Orban OPTIMOD-FM 8600Si, Operating Manual

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3-74
OPERATION ORBAN MODEL 8600Si
analog side of your transmission plant, assign that output’s
O
UT
S
OURCE
control
to
FM+D
ELAY
.
•
If you are using a composite output to drive the FM analog side of your transmis-
sion plant, set the stereo encoder’s
D
IVERSITY
D
ELAY
control to
I
N
.
If you need the shortest possible input-to-output time delay (for example, if you are
driving talent headphones from the off-air feed), defeat the diversity delay on the
output driving the FM analog transmitter by setting the
O
UT
S
OURCE to
FM
or
D
IVERSITY
D
ELAY to
O
UT as appropriate for the output you are using. In this case, the
delay difference between the analog and digital radio outputs will not stay constant
when you recall different presets. This is not important for these applications be-
cause one gives up proper diversity delay (around eight seconds) for the sake of
driving headphones or minimizing the delay in live sports events, which are the two
typical 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
).
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 Control
Threshold
–31 to –11 LKFS/LUFS
BS.1770 Safety Limiter On / Off
Table 3-13: HD I/O Setup Controls