The program claims to be compatible with MIL-STD 188-110, thus it would be very surprising if the FCC did not allow its use here in the U.S.
I suppose if it did not interoperate with any other MIL-STD-188-110 modem, then you could get suspicious about how it functions, but almost no hams would have such a modem available to them for testing, HI. Since RFSM2400 also includes a "non-standard" mode made specifically for ham audio bandwidth use it does not seem that this is a limiting factor. It is probably a moot point since it is likely not being used by many (any?) of us due to its limitations. It is doubtful that I will be using it anymore since further development on the free version has been discontinued and I it is rare that anyone will pay for digital ham software now that there are so many good programs available that can outperform MIL-STD-118-110 when the signals become weak ... which is so often the case on ham frequencies. The main use of high speed modems has been for casual e-mail use when conditions are good enough to permit such transfers. There is some interest in being able to send larger documents and images, by a few of us, but it is a very small subset of hams and I have not seen much interest from others. 73, Rick, KV9U shajducek wrote: > Hi Rick, > > The last time I checked they had still not released the details of > the Data Link Protocol (DLP) being used, which could be just about > anything by the way, which means FCC rules make it's use illegal. > > As to Matt's use of it on MARS, there too its prohibuted as it needs > approval for use since its not using a standard DLP such as FS1052DLP > or S5066DLP. > > Anyhow, to get full performance from any MIL-STD-188-110 PSK modem > the radio IF BW needs to be wide enough for the symbol rate and PSK > carrier being used, which in full up standard mode is a full 3Khz, > This is especially critical with more channel QSB to achieve the > needed error correction rate. > > /s/ Steve, N2CKH > >
