Orban OPTIMOD-FM 8600, Operating Manual

Page: 99 / 397

OPTIMOD-FM DIGITAL INSTALLATION
2-39
15. Set up a low-delay headphone monitoring system (optional).
If you are using an “MX” preset and/or using the diversity delay, it is impossible
for talent to monitor the signal off-air while speaking because the delay is too
large. To provide a talent headphone feed, you can configure any of the 8600’s
left/right outputs (analog, AES1, and AES2) to receive the output of a special ver-
sion of the multiband compressor (without look-ahead). The input/output delay
is approximately 3-8 milliseconds (depending on the setting of
AGC C
ROSSOVER
T
YPE
)
and should be comfortable for talent. See the discussion in Monitoring on
Loudspeakers and Headphones on page 1-26.
Note that the Multipath Mitigator adds about 250 ms of delay to the au-
dio path, including the monitor output, so you must defeat it in Setup if
you wish to use the low-delay monitor output.
To configure any output for Low-Delay Monitoring:
A) Locate to the
I
NPUT
/
OUTPUT
>
O
UTPUT
1
screen to configure the analog or
AES1
outputs. Locate to the
I
NPUT
/
OUTPUT
> O
UTPUT
2
screen to configure the
AES2
output.
B) Choose
O
UT
S
OURCE
> M
ONITOR
.
C) Set the preemphasis control to
F
LAT
for the output you are using for monitor-
ing.
CAUTION:
The low-delay output has no peak limiting and is therefore
not suited for driving a transmitter. If you use the low delay output, you
must drive your transmitter with a digital output or with the composite
output.
If you need a low-delay output that can drive a transmitter, configure the
8600’s outputs for
O
UT
F
EEDS
: T
RANSMITTER
and use one of the 8600’s UL
presets. See Ultra-Low-Latency Five-Band on page 3-20.
If you use the low-delay output to drive both your studio monitor speak-
ers and talent headphones (which may be necessary if your console has
only one monitor input for both), we recommend connecting a loss-of-
carrier alarm to one of the 8600’s GPI inputs and programming this input
to mute the monitor output in the event that carrier is lost. This simulates
normal “off air” monitor functionality and immediately alerts the staff if
the transmitter goes off the air unexpectedly.
You can program any GPI terminal for Monitor Mute functionality from
S
YSTEM
S
ETUP
> N
ETWORK
/R
EMOTE
1
(the
R
EMOTE
screen). The
O
UT
S
OURCE
parameter located in the
I
NPUT
/
OUTPUT
> O
UTPUT
1
screen needs to be set
to
M
ONITOR
to make the Monitor Mute feature work.
16. Defeat the final clipper (optional).
If you are using the 8600 to drive a network with protection audio processors
(like Orban’s Optimod-FM 2300 or 5500) at each transmitter, you may wish to de-
feat the 8600’s final clipper to prevent double clipping, which can unnecessarily
increase distortion on-air. To do this:
A) Put a non-MX preset on air. (Clipper defeat is not supported in MX presets.)
B) Locate to the
I
NPUT
/
OUTPUT
>
U
TILITIES
screen.