But even my Tigertronics SignaLink can SEND and RECEIVE CW by on/off audio keying. The output (3.5mm cable) of my Rigblaster Advantage can key the CW socket of my (old) Icom 746Pro so i can operate TRUE CW via my keyboard. What is your HF radio? Does it permit CW keying via a “COM” port? If so, the resti is easy. The op on the other end of the QSO has no way of knowing HOW I am sending CW tones. FLDIGI allows you to send CW either way - direct keying of a CW key jack, or audio keying via a mic/data port.
The COM port can be set up for PTT or for CW keying (via the RTS or DTR pins) only if your rig supports this. Some Rigblasters (the Advantage) does include a COM port and a sound card. So you cannot send MCW with rig in SSB mode There are some possible advantages (in some radios) to work the mode CW with rig in CW “mode”. MCW needs a carrier: so it can only be sent with FM or AM. Your radio’s audio needs to be carefully set so that the ALC is zero This is just the same as sending AFSK RTTY in place of FSK RTTY One might argue that this is MCW (modulated CW) like the CW tones sent via a FM repeater. The radio converts the on/off audio into on/off RF at the VFO frequency.
2) You CAN send CW with your rig in either CW or SSB (USB or LSB) but a SignaLink is only a SOUND CARD and has no COM port (for true CW keying) 3) You can send CW with ANY sound card by sending ON/OFF audio tones (at any pitch you want) with rig in USB or LSB mode. Chris ks5ky Here is a short answer 1) You CAN send and receive the mode CW with FLDIGI and a sound card You can send and receive CW with your radio in CW mode, obviously, or in SSB mode.
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