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4 - CONNECTIONS - DD1500M
VTR CONTROL
This allows you to connect video equipment fitted with RS422 interfaces for remote
machine control. The protocol used is the Sony™ P2 9-pin protocol, pretty much the
standard for machine control in broadcast. This allows you to control a VTR from the
DL1500 causing it to play, stop, rewind, fast forward, locate and jog as you operate the
DL1500. In this way, editing and syncing audio to picture on the DL1500 is an integrated
operation.
The RS422 connections are also used to control an external RS422 device during the
AUTO CONFORM process
The DD1500 may also be set to work as a slave to RS422 where it can be controlled by a
video editor. This is useful in situations where you can compile the audio for a project as
the picture is being edited.
GPI/O
The DD1500m has three general purpose inputs (GPIs) and four general purpose outputs
(GPOs) and these may be set to perform a variety of useful functions.
You may use the GPIs to cause the DD1500 to start or stop playback, fast forward, rewind
or stop and start recording as well as many other assignments. In this way, you may, for
example, build your own simple remote controller for the DD1500 for simple applications
(for example, a simple PLAY/STOP remote so that you can use the DD1500m as a
playback device without needing a DL1500). Another example would be to use the GPOs
of another device to remotely control the DD1500 (for example, use the GPOs of a
dialogue replacement looping recorder to control the DD1500).
You may use the GPOs to switch devices on and off on certain actions. A simple
suggestion may be to turn on a red light in a voice-over booth when you enter record.
Many things are possible and no doubt you will find your own uses for these connections.
SCSI
The system's disk drives are connected to this 50-pin Amphenol SCSI connection.
REMOTE - AKAINET/DIGITAL AUDIO OUT
These connections are for the DL1500. The AKAINET BNC connection is an Ethernet
connection using a standard BNC cable
to the ON position on both the DD1500m and the DL1500. Failure to do so will result in
the two units not communicating with each other and the system will not work.
The DIGITAL AUDIO OUT 9-pin D-sub connection is a digital audio link between the
DD1500m and the DL1500 that allows convenient remote line audio output and/or
headphone monitoring on the DL1500 via the DL1500's built in Digital to Analogue
Converters (DACs). The signal is an AES/EBU signal and has a theoretical maximum
length of 50 metres.
DIP SWITCHES
Please see APPENDIX 3.
SIGNAL GND
This allows you to earth the unit to reduce the possibility of ground loops in a complex
setup.
MAINS INPUT
Mains power is connected here.
1
Ethernet is a standard protocol for communication between computers and is used as a
means of networking a system of computers. The DD1500 uses Ethernet because, unlike
SCSI, it allows true remote control with virtually no limit on cable length.
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. It is essential that the TERM switch is switched
Version 2.00 - March, 1996
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