Data Sheet AXN/ENC/401 IRIG-106 PCM Encoder Data Sheet Download Resource Login to download this resource Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Forgot password? Don’t have an account? Register here. The AXN/ENC/401 is used to encode data in an IRIG-106 Chapter 4 (Ch.4) PCM stream. AXN/ENC/401 IRIG-106 PCM encoder (PMF output)