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888-2587-001
4/18/11
WARNING: Disconnect primary power prior to servicing.
FM HD Radio System
Section 2 Installation & Initial Turn-On
2.6.5
STL
When selecting an STL, the minimum requirements for the STL, it has to pass 32 kHz
AES audio and 192Kbps UDP. Future systems with expanded HD capability will need
to pass 300 kBs UPD only.
Other methods to send the information to the transmitter site include T1/E1, direct fiber
or Satellite.
2.7
Component requirements for SPS service
The following equipment/connections are needed when adding any SPS service to the
MPS described above. Brief but specific requirements for each component will be
discussed here. Refer to the fold-out sheets in the back for the SPS component
configuration into the system.
2.7.1
SPS Audio Processor and rate converter
The audio intended for any SPS channel, needs to be AES3 format, 32kHz to 96kHz.
Any SPS audio must be rate converted to 44.1 kHz and synchronized to the Exporter
with a Lynx AES16 XLR audio board. Utilize the Exporter 44.1 kHz clock output for
the "sync in" to the rate converter. If the processor does not have a rate converter, a
separate rate converter will be needed, or an audio input card inside the Importer with
the sample rate converter function such as the Lynx AES16SCR. Some audio
processors may need to use the monitor output of the Exporter as a sync source.
2.7.2
NeuStar
The NeuStar is an optional codec pre-conditioner. Meaning that it will modify the AES
audio when there are low bitrate situations that would needlessly require more work
from the codec than it is capable of. It does this so that excess audio artifacts that might
be heard will be minimized. The NeuStar will reduce problems called "codec busters"
such as DC offset, clipping and L to R static timing issues.
2.7.3
HDE-100 Exporter 44.1 kHz Clock OUT
This output from the Exporter is only used to synchronize the SPS audio going to the
Importer. If you are not running SPS, no connection is needed. You may have to use a
transformer to convert this 110 ohm output to a 75 ohm BNC input depending on what
type of SPS processor or converter you are using. An impedance transformer like the
