Nautel Exporter Plus, Technical Instruction Manual

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Exporter Plus Technical Instruction Manual Description
Issue 1.0 2020-05-05 Page 1-3
Location
Broadcast studio
For FM systems, the intended location of the Exporter Plus is at the broadcast studio, as
illustrated in Figure 1.3 . This configuration requires that there be a
LAN STL
between the studio
and transmitter site to deliver the
IBOC
data from the Exporter Plus to the FM Exciter. The
LAN STL
must have a bandwidth of approximately 150 kbs. However, since the
IBOC
data
contains audio information that cannot tolerate excessive delay, a bandwidth exceeding 150 kbs
is recommended.
For AM systems, it is possible to use the Exporter Plus at the studio, however this may be
impractical due to AM’s need for higher IBOC data rates (because IBOC data includes analog
audio) and because any network packet loss will affect both analog and IBOC transmission.
Figure 1.3: Exporter Plus at Studio
Note: Figure 1.3 is based on a low-level FIR (finite impulse response)
IBOC
system.
Transmitter Site
It is possible to place the Exporter Plus at the transmitter site, thus eliminating the need for a
LAN STL
(see Figure 1.3 ). For reasons described above, it may be most practical for AM systems
to follow this configuration. All that is required is that
MPS
audio be sent to the transmitter
site, no differently than would be required with a non-
IBOC
installation. If there is no
LAN
connection between the studio and transmitter site, then it is not possible to implement
MPS
PSD
, or monitor the status of the Exporter Plus.
STUDIO TRANSMITTER SITE
Exporter
Plus
Audio
STL
LAN
STL
MPS
Automation
System
To
Transmitter
Exciter
Audio
STL
LAN
STL