OPTIMOD-FM INSTALLATION
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Meter Sel determines if the Main Meter screen will display the left and right output lev-
els of the FM processing or the left and right gain reductions of the digital-channel look-
ahead limiter.
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 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.
Analog Output
Out Source (“HD Analog Output Source Feed”) determines if the HD analog output re-
ceives the signal before the digital-channel look-ahead limiter, the final post-limiter digi-
tal-channel signal, or the FM low-delay monitor feed. The latter can be useful if you wish
to use the low-delay monitor feed but you need the FM analog outputs to carry the main
processed FM feed.
When you choose the digital-channel pre-limiter feed, this will also include
the effects of the digital-channel HF shelving filter if this has been set to
Pre.
Out Level (“HD Analog Output Level”) determines the peak output level (in dBu) of the
HD I/O card’s analog outputs.
Digital Output
St./Mono (“HD Output Stereo/Mono Mode”) determines if the digital-channel output
will be fed by the normal stereo output of the multiband compressor/limiter, or by a
mono feed from the multiband compressor/limiter’s left channel, right channel, or sum of
left and right channels. In all cases, the signal appears on both the left and right channels
of the analog and digital outputs.
The 8400 does not set the AES/EBU stereo/mono status bits to reflect the
setting of this control. The AES/EBU status bits appearing at the HD output
are always set “stereo” even when the two audio channels carry identical
mono signals.
Out Level (“HD AES/EBU Output Level”) sets the digital-channel output level with re-
spect to digital full scale.
Samp Rate
(“HD Output Sample Rate”) sets the output sample rate of the digital-channel
output.
The 8400’s fundamental sample rate is always 32 kHz, but the internal sam-
ple rate converter sets the rate at the 8400’s digital output. This adjustment
allows you to ensure compatibility with downstream equipment requiring a
fixed sample rate.
Word Leng (“HD Output Word Length”) sets the word length (in bits) emitted from the
digital-channel output.
The largest valid word length in the 8400 is 24 bits. The 8400 can also trun-
cate its output word length to 20, 18, 16 or 14 bits. The 8400 can also add
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