Basically Digital communication is based in to connect your Transceiver to your PC for to send Data (files, comments, photos, etc.) to other Stations. You can send photos (SSTV), do a chat (packet, RTTY...), send and receive files, do DX, digital CW, etc. Finally to do Contacts by radio, but in a diferent Way.
You can practise this with equipment you have now, your transceiver and your PC. Is necessary only a small interface to join they, as for example a modem for radio, a TNC or simply your PC Sound Card (for last one is necesary a simple home made wire with PTT conmutator).
I use a PC Core i3 3000Mhz and modem SB-1000 USB by CG Antenna but I have still my old Modem Sitelco PRS 1.200 K under Windows 98, two TNC inside my Kenwood equipments and a home made adaptor for sound card. I started using an old 386 with 2Mb of Ram on MS-Dos and windows 3.1, But is clear that if you use better PC you would obtain better results and nowadays there are a lot of very good programs.
On my CB guide you will find a few frequencies for Digital Conmunication on 27Mhz, to learn more about Digital modes Click here.
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