AOR AR-ALPHA, Руководство по эксплуатации

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Attenuators (1)
Attenuators allow you to attenuate the input signal by a preferred amount. Users can choose among 0, 10
and 20 dBm attenuation. The “Auto” button enables automatic attenuation, based on the current input
signal level.
Front-End (2)
In the front-end sections, users can control antenna input and select preamp operation. Preamplificator is
on when the button is lit. “Ant.1” and “Ant.2” buttons allow selecting the desired antenna input. If the
optional AS5001 antenna switch is present, it's possible to select antenna input 3 or 4 clicking on the
“Ant.Ex” button. The currently used antenna button will be lit.
Main spectrum window controls (3)
Under the main spectrum window, there are 10 buttons that allow user customization of the software.
“Spect” button shows line spectrum view, while “Wfall” enables waterfall view. Users can reverse waterfall
direction by clicking again on the “Wfall” button. While in waterfall mode, the “Palette” button will be
selectable and clicking on it will pop-up a new window that allows palette selection among 9 predefined
palettes.
“NBW” and “NBN” buttons control noise-blanking filters and operate at different stages. “NBW” enables a
wideband noise blanker working on the full bandwidth range, before demodulation and any other signal
processing; “NBN” enables narrow band filtering.
“Afc” enables automatic frequency control (tuning); if enabled, the demodulator will tune the frequency
automatically, trying to track small frequency changes in the source signal. This operation mode is only
available in FM mode.
“Mono” button is only selectable in WFM mode and forces single-channel audio decoding even if a stereo
carrier is detected.
If “Labels” is selected and enabled, the main spectrum view will also show a dBm amplitude scale;
moreover, a frequency and amplitude indicator will follow the mouse pointer while hovering on the main
spectrum window in both spectrum and waterfall mode.
If “PeakSrc” is also selected, the indicators will snap to the highest peak close to the current mouse
position. If “Auto” is enabled, the software will choose the preferred demodulator and filter settings,
depending on the currently tuned frequency and area (Europe, Japan, USA).
Demodulation (4)
The software allows many demodulators, selectable by clicking on the desired button. “AM” selects
amplitude modulation demodulator. Synchronous demodulation is also possible, by selecting the “SAM”
button. “RTTY” and “CW” are self-explanatory; the demodulators will produce a tone when receiving
signals. “LSB” and “USB” refer to lower and upper sidebands; these demodulators allow the decoding of
AM signals with a suppressed sideband. “FM” and “WFM” demodulators will decode frequency-modulated
signals, and in particular the “WFM” mode will allow 260 kHz wide filtering. “DRM” demodulator will output
an 8 kHz IF DRM signal on a virtual audio cable (only if third-party software VAC is installed -
http://software.muzychenko.net/eng/vac.html ); for optimal DRM demodulation, it's best to set the AGC
block to “Slow”. “USER” demodulation simply outputs on the VAC zero-IF I/Q samples, after filtering and
normalization with current AGC settings.
Amplitude (5)
While in spectrum mode, users can select a preferred reference level and view scale, clicking on the
arrows available on the right side of the “Ref Lev” and “Scale” indicators in the “AMPLITUDE” section.