A220/A221 with Microhard L400 Radio Supplemental Release Notes Kyli Johnson - Outback Guidance October 05, 2020 16:54 Updated Follow 875-0285-000_A1 (MNL,USER GUIDE,ADDENDUM,A22X L400).pdf 2 MB Download Related articles Using an External Camera with the Rebel A220 Smart Antenna, Quick Reference Guide A221 Base Station Operation Notes A320/A220 LED's are lit with bottom LED flashing but the Intellislope or Integra monitor is displaying no GPS / RTK.