Asymod BT-HPSA V2, Instruction Manual

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Introduction
The Asymod BT-HPSA V2 Hi-Fi Asymmetrical AM
Modulator and Station Monitor
BLUthunder Technologies’ High Power Standalone (HPSA) V2 was designed to provide the radio
operator with important functionalities required for a Hi Fi radio station. The high power
standalone Asymod Hi-Fi Asymmetrical AM Modulator and Station Monitor provides the power,
controls and useful functions necessary, all in one compact unit. It simplifies your radio station
by reducing the amount of external wiring and components.
The Asymod HPSA V2 can help you achieve the highest possible quality in AM transmissions
comparable to AM shortwave, medium wave and long wave broadcast sound. It delivers louder,
cleaner, brighter, FM-like audio that attracts listeners.
The HPSA V2 delivers high-quality FM-like sound by transparently passing your processed audio
with no limitation. Preset roll off points can be set on board or can be user defined via the
audio process chain. Processing your audio is necessary to make up for the limitations of the
average receiver because such processing can make audible many defects ordinarily lost in the
AM noise, it is very important that the source audio be as clean as possible.
Making the Most of your Hi-Fi Station

The HPSA V2 is suitable for HF operation an all high and low level modulation solid state
transceivers. The installation procedure for low level modulation transceivers do require
more intricate details.

The HPSA V2 increases the spectral density and loudness of the transmitted signal by
providing for amplitudes in excess of +300% modulation while not exceeding the
negative peaks at -100% without the use of negative peak limiting or clipping methods
which produce squaring of the modulation envelope.

The HPSA V2 allows the operator to precisely control the peak levels to prevent
overmodulation. The Asymmetry is adjustable from 100% to 300%+ positive peak
modulation. The available headroom allows for 10 W of carrier at 250% positive peaks
(110 W PEP).