Inovonics AARON 650, Installation & User Manual

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nation of the two will, again, depend entirely on reception con-
ditions, the character of the noise you are trying to get rid of,
and other factors best decided after critical listening in each
situation.
Highcut
The
Highcut
setup menu looks identical to the two blending
menus, the difference being that instead of sacrificing stereo
separation for a lower noise floor, the high audio frequencies
are progressively rolled-off as the RF signal deteriorates.
Highcut may prove of some use in translator applications, but
the downside is that the program will lose its ‘sparkle,’ and
even sound ‘dead’ when enough top-end rolloff is dialed-in to
make an audible improvement in noise.
Again, use your ears to evaluate the value of
Highcut
, and re-
member: it works only in the Stereo-Regen mode. Setup guide-
lines are the same for this function as outlined for blending,
above.
Stereo/Mono
The
Stereo/Mono
setup menu simply allows the AARON 650 to
be placed in Forced Mono in the Stereo-Regen mode. Normal
operation is
Stereo (Auto)
.
Enhancers
The SDR front end offers two Reception Tools of an advanced
nature. These operate in the RF/IF signal path and thus are ac-
tive in both the Pass-Through and the Stereo-Regen modes.
There are no adjustments for these two tools, and use of them
is dictated solely on their sonic merits when receiving a signal
of marginal quality. The factory default for both of these is ‘on’
(both boxes checked):
Multipath Suppression
and
Channel
Equalizer .
SETTING OUTPUT LEVELS
From the Main Menu, navigate to any output level adjustment
utility of interest:
Setup / Analog Audio Output
,
Setup / Digital Audio
Output or MPX Output . The characteristics of each of these out-
puts, their options and adjust ranges explained on Pages 13
and 14. Just bracket, push and turn to set levels.
COMPOSITE/MPX SIGNAL PROCESSING
The AARON 650 includes a ‘composite clipper’ in the compo-
site/MPX output path to better define and control the peak-to-
peak amplitude of the output signal. This processing block is
available in both the Pass-Through and the Stereo-Regen modes
of operation.
The composite waveform is first stripped of the 19kHz stereo
pilot and 57kHz RDS subcarrier, which are re-introduced after
the clipper. (See Block Diagram, Pages 9and 10.) This exercise