Product Sheet AXN/TCG/401 Axon Voice-to-digital Converter (CVSD) Product Sheet Download the Product Sheet share The AXN/TCG/401 is a dual audio-to-digital converter module. At the core of the module is a delta-modulator where the delta size depends on the rate of change. Download Resource Login to download this resource Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Don’t have an account?Register here.