QCX assembly Rev 1.08
84
Semi
: After key-up, there is a delay bef
ore the Transmit/Receive switch is set back to “Receive”
mode. The receiver is therefore kept muted during your whole CW transmission, not listening to
the band in between your transmitted symbols. Many operators prefer to avoid the distraction of
hearing the band between their dits and dahs. In Semi-QSK mode the Transmit/Receive switch is
set back to “Receive” only after a suitable delay (of 8 dit lengths), long enough to occur only at the
end of the transmission.
4.7 Practice
OFF
Normally you would leave Practice mode switched OFF. However if you want to practice sending
CW, and see if the CW Decoder can decode you, then you can switch Practice mode to ON. In
practice mode, the radio does everything it normally would, except that it never sends any RF
power to the antenna!
4.8 Sidetone frq
700
This NUMBER parameter allows you to change the Sidetone frequency if you wish. Sidetone is
the audio tone which is generated by the microcontroller on key-down and injected into the audio
signal path. Sidetone is ONLY an operator convenience to let you hear your keyed signal, and has
no impact at all on the transmitted RF amplitude or frequency.
It is strongly recommended to leave the Sidetone frequency set to the same frequency as the CW
Offset frequency in the VFO menu. Your ears will get used to recognising the 700Hz audio tone,
and it makes it then much easier to accurately tune to a station you hear transmitting on air, such
that his signal will also be at 700Hz audio in your receiver. When you hear him at 700Hz, he will
be in the middle (near, anyway) of your CW audio filter. When you transmit you will also be netted
accurately to his frequency. All being well, this should mean that your signal also ends up nicely in
his CW filter passband too. Then you can QSO!
4.9 Sidetone vol
99
You can use this parameter to reduce the volume of the sidetone audio. Most people will find the
default setting of 99 too loud. So experiment with lower values until you find a sidetone audio level
which you find comfortable.
Summary of Contents for QCX 5W CW
Page 9: ...QCX assembly Rev 1 08 9...
Page 10: ...QCX assembly Rev 1 08 10...
Page 12: ...QCX assembly Rev 1 08 12...
Page 50: ...QCX assembly Rev 1 08 50...
Page 105: ...QCX assembly Rev 1 08 105...
