I use fldigi on occasion - with flrig to control the QMX.
In flrig, you set the config to talk to the QMX - there is even an entry for it in their 'rig' selection:
?
Note that it is good to set the polling interval up as high as it will go - the QMX firmware is not expecting rapid polling.
The 'update' button by the com port selection re-scans the computer com ports, which is useful if you start the program before your QMX has been cabled and powered on.? Press the 'init' button to connect after you select the port.? I have seen the 'connected' indication get stuck at green when it is not connected, so keep that in mind.? You can tell it is connected back in the main flrig window because it will update the frequency display, A/B, and PTT buttons will work.
One more flrig config window I played with:
I reduced the number of controls it would try to poll for.
?
In fldigi itself, you need to select the rig control and soundcard:
Rig control needs set to 'flrig'.? I tried Hamlib, but was having problems, so I switched to fldigi.
?
Under soundcard select the QMX in and out devices.? If you don't see these, restart the QMX and this program, and also make sure the QMX does NOT have I/Q Mode enabled (that disables the soundcard devices).
?
Also, in the bottom-right corner of the fldigi window, to the right of the received signal indicator, is a "TX Level Attenuator" control.? That should be set to 0, so a maximum signal level goes out on TX.
?
You also must disable the fldigi TxID feature, because the timing of the TxID preamble fools the QMX data detection routine, and it will only transmit the few milliseconds of the preamble then cut out.? Alternately, you can set the QMX digimode rise and fall thresholds to zero, which works ok, but disables the cleaning the QMX normally does on its output waveform, so the signal start/stop won't be as clean.? At some point this may get fixed in the firmware - it's on Hans list.
?
That's about it, other than to remember it will only currently work on CW, RTTY and MFSK modes - ones that transition between single tones.? It will not work properly on any of the phase-shifting (PSK) modes.? I have used it on MFSK and RTTY.
?
Stan KC7XE
?
?
