Always remember - 1 astronomical unit = about 8.33 light minutes. If you send out a radio signal, it will reach a receiver 1 astronomical unit away in about 8 minutes 20 or so seconds. So they will know that there's a radio source 1AU away, and they'll know what your location was 8.33 minutes ago.
An object, such as a planetary body, that is 1 light hour out is 7.2 and a bit AU out. Light and radio signals will take one hour to get to that body. Don't expect a response in any less than 2 hours, not including the time it takes to access, download, decrypt and read your message, compose a reply, fire up their own transmitter, encode it, and send back their own radio ping.
Jupiter is 5.2 AU out. So any receiver at that distance able to receive a signal from your radio source would be 0.72 light hours out.
Using just radio signals, communications within a solar system would be subject to lag time in hours, rather than weeks. Kind of like an Age of Sail situation, but think on a smaller scale, people using homing pigeons rather than sailing ships.