![]() ![]() space convention, in which case you may have to use the "Rev" button to override the software's choice. They may use a different shift and a different mark vs. Non-amateur RTTY does not necessarily follow amateur conventions. Of course, if your radio is not interfaced, then it's up to you to make the radio and the software line up with each other. If it does this correctly, you should not need to select "Rev" for amateur signals, regardless of which sideband your radio is on. If the radio is interfaced for radio control, the program knows which sideband you are on and is able to adjust its audio mark and space accordingly. On the other hand, multi-mode software like fldigi uses USB for all other digital modes on all bands, so it may be easier for users to do AFSK RTTY on USB as well. It was designed to use LSB on all bands, whether in FSK or AFSK, so if you choose to use USB, you need to select "Rev" in MMTTY. Example: MMTTY is a RTTY-only program that supports both FSK and AFSK. However, for AFSK, this can be dealt with in software, and different programs do it differently. PSK-31 working with Fldigi (still being looked into). The fldigi nanoIO sketch offers something that the other two cannot the ability to switch between RTTY and CW modes by a simple menu choice in fldigi. RTTY FSK will be generated with MMTTY FT-8 FT-4 will be generated WSJT-X CW will be generated with N1MM+ CW Decoding will be done with FlDigi An Internet time sync program will be needed. In FSK mode, all amateur radios I know of receive on LSB on all bands, and that is where "RTTY is LSB on all bands" comes from. If you want to operate accurately timed FSK RTTY and use N1MM, WriteLog, DXLab, Logger32, DX4WIN, MMTTY, 2Tone, fldigi and many others, you want the TinyFSK sketch. They are not the same except in FSK (or in some specialized AFSK modes on rigs like the Elecraft K3). fldigi is a program that incorporates many different digital modems and allows radio amateurs to transmit and decode audio messages using these different modes. ![]() Note as well that the amateur convention is to spot and log the actual RF mark frequency, not the radio's dial frequency. Sentiment analysis is the process of analyzing and categorizing the piece of text to know if it’s a positive, negative, or neutral statement. That can be achieved either with USB and mark audio above space, or with LSB and mark below space at audio. Fldigi Exchange for CQ-WW-RTTY Contest Dick Kriss 12 years ago The posting is to obtain advice on the best fldigi setup for Exchange macros and logging for the upcoming CQ-WW-RTTY contest. The amateur standard is 170 Hz shift, space frequency below mark frequency at RF. ![]()
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