Digital audio connections – 360 Systems Instant Replay DR-550 User Manual
Page 20
page 14
Instant Replay Owner’s Manual
PIN 1
COMMON
PIN 2
+ INPUT
PIN 3
- INPUT
Analog Audio Outputs
The main analog outputs are a pair of male XLR-3 connectors. The output is balanced, and is
capable of driving loads of 600 ohms or greater. Full scale output level is +24 dBu. Output cables
should be wired as shown above for the inputs.
Unbalanced connections are achieved by connecting pin 2 of the Instant Replay to the hot lead of
the unbalanced input or output and pin 1 to ground.
Output Attenuator Switch
An Output Attenuator switch is located on the rear panel. Set this switch to the out position for
operation of Instant Replay with equipment having a nominal operating level of +4 dBu. Set the
switch to the in position for use with equipment operating at -10 dBu.
The switch has no effect on the level meters, digital outputs, or the headphone output.
Headphone Output
The Headphone Output always carries the same signal as the Main outputs, but its level is
controlled by the Headphones Level control on the front panel.
When the Preview button is activated, the Headphone Output is active and the Main Outputs are
turned off. It may be helpful to use the Headphone Output for control room monitoring, while the
Main Outputs provide the main feed to a mixer or transmitter.
DIGITAL AUDIO CONNECTIONS
AES/EBU Inputs
An XLR-3 female connector is provided for digital inputs in the AES/EBU format. The input will
accept any sample rate from 24k samples/second to 50k samples/second. Use only special AES
cable having an impedance of 110 ohms. Limit the cable run to 100 feet. Do not use microphone
cables.
IEC 958 Type II Inputs
An RCA "phono" connector provides a digital input from consumer or semi-pro equipment. Most
equipment with connectors marked "S/P DIF" can also be connected to this input.
The input will accept any sample rate from 24k samples/second to 50k samples/second. Use only
low-capacitance 75 ohm coaxial cable, such as those made for video connection between VCRs
and television video inputs. Do not use audio cables with RCA connectors.
Digital Audio Interfacing