Installation manual

Revision F • 3/11
HARRIS CORPORATION
3-17
3 Control Center Software
Select Main Only when the Main AES input
provides the signal for both the analog and the
HD Radio modulation paths. The AES Fault indi-
cation is suppressed since the MPS input will not
have a valid AES signal.
Select Main & MPS, No failover when the pro-
gram processing is so different between the ana-
log signal and the HD Radio signal that it is not
desirable to use one signal in the other applica-
tion. Thus, if either signal were to fail, there would
only be an AES Fault indication without any in-
ternal signal switching to cover for the missing
audio input.
Note that the HDE-200 does not perform
silence detection, it simply monitors the two in-
puts looking for valid AES clock, outputting an
AES Fault if no AES clock is detected.
Audio Options Section
Invert Digital Polarity
Check this selection to invert the signal polarity
of the analog signal path within the HDE-200 in
the unlikely event there is an unresolvable polar-
ity inversion between the HD Radio signal pro-
cessing and the analog signal processing paths
through your system. Normally this is unchecked.
Receiver Trim Level
This control affects the HD Radio receiver’s
output level for the HD Radio signal. It’s used to
compensate for any apparent loudness disparity
between the analog and HD Radio signals due to
how the analog and digital signal chains are pro-
cessed and transmitted.
The HD Radio signal’s audio output can be ad-
justed by up to +/- 7 dB, as compared to the ana-
log broadcast output level (which has a fixed level
in the receiver). Adjust the output level in 1 dB
increments by clicking the up or down arrows.
Click the large arrow button to pop up a volume
slider.
Ramp Mode
This setting affects how the HDE-200 Diver-
sity and optional Profanity Delay ramping algo-
rithms operate. There are three ramp modes on
the HDE-200:
· Linear Ramp (not recommended)
· Soft Ramp (recommended for any format)
· Smart Ramp (recommended for sports and
talk formats only)
Selecting Linear alters the Diversity and Pro-
fanity delays by a fixed rate. The default ramp rate
is fairly slow, approximately 3% deviation from
normal pitch and tempo. The downside of linear
ramping is that most people can easily discern the
beginning and end of the ramp change by the
abrupt alteration of pitch and tempo.
If the ramp rate is too fast the effect is rather
jarring to the audience. If the ramp rate is too slow,
it will seem to take forever for the ramp process to
complete. This method is the way all other
manufacturer’s exporter devices behave during
Diversity delay alterations.
Soft Ramp (an HDE-200 exclusive mode) be-
gins and ends the alterations of the Diversity and
Profanity delays in a very gradual manner. The
Soft ramp rate achieves an ultimate rate much
faster than a linear rate without being noticeable
to the listening audience. Soft ramp’s default limit
rate is a 6% deviation from normal pitch and
tempo, which is roughly a musical semitone.
The advantage of soft ramp is that no one will
discern the beginning and end change of pitch and
tempo, while the ramp rate can be accelerated to
a more rapid terminal ramp rate without listeners
being able to discern the process. The Soft ramp
selection can be applied to all program formats
with no concern as to the audience impact.
Smart Ramp (an HDE-200 exclusive mode) al-
ters the Diversity and Profanity delays in two ways:
an extraordinarily slow, 0.8% ramp rate is used