Asymod BT-HPSA V2, Instruction Manual

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Controllable and Adjustable

Gain control allows for proper audio drive from the microphone and line level input.

Modulation Level control allows for final audio control and is set in combination with
the Carrier and Asymmetry controls to achieve the level on modulation desired.

Carrier control sets the reference carrier level (dead key) to set the modulation and
asymmetry levels.

The Asymmetry control maintains the negative peaks at -100% modulation while
allowing for positive peaks of excess of 300% without pinching or clipping.

The REC MIX control allows for selecting and balancing RX and TX audio signals to the
desired levels. This provides level equalization of TX and RX audio signal for recording
and monitoring via headphones.

The TX MON switch allows to select between TX line level audio (LINE) or TX
demodulated audio (DEMOD). The audio from the LINE is a sample of the audio from
the audio chain while the audio from the DEMOD is audio sampled from the TX RF stage
of the transceiver via an AM detector/demodulator.
NOTE: The output of the AM detector / demodulator typically sounds high pitched, shrill
and strident because, unlike virtually all real AM radios, the detector / demodulator has
a flat response. Rolloff filtering can be used to adjust this audio so that it more closely
resembles that heard over a typical AM receiver.

REC LEVEL control allows to set the record output level for external recorder / playback
device.

The Phones control sets the desired level for the monitoring headphones.

The transceiver automatically controls the mode set; AM / SSB-FM