MMSSTV Ver 1.11G (C) JE3HHT 2002-2005 This is a slow scan TV (SSTV) software which I find works well with the CIAO software, Winrad, etc. It works directly off of the Wave Output in the mixers recording settings. And you do not have to use the Virtual Cable because of this with this software. Check this out and I hope you will enjoy it. >>>So far I find that HamScope, Chip 64, Weather Fax, and numerous BPSK >>>softwares work very well with CIAO and Winrad. All of which add allot of >>>features and functions to SDR capabilities. And I almost forgot but Ham DRM >>>works also. Ham DRM is a DRM software that is of a narrower bandwidth and >>>is something that not only gives the Ham CD quality audio but graphics also >>>and so it is virtually voice and SSTV all in one in its operations: as well >>>as text and other data. DRM Modification: I realize that because of the way that broadcast Dream DRM works, if anyone has a receiver that has really wide sideband then DRM can be worked in a wide upper side band mode. (Sampling audio after the BFO mixer stage.) Ham DRM should work in stock 3 kHz wide filters. Some older communications receivers may have bandwidth settings as high as 20 kHz. You may be able to bypass your too narrow i.f. filter with a mere ceramic capacitor and thus obtain a wide i.f. and work broadcast DRM in upper side band without having to add a DRM converter section. If you try this then make sure to observe the signal level and use only enough capacitance to obtain a good dynamic signal range without over loading the audio front end. Your audio front end can thus be an indicator of the signal level. Actually you will not be using the receivers audio but running the audio off after it is mixed with the SSB BFO to the sound card. (Unless your receivers audio section can pass a range of audio spectrum up to 24 kHz you would not want to make any use of it.) And if you get this to working well you will want to add a switch to the capacitor to switch it in and out. Note: stray signals can be picked up by connections made to the i.f. filter section and will have to be tamed. Perhaps a diode switching method to the ceramic cap is called for here. A choke works well in the diode switch to filter the control line. You have to also fix your AGC so that it can be turned off in DRM mode. Normally the SSB BFO mixer is after the mechanical or crystal filter. And so the audio will come after the mixer. Some attentuation may need to be applied to this new output port from the receiver to the sound card. The base band level in the sound card needs to be about the same as you see in the CIAO spectrum display and this can be seen on the DRM spectrum display in dB's. The base band I see most often is around -110 to -115 dB, and the signal level thus much higher. Too much audio signal will place noise and images into the sound card. You will know when you have this right by being able to demodluate AM and SSB in the DRM AM mode window. Yesterday I worked a RTTY station using HamScope (that I believe was called the King Pin and) a member of the 40 year old Pirate Radio "Rodent Revolution" (which is on the web) on 6.922 MHz ranting and raging about how stupid some of us are. This station uses RTTY to sort of produce a airwave newspaper. Some of the Pirate stations in the USA also send out SSTV. Their band is 6.9 to 6.990 MHz.
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