With 1-minute transmission intervals, JT9 occupies less than 16 Hz bandwidth. JT9 uses the same logical encoding as JT65, but modulates to a 9 tone FSK signal. There also a page of statistics about the project. FT8, FT4, PSK, RTTY, JT65, JT9 Frequencies for Region-1. JT65, world-wide QSOs are possible with power levels of a few watts and compromise antennas. Considering my compromised antenna situation, JT9 sure makes the most of things. 10139-10140 JT65/JT9/Experimental Note: narrow reflects usage IARU could reassess use up to 10142 later 10140.1-10140.4 kHz WSPR (Existing) 10138.
There is a map display of this information. JT9 really rocks I have WAS on JT65 and I think Im about 10 or 11 states away from WAS on JT9 (coincidentally, about the same number for WAS on CW).
It will also provide an archive of reception records that can be used for research purposes. This can be useful in determining propagation conditions or in adjusting antenna and/or radio parameters. The way that this would be used is that an amateur would call CQ and could then (within a few minutes) see where his signal was received. The duplicate check is to make sure that the callsign is not corrupted. JT9 weak-signal ham radio mode category is a curation of 5 web resources on, JT65 and JT9 on MacOS X, JT65A and JT9 - Operating Guide, Operating JT9. After contacting the WSJT-X group i have tried the messageaggregator programme (included in the package). The pattern chosen is typically part of a standard CQ call. Yes but, the strange think is: besides that the udp bandmap remain empty the JT9 (or JT65) qsos automatically are logged into Logger32 73. This is of interest to the amateur who transmitted adn they will be able to see where their signal was received.
The way that it works is that many amateurs will run a client that will monitor received traffic for callsigns (the pattern ‘de callsign callsign’) and, when seen, will report this fact. This started out as a project to automatically gather reception records of PSK activity and then make those records available in near realtime to interested parties - typically the amateur who initiated the communication.