![]() ![]() for all other decoders other than the MMX. It is most certainly cheaper than a satphone setup. ![]() The device appears to be well made as seen on this teardown video - PrepComm MMX TearDown - Keyboard CW? - YouTubeįor the ARS CW purist, the system is a non-starter.įor a 'prepper' that just wants a tool to communicate with friends/family, it would seem to be a ready market. Understanding the RIT function of your rig is key here. Much of the settings are quite 'fiddly' - trying to match the rigs RX to the modem, but it does work fairly well. I upgraded my NUE-PSK modem with the CW software and setting the input to a higher audio frequency does seem to help - much to my surprise. This argues for the 'use widest BW setting' instruction.Īs for the claim to decode at or below the noise floor - also credible, as very small, standalone PSK31 systems, like the NUE-PSK modem routinely does this. I can see how this would work to aid in processing the CW signal to be decoded. This 'feature' all but eliminates the use of a classic CW filter - unless you have a robust RIT function in your rig. This high audio frequency input is what sets this decoder system apart from others on the market - IMO. For many ham rigs, the 1300Hz would be right at the edge of most RX passbands/filters & ditto for many DSP filers." "The higher frequency audio feed caught my attention. I've covered this device elsewhere on the web and also here on the Zed ( Better keyboard CW for Technicians | | QRZ Forums #32) Josh also talks of the use as a decoder with a rig already at hand. This has a few screen shots of the decoding in action. PreppComm DMX-40 - Morse Code Decoding QRP Ham Radio - YouTube To add for those not familiar with the "MMX System' ![]()
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