Orban OPTIMOD-FM 8600, Operating Manual

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3-74
OPERATION ORBAN MODEL 8600
ing headphones or minimizing the delay in live sports events, which are the two typ-
ical applications where minimum delay is required. When using this setup, be aware
that analog/digital crossfades in HD Radio receivers will sound very bad. Note too
that switching between an MX and non-MX preset will cause about 345 ms of audio
to be repeated or dropped.
HD I/O Setup Controls
Input/Output > HD Digital Radio screen:
Meter Sel
determines if the Main Meter screen will display the left and right output
levels of the FM processing (
D
ISABLED
) or the left and right gain reductions of the
digital-channel look-ahead limiter (
E
NABLED
).
The HD look-ahead limiter is not stereo-coupled. This prevents limiting
on one channel from causing audible modulation effects on the other
channel.
HD HF Shelf EQ (Pre/Post) determines whether the HD HF shelving equalizer will be
placed before or after the look-ahead limiter that feeds the HD output.
Diversity Delay (“In/Out”) determines if the composite output receives audio de-
layed with respect to the digital radio output. This control applies to both composite
outputs—you cannot delay one output without delaying the other. This control is in
the
C
OMPOSITE
sceen.
You can turn the delay on or off for the various outputs via the 8600’s API (page 2-
Section Label Control Name Values
Input/Output:Output1 Phone Src HD / Monitor / FM
Out Source (analog L/R) HD / Monitor / FM / FM+Delay
Input/Output:Output2
Out Source (AES 1) HD / Monitor / FM / FM+Delay
Out Source (AES 2) HD / Monitor / FM / FM+Delay
Input/Output: Out Level 0… –20 dBFS; 0.1 dB steps
AES Output 1 and
Samp Rate 32, 44.1, 48, 88.2, 96 kHz
AES Output 2 HD Bandwidth 15, 16, 17, 18, 19, 20 kHz
Word Leng 14 / 16 / 18 / 20 / 24 bits
Dither In / Out
Sync Internal / Sync In
Format AES3 / SPDIF
Out Level 0… –20 dBFS; 0.1 dB steps
Input/Output:
HD Digital Radio
Meter Select FMOutLevel / HD GR
HD HF Shelf EQ Pre / Post
Stereo/ Mono Stereo / MonoL / MonoR / MonoSum
Diversity Delay Trim 0.265 to 16.384 seconds
(HD) Polarity Positive / Negative
BS.1770
Safety Limiter BS.1770 Loudness Con-
trol Threshold
–31 to –11 LKFS/LUFS
BS.1770 Safety Limiter On / Off
Table 3-12: HD I/O Setup Controls