One of the primary training goals of the RTO Course is teaching the students to use off-the-shelf commo equipment, and often the cheapest equipment they can source, in unconventional ways. The best thing about that is providing the spark that lights a fire. The students really learn think outside the box and in the process, open up whole new means of communicating they didn’t even know was possible; digital communications with a cheap dual band handheld being one of them.
The biggest reward in all that is getting feedback from the students after they’ve experimented and perfected the process. To me, creating little monsters going out and getting the work done means they’re spreading that knowledge. Here’s what one student of both the RTO and Advanced RTO sent in after experimenting with various modes using his team’s UV-5Rs:
Here is something I found that might be interesting for the Digital Radio Modes.
My summary of what he said (plus other comments):
- Good – MT63-2KL
- Better – QPSK500
- Best – 8PSK1000F and 8PSK1200F(need good signal) on simplex (non-acoustical coupling)
- Best – 8PSK500F on repeater (non-acoustical coupling)
- Note: One big thing we (he) found for higher 8PSK modes (not non-8PSK) is to use a pilot tone and set to 1800 and not the normal 1500 on the waterfall (this waterfall setting may be valid for their specific repeater)
I think substituting BPSK500 and 8PSK500 (both on AndFlmsg) would be ok. I’ll do some real world testing with Tank and report back. There were also other modes used in this thread that I want to test as well.
Also I have a start on the Advanced Reports for AndFlmsg, but they are not loading correctly. I’m going to check with the NBEMS group and see whats the trick.
As my SIGINT students have learned, after mapping an enemy’s communications plan, the next step is to record their voices while mapping the electronic order of battle. Sending bursts of data, absent any voice (in the event DMR or other voice digital protocols are demodulated) makes exploitation much, much harder while also mitigating the DF threat. In addition, following the other operating techniques we cover, clandestine communications over a local area are absolutely possible with very little money invested using equipment you probably already have.
Its a modernization of the same techniques of old- bargain basement warfare. It worked then, it works now.