Akai DD1500 User Manual page 33

CONNECTIONS - SYSTEM - 4
In this diagram, we see a system with all the options!
Two DD1500a ADC/DAC units are connected to the DD1500m offering the full
complement of outputs for mixing on a large console and these connect to the UNIT 1
and UNIT 2 ANALOGUE multi-way connectors on the DD1500m. With the DD1500a
converters connected, you may also record analogue audio through the analogue inputs.
You may also, of course, record digitally through the digital inputs A and B plus you could
have extra digital inputs and outputs installed in the DD1500m for use with a digital mixing
console.
The DD1500x disk drive is connected using SCSI. The same consideration must be given
regarding cable length and termination. In the diagram, it is implied that other drives are
connected to the system as well. If so, make sure that each drive's SCSI ID is different.
Failure to observe this will cause problems as drives contend with each other on the SCSI
buss (see CONNECTIONS - DD1500x for information on setting SCSI IDs and selecting
termination).
As in the basic configuration, the DL1500 is connected using AKAINET and a BNC cable.
For the system to work, it is essential that termination be switched to the ON position on
both the DD1500m and the DL1500.
The audio link between the DD1500m and the DL1500 is also shown here although,
bearing in mind that the analogue outputs are connected to a mixer in this example, it is
possible that you would not need to use the DL1500's monitor output in this situation as
you will no doubt be monitoring through the mixer. However, you may still wish to use it for
convenient headphone monitoring on the DL1500.
In such a setup, a larger S-VGA monitor may be useful and you may use any size
monitor. 21" is a good size if you need to see the monitor from some distance but if space
in the studio is at a premium, a 17" monitor is a good compromise.
Also connected to the DL1500 in this system is a standard IBM or compatible PC
computer keyboard. This connects to the DL1500's rear panel KEYBOARD connection
and can be used to name files more easily. The computer keyboard serves no other
purpose than to name things.
As with the basic setup, a VTR is connected using RS422 and a timecode feed from the
VTR is connected to the DD1500m's SMPTE input. Again, it is recommended you sync
the whole system to a common house sync source for precise wordclock synchronisation.
This would normally be connected to the WORDCK(A)/VIDEO SYNC(A) BNC connection
on the DD1500m and the sync type selected from the DL1500.
NOTE: One unique feature of the DD1500 is its ability to read one type of timecode and
generate another. For example, in the diagram shown above, you could be controlling a
VTR using RS422 with the DD1500 synchronised using SMPTE/EBU timecode but, at the
same time, be generating Bi-Phase to synchronise film equipment.
Version 2.00 - March, 1996 Page 25