Manual

Page 28 Instant Replay Owner's Manual
Unbalanced connections should be made by connecting the unbalanced signal output to pin 2 of the
Instant Replay and ground to pin 1, with pin 3 left unconnected.
Audio Outputs
The main ANALOG OUTPUTS are a pair of male XLR-3 connectors. The output is electronically
balanced, and is capable of driving loads of 600 ohms or greater. Full scale output level is +25 dBu
with the OUTPUT ATTENUATOR in the 0 position. Output cables should be wired the same as shown
above for the inputs.
Unbalanced connections are achieved by connecting pin 2 of the Instant Replay XLR Output to the
unbalanced input and pin 1 to ground, with pin 3 left unconnected.
Output Attenuator Switch
The OUTPUT ATTENUATOR switch is located on the rear panel. Set this switch to the in position for
operation of Instant Replay with equipment having a nominal operating level of +4 dBu. Set the
switch to the out position for use with equipment operating at -10 dBm.
The switch has no effect on the LEVEL METERS, digital audio 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 in Stop mode, the HEADPHONE OUTPUT is active and the Main
Outputs are turned off during subsequent playback. 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 Input
An XLR-3 female connector is provided for digital input in the AES/EBU format. There is a
selectable Sample Rate Converter built in to Instant Replay. When SAMPLE RATE CONVERTER
is ENABLED, 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 for runs of over 6 feet.
IEC 958 Type II Input
An RCA "phono" connector provides a digital input from consumer or semi-pro equipment. Most
equipment with connectors marked "S/P DIF" can be connected to this input.
As described in the previous section, when SAMPLE RATE CONVERTER is ENABLED the input
will accept any sample rate from 24k samples/second to 50k samples/second. Use only low-
capacitance 75Ω 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
Should Instant Replay detect a mismatch at its digital audio ports when preparing to record, the PLAY
button is disabled and an error message appears in the display. Possible mismatches can include
format conflicts, non-audio data and data flagged as invalid. Copyright Protected data (“SCMS”) will
cause a similar error message. Correct the mismatch as necessary.