3.7 CW-R
OFF
This boolean parameter enables the CW-R mode. Ordinarily CW is received in Upper sideband
with a 700Hz offset. There may be some occasions where operation on the other sideband is
desired (lower sideband), for example to exclude an interfering nearby station when the CW filter
performance is asymmetric. In these cases you can switch on CW-R by setting this menu item to
ON, to select Lower sideband reception mode.
3.8 CW offset
700
This parameter specifies the CW offset in Hz. It is the difference between the VFO frequency
during transmit and receive. It is automatically applied during receive in order to resolve a perfectly
netted transmission on the same frequency as yours, at 700Hz audio output.
If you wish to change the CW offset frequency you may do so using this parameter. However, be
warned that the 200Hz audio analogue filter in the circuit is still centred on (approximately) 700Hz.
If you moved the configured CW offset frequency too far away, then the received audio will fall
outside the CW filter and be attenuated.
4.11
Keyer menu
The Keyer menu contains a number of configuration parameters relating to the CW keyer, which
are described below.
4.1 Keyer mode
Straight
The mode of the CW keyer function in the firmware. Possible modes are:
Straight
IAMBIC A
IAMBIC B
Ultimatic
If you wish to use a traditional up/down Morse key, these are called “straight” keys and you should
select the “Straight” mode. If you wish to use a modern paddle then select the desired operating
mode e.g. IAMBIC A.
QCX operating manual, firmware 1.07, manual edit 0.03
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