Hi,
We have a free trial available for Herald Pro which is a fast and easy to use Radio Link design tool for the PC.
Herald Pro works between 450MHz and 38GHz and is ITU and North American objectives compliant.
Herald Pro exports and imports with Google Earth so you can quickly visualize links and sites.
There is more detail on Herald Pro at
https://www.heraldpro.com including a free trial download and a free radio link design e-book including Lab Exercises that you can complete using Herald Pro.
Anyone who downloads the trial and goes on to purchase within 30 days also receives a 20% discount on the price.
This is a great way to learn professional link design as you have a professional tool that you can use on your own PC to help fully understand the concepts.
Cheers
Steve