The best way to identify the various audio sounds of the digital modes is to listen to examples on the internet:
http://www.bcar.us/Digital%20Signals.htm#loran-c or http://www.kb9ukd.com/digital/ Then you can get some idea at least of the various modes and how they sound. Some modes have many different speeds, e.g., Olivia, DominoEX, etc., and I can not always be sure what speed they are running at. If both stations are using Multipsk, it is possible to turn on the RS ID for either transmitting or detection of an RS ID. If an RS ID signal transmits in the passband and you have the RS ID detection turned on, you will be moved close to zero beat and the mode will change to match the type of signal. If you use the Video ID, a FAX transmission will be made that crudely shows the mode and speed. I find the Video ID to be difficult to read at times. As time goes on, you will get much more adept at knowing the mode and maybe the speed, but sometimes you will not be able to decode something because you have not matched the speed, mode, and even sometimes whether it might be reversed tones. 73, Rick, KV9U Kevin wrote: >I am starting to get back into digital modes after a number of years >away from it. Before was mainly on VHF packet. >Back then I had a AEA PK-232 multimode modem. Back then I loved this >unit for it's many features. >One of the features I liked was the ability to have the PK-232 decide >what the digital signal was, Packet, Amtor, Rtty etc. > >Today I am using MixW, and Ham Radio Deluxe, which are great software >packages, and have just recently downloaded Hamscope (But haven't >tried it yet). But none of these have the feature to allow it to >search and decide the type of digital mode it is. >Maybe it's the number of different digital modes now out there that >make this feature unusable, but is there something out there, or >could it be added? > >Why I ask this is listerning around, I hear what I believe to be a >Rtty, PSK or the others (listerned to the tones from some of the web >sites) and I can not for the life of me to get them to decode. I even >change the modes as it goes to see if this helps, in most cases I am >unable to see anything. My success rate s about 20-25% > >I am using a Kenwood TS-480S, and using the Data connection for RX >and TX to the computer. I get a good pattern on the waterfall, and >can see strong signals when there. > >Anyway I will keep trying to get it working, then I will try my hand >at transmitting. > >Thanks for any help you can send my way. Will hopefully get it >working 100% soon. > >Regards > >Kevin, ZL1KFM > > > > > >
