750 Hz Square Wave from #QMX Speaker while Transmitting #qmx #beacon
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Does anyone else hear this constant 750 Hz square wave through the speaker while the QMX transmits a CW, FSKCW or WSPR beacon message only when the QMX is in USB or LSB mode?
While the QMX is in CW or DIGI modes the speaker remains silent during beacon transmissions . Watch my video at
QMX+ transceiver with Firmware 1_01_003 ?
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I suspect that the QMX hardware is generating the steady fixed volume 750 Hz square wave and outputing it through the earphone jack only during beacon transmissions.
This only occurs when the QMX is left in USB or LSB mode during the QMX's built-in beacon transmissions. This report is merely an observation. There is no apparent malfunction as the transmitted beacon RF is a clean single frequency signal. AD5DZ also reported observing 750 Hz square waves /g/QRPLabs/message/139807 |
Carol KP4MD