[RTTY] CE0Y/I2DMI video

[iw1ayd]

G'day Mike.

The MMVARI standalone kit have some multichannel provision but it is not so well shining as the version seen in the Franc video.
Having a look a the page ...

http://hamsoft.ca/pages/programmers/mmvari-engine.php

... reveals that there are programmers provision. I am pretty sure that those functions have used by the N1MM development team to dress somewhat differently the same MMVARI std.alone code when it is used as an embedded windows/applications.

So Mike, the functions pictured in that video you refer seems not to be present in the stand alone MMVARI interface as also I have watched here. A fast set of tries, between MMVARI stand alone and within N1MM, reveal me this double faced MMVARI behavior. I suspect that some programmer intervention would be required to go deeply.

As noted before here by myself the same try with FLDIGI stand alone and within N1MM revealed an almost similar behavior.
IMHO it seems that FLDIGI have a better user/visual approach to the ting we would like to try.

BTW MMVARi and FLDIGI have theirs respective idiosyncrasies about FSK and the reverse signal treatment. FLDIGI, i.e., will put the normal RTTY in USB, then if it used with pseudo FSK, as with some MicroHam interfaces, it make its receiver side LSB. So, standard RTTY operations with or without MultiChannel enables are AFSK USB for normal. Just the reverse than with MMTTY.

Last but not least, demodulation filters are very basic both in MMVARI e FLDIGI. MMTTY offers much better choices. But this, Mike, will be sounding for us working DX stations from ours part of the fence. It doesn't mean quite nothing when a large slice of known the world is calling you.

There are several other considerations to be done.

Finally tries I have done are:
FLDIGI, AFSK USB, stand alone with the function View>  Signal Browser;
MMVARI but inside N1MM;
FLDIGI inside N1MM, same as stand alone.


               73 de iw1ayd Salvo