Yes, of course, so do all SDRs which is why they don't come with high power frontends. GPS Signal generators are sold as test equipment, and design for wired co

Yes, of course, so do all SDRs which is why they don't come with high power frontends. GPS Signal generators are sold as test equipment, and design for wired connection over coax as you say. Using them with a high powered frontend would be illegal. The transmitters I'm talking about are designed for the mobile phone industry. This is an example: http://www.meguro.co.jp/english/product/category/category_01/msg2051_eng.html http://www.meguro.co.jp/english/product/category/category_01... My guess is they're pretty expensive new, but I've seen them locally for about 50USD.