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 A
NALOG
O
UTPUTS
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 O
UTPUT
A
TTENUATOR
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 O
UTPUT
A
TTENUATOR
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 L
EVEL
M
ETERS
, digital audio outputs, or the H
EADPHONE
O
UTPUT
.
Headphone Output
The H
EADPHONE
O
UTPUT
always carries the same signal as the Main outputs, but its level is
controlled by the H
EADPHONES
L
EVEL
control on the front panel.
When the P
REVIEW
button is activated in Stop mode, the H
EADPHONE
O
UTPUT
is active and the Main
Outputs are turned off during subsequent playback. It may be helpful to use the H
EADPHONE
O
UTPUT
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 75
Ω
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 P
LAY
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.
