Instruction Manual

74 •
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• D-Net File Transfer
E LECTRICAL S PECIFICATION FOR D-N ET T RANSFERS
File transfers may be accomplished via either of two digital audio interfaces:
• AES-3id-2000 (Proposed AES standard, 75Ω impedance, BNC connector)
• AES-3 (AES standard, 110Ω impedance, XLR connector)
Both outputs always carry the same signal. There is no output selection necessary.
AES-3ID
The AES-3id-2000 interface has been designed to operate using coaxial cable with a nominal
impedance of 75Ω with a male BNC. DigiCart/E does not terminate this signal internally. When a
coax cable is connected from a DigiCart II output to the input of a DigiCart/E, a 75Ω termination must
be added at the receiver end of the line (DigiCart/E). This can be done with a T-connector and
terminating cap. If DigiCart II is the receiving end, do not use external termination.
If other devices are inserted in the data path (such as routers or switchers), the user should ensure that
the transmitting DigiCart drives a nominal impedance of 75Ω and that the receiving DigiCart is being
driven by an output presenting a nominal 75Ω output impedance. This will serve to maintain correct
signal amplitude and to minimize transmission errors caused by signal reflections from the far end of
the cable.
The AES-3id-2000 interface has been successfully tested using 150m of Belden 8281, 75Ω coaxial
cable.
AES-3
The AES-3 interface has been designed in compliance with the AES-3 recommended practice for serial
transmission format for two-channel digital audio data. The connectors required for this interface are
described in IEC 268-12, and are XLR three-pin connectors. The pin usage is:
PIN 1: CABLE SHIELD OR SIGNAL EARTH
PIN 2: SIGNAL
PIN 3: SIGNAL
Note: The polarity of pins 2 and 3 is not significant.
The recommended cable for use with AES-3 is balanced and shielded with a nominal impedance of
110Ω at frequencies from 0.1 to 6.0 MHz. The maximum recommended cable run for file transfer
using AES-3 is 100 meters.
D-Net Setup
A D-NET transfer is always initiated at the Source DigiCart. However, both the Source and Destination
DigiCarts require setup.
You can access the File Transfer menu by selecting DNET FILE TRANSFER from the Utility menu. Once
in the File Transfer Setup menu, you’ll navigate through the options with the selection knob and Navigation
buttons. You’ll confirm selections with the ENTER button and cancel them by pressing the EXIT button.
NOTE: Setup can be done from a 360 Systems RC-320 remote control or a keyboard. Please refer to the
operations manual of your remote control for complete instructions.