There is no obligation to open source code. However, for United States hams, modulation must be documented, so that it is at least theoretically possible for an independent implementation to be done for monitoring purposes. From the US rules: 97.309(a)(4). An amateur station transmitting a RTTY or data emission using a digital code specified in this paragraph may use any technique whose technical characteristics have been documented publicly, such as CLOVER, G-TOR, or PacTOR, for the purpose of facilitating communications. So if you're keeping it a secret until patents are filed, then US hams aren't authorized to use it. You can document the modulation while keeping the source code and processing algorithms secret, though, and we'd be allowed to use it.
Interesting. The lastest version now has the ability to select a number of transceivers and sound card. Working fine here, with my FTDX101D, so is there a of agreed frequencies yet to make a contact?
Thank you for the valuable information. This may well be the end of LongChat unless I disclose all the technical information about the mode.
As another person posted earlier, in FLDIGI there is a RXID button in the upper righthand corner that IDs the most common modes, and will ask you if you want to change modes and QSY to that frequency.
Yes, and no. Best explanation is asking a question: does our experimentation (note the emphasis) with data modes end with Joe Taylor? I'll more than grant that most of the new modes coming out today aren't really bringing anything to the party in terms of being able to get a signal through, reliability, data efficiency, etc. but I really don't mind that, for this reason: Until you throw something at the wall how do you know if it's going to stick?
For an example of the level of published technical information suggested for new Digital modes see what was released by the company that produced Pactor-4, see https://www.p4dragon.com/download/PACTOR-4 Protocol.pdf it didn't need to reveal any of their IP
"A new QRP digital chirp mode for Ham Radio" What is the purpose of the "QRP" reference? Is there a reason the mode could not be used at any power level? Just curious.
It is to encourage people to use it at very low power levels. It can be used at high power too but just unnecessary.
Just found about Vara Hf for ham radio. It also has 2.4 Khz bandwidth with proprietary software. It seems to be approved by FCC. I think I can do same. I can give necessary technical information that FCC wants without disclosing my software code.
Thank you for sharing! This looks very interesting. I can see some use cases this can be used. 73, Sean
I not heard the chirp/chirp of AMTOR for a very long time, but I mostly hang out on th CW parts of the bandds.
