AOR AR-ALPHA, Operating Manual

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11
I/Q Digital Output
I/Q stands for In-Phase/Quadrature -Phase.
At the 3
rd
IF stage, the AR-ALPHA provides an I/Q output. The I/Q digital signal consists of two (2)
different digital signals that are phase-shifted 90 degrees.
The I/Q output is provided through a continuous isochronous USB 2.0 standard interface. By using
the I/Q digital output, the streamed data can be stored on a PC hard disk for future signal analysis.
FFT (Fast Fourier Transform)
The AR-ALPHA utilizes FFT (Fast Fourier Transform) technology for the spectrum display feature.
FFT in the AR-ALPHA refreshes the spectrum display more than 10 times per second during a 10 MHz
sweep (at 500 Hz RBW). The AR-ALPHA can display a wide range sweep up to 1 GHz.
Receive modes / Additional features
WFM (Wide FM)
Stereo sound (auto detected), Selectable de-emphasis 50 uS/75 uS
Stereo output is available from the headphone jack using optional stereo headphones or from
the RCA jacks on the rear panel (optional stereo amplifier required)
NFM (Narrow FM)
Built-in DCS (Digital Coded Squelch)
Built-in CTCSS (Continuous Tone Coded Squelch System)
Built-in Voice Inversion Descrambler (4,500 Hz +/- 2,000 Hz) (Not available on USA consumer
version)
Built-in APCO25 (P-25) decoder (conventional mode only)
Built-in AFC (Automatic Frequency Control)