clock is taken from there.
¥ On the TASCAM DA-38 DTRS recorder, the WORD 
SYNC IN key is used to select between internal clocking 
and an external word clock received at the WORD IN con-
nector.
¥ To set the TASCAM TM-D8000 digital mixing console 
clock source, use the DIGITAL I/O ClOCK screen.
¥ To set the TASCAM TM-D1000 digital mixer clock source, 
use the Master Clock Select sub-menu of the Option menu.
NOTE
As well as the word clock selection, you should also 
make sure that the audio input source and output con-
nectors for all units are set to the digital input receiving 
data from the IF-TAD and the digital output transmit-
ting data to it.
On the TASCAM DTRS series of recorders, this is 
done using the DIGITAL IN key.
2.2 Problems which may occur
Clock loss on the adat unit may be corrected by changing the pitch 
on the ADAT recorder away from standard pitch, and then return-
ing it to standard pitch. This will force a re-locking of the clock.
Alternatively, you may have to turn off the adat recorder, wait for a 
short while and then turn it on again. 
						

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TASCAM IF-TAD Ð 15
2.3 Notes on word length
Some models of ADAT recorder record and play back digital data 
at 20-bit resolution. 
¥ On the TASCAM DA-38 and DA-98 recorders, if a 16-bit 
input word length is selected, 20-bit data will be truncated to 
the 16 bits recorded on the DTRS recorder. If 20-bit or 24-bit 
is selected as the input word length, the 20-bit data will be 
rounded to 16 bits, using the dither facilities built into the 
DTRS recorder.
¥ On DA-88 DTRS recorders, the data is truncated (rather than 
rounded) to 16-bit resolution.
¥ On the TM-D8000, use the OPTION page of the DIGITAL 
I/O screen to set the word length.
You should be aware of differences in word length in the system, 
and make the appropriate adjustment on the different units in the 
system, referring to the unitÕs documentation if necessary.
2.4 Note on metering
There are differences in the way that digital audio devices from 
different manufacturers display levels on bargraph meters. In the 
case of TASCAM equipment, levels over the digital full-scale level 
are displayed as OVER. On other equipment, levels within 1 dB or 
2 dB of full-scale may be indicated as MAX on the topmost seg-
ment of the display. 
Accordingly, when transferring data between devices, you may 
notice that some louder portions of the material will cause red seg-
ments of the meter on one unit to light, bun not on the other unit. 
This is usually not a problem, and simply reßects the way in which 
different manufacturers choose to inform you of digital signal 
levels. 
						

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16 Ð TASCAM IF-TAD
3 Examples
The following provide examples of simple connections which use 
the IF-TAD to convert between digital audio formats.
3.1 DTRS and ADAT recorders
This simple example allows data transfer between a DTRS 
recorder and an ADAT multitrack recorder:
Note that here the ADAT recorder acts as the word clock master, 
and the DTRS recorder takes its clock reference from the IF-TAD 
through the IF-TADÕs WORD SYNC OUT connector.
3.2 TASCAM digital mixer and ADAT LX20 
recorder
In this example, the TM-D8000 or the TM-D1000 acts as the word 
clock master, providing the clock through the TDIF-1 interface 
and the ADAT recorder acts as the slave, receiving the clock 
IF-TADDTRS ADAT
Word clockadat
data TDIF-1 data
IF-TADTM-D8000 or 
ADAT LX20
adat
data TDIF-1 data
TM-D1000 
						

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TASCAM IF-TAD Ð 17
through the optical interface. No dedicated word clock connec-
tions are required in this setup.
However, as described earlier, the ADAT LX20 may sometimes 
experience problems at Þrst with the word clock synchronization, 
but using the PITCH UP and PITCH DOWN keys to change the 
pitch away from standard, and then re-set to standard pitch will 
usually re-lock the word synchronization (as described in 2.2, 
Problems which may occur). 
						

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18 Ð TASCAM IF-TAD
4 SpeciÞcations
TDIF-1 interface Bi-directional 8-channel, conforms 
to TDIF-1  speciÞcations
TDIF indicator Lights orange when valid TDIF data 
received
adat  IN Optical, 8-channel input conforms to 
adat speciÞcations
adat OUT Optical, 8-channel output conforms 
to adat speciÞcations
ADAT indicator Lights orange when valid data 
received at the adat IN
WORD SYNC OUT 75
W BNC connector
Power input and indicator For use with PS-P414 only
Dimensions (w x h x d)  191 x 38 x 116 (mm), 7.5 x 1.5 x 4.6 
(in)
Weight (IF-TAD only) 750 g (1.65 lbs)
Power requirements 
(PS-P414)USA/Canada 120 VAC, 60 Hz
UK/Europe 230 VAC, 50 Hz
Australia 240 VAC, 50 Hz
PS-P414 output 9 VDC, 6W 
						

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TASCAM IF-TAD Ð 19
4.1 Dimensional drawing
191mm
116mm
38mm11mm 
						

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